Issue #15307 has been updated by shevegen (Robert A. Heiler).


> BTW output the code with some markup 1 is a nice idea, but apparently,
> it does the attached output unreadable in Redmine

Redmine can be a bit annoying. In that case it may have been possible
to perhaps write the initial code with proper indent, and add the 
tests in a reply to it - but feel free to ignore this comment. It is
your issue request after all, not mine. :)

(I put the initial code next, just if someone wants to read it with
colours + indent):

    def catch_true(paths, prefixes) # catch_except_p: TRUE
      prefixes.each do |prefix| # catch_except_p: TRUE
        paths.each do |path| # catch_except_p: FALSE
          return path
        end
      end
    end

    def wrapper(paths, prefixes)
      catch_true(paths, prefixes)
    end

    print wrapper(['1'], ['2'])

----------------------------------------
Bug #15307: TestJIT#test_{catching_deep_exception,compile_insn_throw,lambda_longjmp} segfaults
https://bugs.ruby-lang.org/issues/15307#change-74876

* Author: vo.x (Vit Ondruch)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.6.0preview3 (2018-11-06 trunk 65578) [x86_64-linux]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
~~~
  1) Failure:
TestJIT#test_catching_deep_exception [/builddir/build/BUILD/ruby-2.6.0-preview3/test/ruby/test_jit.rb:654]:
Failed to run script with JIT:
```

def catch_true(paths, prefixes) # catch_except_p: TRUE
  prefixes.each do |prefix| # catch_except_p: TRUE
    paths.each do |path| # catch_except_p: FALSE
      return path
    end
  end
end

def wrapper(paths, prefixes)
  catch_true(paths, prefixes)
end

print wrapper(['1'], ['2'])

```


stdout:
```

```


stderr:
```
JIT success (58.5ms): wrapper@-e:10 -> /tmp/_ruby_mjit_p5145u0.c
JIT success (108.5ms): catch_true@-e:2 -> /tmp/_ruby_mjit_p5145u1.c
JIT success (90.8ms): block in catch_true@-e:3 -> /tmp/_ruby_mjit_p5145u2.c
JIT success (45.3ms): block (2 levels) in catch_true@-e:4 -> /tmp/_ruby_mjit_p5145u3.c
-e:5: [BUG] Segmentation fault at 0xfffffffffffffff8
ruby 2.6.0preview3 (2018-11-06 trunk 65578) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0008 p:0005 s:0036 e:000034 BLOCK  -e:5 [FINISH]
c:0007 p:---- s:0031 e:000030 CFUNC  :each
c:0006 p:0007 s:0027 e:000026 BLOCK  -e:4 [FINISH]
c:0005 p:---- s:0023 e:000022 CFUNC  :each
c:0004 p:0006 s:0019 e:000018 METHOD -e:3 [FINISH]
c:0003 p:0008 s:0013 e:000012 METHOD -e:11
c:0002 p:0033 s:0007 e:000005 EVAL   -e:14 [FINISH]
c:0001 p:0000 s:0003 E:001dc0 (none) [FINISH]

-- Ruby level backtrace information ----------------------------------------
-e:14:in `<main>'
-e:11:in `wrapper'
-e:3:in `catch_true'
-e:3:in `each'
-e:4:in `block in catch_true'
-e:4:in `each'
-e:5:in `block (2 levels) in catch_true'

-- Machine register context ------------------------------------------------
 RIP: 0x00007fdf0567d2a0 RBP: 0x00007fffdd24ca60 RSP: 0x0000000000000000
 RAX: 0x000055c05ff18790 RBX: 0x0000000000000000 RCX: 0x000055c05fe4c508
 RDX: 0x0000000000000001 RDI: 0x000055c05fe363e8 RSI: 0x0000000000000000
  R8: 0x0000000000000002  R9: 0x000055c05ff6a030 R10: 0x0000000000000002
 R11: 0x0000000000000000 R12: 0x0000000000000001 R13: 0x0000000022220021
 R14: 0x000055c05fe4c968 R15: 0x0000000000000000 EFL: 0x0000000000010246

-- C level backtrace information -------------------------------------------
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_print_backtrace+0x19) [0x7fdf0568b3d9] vm_dump.c:715
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_bugreport+0x220) [0x7fdf0568b610] vm_dump.c:985
[0x7fdf0552d38f]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(sigsegv+0x46) [0x7fdf05614726] signal.c:998
/lib64/libc.so.6(__restore_rt+0x0) [0x7fdf052f65c0]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0x500) [0x7fdf0567d2a0] vm.c:2037
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_yield+0x352) [0x7fdf056839e2] vm.c:1007
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_ary_each+0x3c) [0x7fdf054c024c] array.c:2076
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(vm_call_cfunc+0x11a) [0x7fdf05672eea] vm_insnhelper.c:1905
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(vm_call_method+0x33) [0x7fdf0567f4b3] vm_insnhelper.c:2391
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(vm_call_general) vm_insnhelper.c:2362
/tmp/_ruby_mjit_p5145u2.so(0x7fdf0276c905) [0x7fdf0276c905]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0x98d) [0x7fdf0567d72d] mjit.h:115
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_yield+0x352) [0x7fdf056839e2] vm.c:1007
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_ary_each+0x3c) [0x7fdf054c024c] array.c:2076
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(vm_call_cfunc+0x11a) [0x7fdf05672eea] vm_insnhelper.c:1905
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(vm_call_method+0x33) [0x7fdf0567f4b3] vm_insnhelper.c:2391
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(vm_call_general) vm_insnhelper.c:2362
[0x7fdf027708f5]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0x98d) [0x7fdf0567d72d] mjit.h:115
[0x7fdf054852a5]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(vm_exec_core+0x357a) [0x7fdf0567a55a] insns.def:766
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0x28e) [0x7fdf0567d02e] vm.c:1821
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(ruby_exec_internal+0xee) [0x7fdf0553139e] eval.c:261
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(ruby_exec_node+0x21) [0x7fdf05533401] eval.c:325
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(ruby_run_node+0x32) [0x7fdf05535dc2] eval.c:317
/builddir/build/BUILD/ruby-2.6.0-preview3/ruby(main+0x73) [0x55c05f4a61e3] ./main.c:42

-- Other runtime information -----------------------------------------------

* Loaded script: -e

* Loaded features:

    0 enumerator.so
    1 thread.rb
    2 rational.so
    3 complex.so
    4 /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
    5 /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so

* Process memory map:

55c05f4a5000-55c05f4a6000 r--p 00000000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
55c05f4a6000-55c05f4a7000 r-xp 00001000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
55c05f4a7000-55c05f4a8000 r--p 00002000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
55c05f4a8000-55c05f4a9000 r--p 00002000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
55c05f4a9000-55c05f4aa000 rw-p 00003000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
55c05fe35000-55c05ffaa000 rw-p 00000000 00:00 0                          [heap]
7fdefc000000-7fdefc021000 rw-p 00000000 00:00 0 
7fdefc021000-7fdf00000000 ---p 00000000 00:00 0 
7fdf013bc000-7fdf016cc000 r--s 00000000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7fdf016cc000-7fdf02741000 r--s 00000000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7fdf02741000-7fdf02748000 r--s 00000000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
7fdf02748000-7fdf0274b000 r--p 00000000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7fdf0274b000-7fdf0275d000 r-xp 00003000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7fdf0275d000-7fdf02760000 r--p 00015000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7fdf02760000-7fdf02761000 ---p 00018000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7fdf02761000-7fdf02762000 r--p 00018000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7fdf02762000-7fdf02763000 rw-p 00019000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7fdf02767000-7fdf02768000 r--p 00000000 00:3a 1065512                    /tmp/_ruby_mjit_p5145u3.so (deleted)
7fdf02768000-7fdf02769000 r-xp 00001000 00:3a 1065512                    /tmp/_ruby_mjit_p5145u3.so (deleted)
7fdf02769000-7fdf0276a000 r--p 00002000 00:3a 1065512                    /tmp/_ruby_mjit_p5145u3.so (deleted)
7fdf0276a000-7fdf0276b000 r--p 00002000 00:3a 1065512                    /tmp/_ruby_mjit_p5145u3.so (deleted)
7fdf0276b000-7fdf0276c000 r--p 00000000 00:3a 1066099                    /tmp/_ruby_mjit_p5145u2.so (deleted)
7fdf0276c000-7fdf0276d000 r-xp 00001000 00:3a 1066099                    /tmp/_ruby_mjit_p5145u2.so (deleted)
7fdf0276d000-7fdf0276e000 r--p 00002000 00:3a 1066099                    /tmp/_ruby_mjit_p5145u2.so (deleted)
7fdf0276e000-7fdf0276f000 r--p 00002000 00:3a 1066099                    /tmp/_ruby_mjit_p5145u2.so (deleted)
7fdf0276f000-7fdf02770000 r--p 00000000 00:3a 1066096                    /tmp/_ruby_mjit_p5145u1.so (deleted)
7fdf02770000-7fdf02771000 r-xp 00001000 00:3a 1066096                    /tmp/_ruby_mjit_p5145u1.so (deleted)
7fdf02771000-7fdf02772000 r--p 00002000 00:3a 1066096                    /tmp/_ruby_mjit_p5145u1.so (deleted)
7fdf02772000-7fdf02773000 r--p 00002000 00:3a 1066096                    /tmp/_ruby_mjit_p5145u1.so (deleted)
7fdf02773000-7fdf02774000 r--p 00000000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7fdf02774000-7fdf02776000 r-xp 00001000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7fdf02776000-7fdf02777000 r--p 00003000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7fdf02777000-7fdf02778000 r--p 00003000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7fdf02778000-7fdf02779000 rw-p 00000000 00:00 0 
7fdf02779000-7fdf0277a000 r--p 00000000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7fdf0277a000-7fdf0277b000 r-xp 00001000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7fdf0277b000-7fdf0277c000 r--p 00002000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7fdf0277c000-7fdf0277d000 r--p 00002000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7fdf0277d000-7fdf0277e000 rw-p 00000000 00:00 0 
7fdf0277e000-7fdf0277f000 ---p 00000000 00:00 0 
7fdf0277f000-7fdf0508c000 rw-p 00000000 00:00 0 
7fdf0508c000-7fdf05099000 r--p 00000000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7fdf05099000-7fdf05134000 r-xp 0000d000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7fdf05134000-7fdf051cf000 r--p 000a8000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7fdf051cf000-7fdf051d0000 r--p 00142000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7fdf051d0000-7fdf051d1000 rw-p 00143000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7fdf051d1000-7fdf051d3000 r--p 00000000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7fdf051d3000-7fdf051e8000 r-xp 00002000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7fdf051e8000-7fdf05202000 r--p 00017000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7fdf05202000-7fdf05203000 r--p 00030000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7fdf05203000-7fdf05204000 rw-p 00031000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7fdf05204000-7fdf0520e000 rw-p 00000000 00:00 0 
7fdf0520e000-7fdf0520f000 r--p 00000000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7fdf0520f000-7fdf05211000 r-xp 00001000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7fdf05211000-7fdf05212000 r--p 00003000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7fdf05212000-7fdf05213000 r--p 00003000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7fdf05213000-7fdf05214000 rw-p 00004000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7fdf05214000-7fdf0521f000 r--p 00000000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7fdf0521f000-7fdf05277000 r-xp 0000b000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7fdf05277000-7fdf0528e000 r--p 00063000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7fdf0528e000-7fdf0528f000 ---p 0007a000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7fdf0528f000-7fdf05291000 r--p 0007a000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7fdf05291000-7fdf05292000 rw-p 0007c000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7fdf05292000-7fdf05294000 r--p 00000000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7fdf05294000-7fdf05298000 r-xp 00002000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7fdf05298000-7fdf0529a000 r--p 00006000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7fdf0529a000-7fdf0529b000 r--p 00007000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7fdf0529b000-7fdf0529c000 rw-p 00008000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7fdf0529c000-7fdf052a2000 r--p 00000000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7fdf052a2000-7fdf052b2000 r-xp 00006000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7fdf052b2000-7fdf052b8000 r--p 00016000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7fdf052b8000-7fdf052b9000 r--p 0001b000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7fdf052b9000-7fdf052ba000 rw-p 0001c000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7fdf052ba000-7fdf052be000 rw-p 00000000 00:00 0 
7fdf052be000-7fdf052e0000 r--p 00000000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7fdf052e0000-7fdf0542d000 r-xp 00022000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7fdf0542d000-7fdf05479000 r--p 0016f000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7fdf05479000-7fdf0547a000 ---p 001bb000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7fdf0547a000-7fdf0547e000 r--p 001bb000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7fdf0547e000-7fdf05480000 rw-p 001bf000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7fdf05480000-7fdf05484000 rw-p 00000000 00:00 0 
7fdf05484000-7fdf05485000 r--p 00000000 00:3a 1066093                    /tmp/_ruby_mjit_p5145u0.so (deleted)
7fdf05485000-7fdf05486000 r-xp 00001000 00:3a 1066093                    /tmp/_ruby_mjit_p5145u0.so (deleted)
7fdf05486000-7fdf05487000 r--p 00002000 00:3a 1066093                    /tmp/_ruby_mjit_p5145u0.so (deleted)
7fdf05487000-7fdf05488000 r--p 00002000 00:3a 1066093                    /tmp/_ruby_mjit_p5145u0.so (deleted)
7fdf05488000-7fdf054b3000 r--p 00000000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7fdf054b3000-7fdf05695000 r-xp 0002b000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7fdf05695000-7fdf05773000 r--p 0020d000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7fdf05773000-7fdf05774000 ---p 002eb000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7fdf05774000-7fdf0577c000 r--p 002eb000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7fdf0577c000-7fdf0577d000 rw-p 002f3000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7fdf0577d000-7fdf05790000 rw-p 00000000 00:00 0 
7fdf05790000-7fdf05791000 r--p 00000000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7fdf05791000-7fdf057b1000 r-xp 00001000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7fdf057b1000-7fdf057b9000 r--p 00021000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7fdf057ba000-7fdf057bb000 r--p 00029000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7fdf057bb000-7fdf057bc000 rw-p 0002a000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7fdf057bc000-7fdf057bd000 rw-p 00000000 00:00 0 
7fffdca51000-7fffdd250000 rw-p 00000000 00:00 0                          [stack]
7fffdd2a8000-7fffdd2ab000 r--p 00000000 00:00 0                          [vvar]
7fffdd2ab000-7fffdd2ad000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]


[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: https://www.ruby-lang.org/bugreport.html


```

.
<true> expected but was
<nil>.

  2) Failure:
TestJIT#test_compile_insn_throw [/builddir/build/BUILD/ruby-2.6.0-preview3/test/ruby/test_jit.rb:394]:
Failed to run script with JIT:
```

def test
  proc do
    if 1+1 == 1
      return 3
    else
      return 4
    end
    5
  end.call
end
print test

```


stdout:
```

```


stderr:
```
JIT success (114.6ms): test@-e:2 -> /tmp/_ruby_mjit_p5933u0.c
JIT success (94.4ms): block in test@-e:3 -> /tmp/_ruby_mjit_p5933u1.c
-e:7: [BUG] Segmentation fault at 0xfffffffffffffff8
ruby 2.6.0preview3 (2018-11-06 trunk 65578) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0004 p:0023 s:0015 e:000013 BLOCK  -e:7 [FINISH]
c:0003 p:0008 s:0011 E:001c90 METHOD -e:10
c:0002 p:0015 s:0007 e:000005 EVAL   -e:12 [FINISH]
c:0001 p:0000 s:0003 E:001a80 (none) [FINISH]

-- Ruby level backtrace information ----------------------------------------
-e:12:in `<main>'
-e:10:in `test'
-e:7:in `block in test'

-- Machine register context ------------------------------------------------
 RIP: 0x00007f56cb70d2a0 RBP: 0x00007ffc385c8930 RSP: 0x0000000000000000
 RAX: 0x0000558c671c8790 RBX: 0x0000000000000000 RCX: 0x0000558c670fcb68
 RDX: 0x0000000000000001 RDI: 0x0000558c670e63e8 RSI: 0x0000000000000000
  R8: 0x0000000000000002  R9: 0x0000558c6721b740 R10: 0x0000000000000002
 R11: 0x0000000000000000 R12: 0x00007f56cb81def0 R13: 0x0000558c670e63e8
 R14: 0x0000558c6721b580 R15: 0x0000000000000000 EFL: 0x0000000000010246

-- C level backtrace information -------------------------------------------
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_print_backtrace+0x19) [0x7f56cb71b3d9] vm_dump.c:715
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_bugreport+0x220) [0x7f56cb71b610] vm_dump.c:985
[0x7f56cb5bd38f]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(sigsegv+0x46) [0x7f56cb6a4726] signal.c:998
/lib64/libc.so.6(__restore_rt+0x0) [0x7f56cb3865c0]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0x500) [0x7f56cb70d2a0] vm.c:2037
/tmp/_ruby_mjit_p5933u0.so(0x7f56c87ffbe5) [0x7f56c87ffbe5]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(vm_exec_core+0x357a) [0x7f56cb70a55a] insns.def:766
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0x28e) [0x7f56cb70d02e] vm.c:1821
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(ruby_exec_internal+0xee) [0x7f56cb5c139e] eval.c:261
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(ruby_exec_node+0x21) [0x7f56cb5c3401] eval.c:325
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(ruby_run_node+0x32) [0x7f56cb5c5dc2] eval.c:317
/builddir/build/BUILD/ruby-2.6.0-preview3/ruby(main+0x73) [0x558c6702c1e3] ./main.c:42

-- Other runtime information -----------------------------------------------

* Loaded script: -e

* Loaded features:

    0 enumerator.so
    1 thread.rb
    2 rational.so
    3 complex.so
    4 /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
    5 /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so

* Process memory map:

558c6702b000-558c6702c000 r--p 00000000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
558c6702c000-558c6702d000 r-xp 00001000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
558c6702d000-558c6702e000 r--p 00002000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
558c6702e000-558c6702f000 r--p 00002000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
558c6702f000-558c67030000 rw-p 00003000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
558c670e5000-558c6725a000 rw-p 00000000 00:00 0                          [heap]
7f56c2f8b000-7f56c4000000 r--s 00000000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f56c4000000-7f56c4021000 rw-p 00000000 00:00 0 
7f56c4021000-7f56c8000000 ---p 00000000 00:00 0 
7f56c84c8000-7f56c87d8000 r--s 00000000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f56c87d8000-7f56c87df000 r--s 00000000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
7f56c87df000-7f56c87e2000 r--p 00000000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f56c87e2000-7f56c87f4000 r-xp 00003000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f56c87f4000-7f56c87f7000 r--p 00015000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f56c87f7000-7f56c87f8000 ---p 00018000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f56c87f8000-7f56c87f9000 r--p 00018000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f56c87f9000-7f56c87fa000 rw-p 00019000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f56c87fe000-7f56c87ff000 r--p 00000000 00:3a 1067157                    /tmp/_ruby_mjit_p5933u0.so (deleted)
7f56c87ff000-7f56c8801000 r-xp 00001000 00:3a 1067157                    /tmp/_ruby_mjit_p5933u0.so (deleted)
7f56c8801000-7f56c8802000 r--p 00003000 00:3a 1067157                    /tmp/_ruby_mjit_p5933u0.so (deleted)
7f56c8802000-7f56c8803000 r--p 00003000 00:3a 1067157                    /tmp/_ruby_mjit_p5933u0.so (deleted)
7f56c8803000-7f56c8804000 r--p 00000000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7f56c8804000-7f56c8806000 r-xp 00001000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7f56c8806000-7f56c8807000 r--p 00003000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7f56c8807000-7f56c8808000 r--p 00003000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7f56c8808000-7f56c8809000 rw-p 00000000 00:00 0 
7f56c8809000-7f56c880a000 r--p 00000000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7f56c880a000-7f56c880b000 r-xp 00001000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7f56c880b000-7f56c880c000 r--p 00002000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7f56c880c000-7f56c880d000 r--p 00002000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7f56c880d000-7f56c880e000 rw-p 00000000 00:00 0 
7f56c880e000-7f56c880f000 ---p 00000000 00:00 0 
7f56c880f000-7f56cb11c000 rw-p 00000000 00:00 0 
7f56cb11c000-7f56cb129000 r--p 00000000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7f56cb129000-7f56cb1c4000 r-xp 0000d000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7f56cb1c4000-7f56cb25f000 r--p 000a8000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7f56cb25f000-7f56cb260000 r--p 00142000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7f56cb260000-7f56cb261000 rw-p 00143000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7f56cb261000-7f56cb263000 r--p 00000000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7f56cb263000-7f56cb278000 r-xp 00002000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7f56cb278000-7f56cb292000 r--p 00017000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7f56cb292000-7f56cb293000 r--p 00030000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7f56cb293000-7f56cb294000 rw-p 00031000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7f56cb294000-7f56cb29e000 rw-p 00000000 00:00 0 
7f56cb29e000-7f56cb29f000 r--p 00000000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7f56cb29f000-7f56cb2a1000 r-xp 00001000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7f56cb2a1000-7f56cb2a2000 r--p 00003000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7f56cb2a2000-7f56cb2a3000 r--p 00003000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7f56cb2a3000-7f56cb2a4000 rw-p 00004000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7f56cb2a4000-7f56cb2af000 r--p 00000000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f56cb2af000-7f56cb307000 r-xp 0000b000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f56cb307000-7f56cb31e000 r--p 00063000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f56cb31e000-7f56cb31f000 ---p 0007a000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f56cb31f000-7f56cb321000 r--p 0007a000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f56cb321000-7f56cb322000 rw-p 0007c000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f56cb322000-7f56cb324000 r--p 00000000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7f56cb324000-7f56cb328000 r-xp 00002000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7f56cb328000-7f56cb32a000 r--p 00006000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7f56cb32a000-7f56cb32b000 r--p 00007000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7f56cb32b000-7f56cb32c000 rw-p 00008000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7f56cb32c000-7f56cb332000 r--p 00000000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7f56cb332000-7f56cb342000 r-xp 00006000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7f56cb342000-7f56cb348000 r--p 00016000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7f56cb348000-7f56cb349000 r--p 0001b000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7f56cb349000-7f56cb34a000 rw-p 0001c000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7f56cb34a000-7f56cb34e000 rw-p 00000000 00:00 0 
7f56cb34e000-7f56cb370000 r--p 00000000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f56cb370000-7f56cb4bd000 r-xp 00022000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f56cb4bd000-7f56cb509000 r--p 0016f000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f56cb509000-7f56cb50a000 ---p 001bb000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f56cb50a000-7f56cb50e000 r--p 001bb000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f56cb50e000-7f56cb510000 rw-p 001bf000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f56cb510000-7f56cb514000 rw-p 00000000 00:00 0 
7f56cb514000-7f56cb515000 r--p 00000000 00:3a 1066472                    /tmp/_ruby_mjit_p5933u1.so (deleted)
7f56cb515000-7f56cb516000 r-xp 00001000 00:3a 1066472                    /tmp/_ruby_mjit_p5933u1.so (deleted)
7f56cb516000-7f56cb517000 r--p 00002000 00:3a 1066472                    /tmp/_ruby_mjit_p5933u1.so (deleted)
7f56cb517000-7f56cb518000 r--p 00002000 00:3a 1066472                    /tmp/_ruby_mjit_p5933u1.so (deleted)
7f56cb518000-7f56cb543000 r--p 00000000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f56cb543000-7f56cb725000 r-xp 0002b000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f56cb725000-7f56cb803000 r--p 0020d000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f56cb803000-7f56cb804000 ---p 002eb000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f56cb804000-7f56cb80c000 r--p 002eb000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f56cb80c000-7f56cb80d000 rw-p 002f3000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f56cb80d000-7f56cb820000 rw-p 00000000 00:00 0 
7f56cb820000-7f56cb821000 r--p 00000000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7f56cb821000-7f56cb841000 r-xp 00001000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7f56cb841000-7f56cb849000 r--p 00021000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7f56cb84a000-7f56cb84b000 r--p 00029000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7f56cb84b000-7f56cb84c000 rw-p 0002a000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7f56cb84c000-7f56cb84d000 rw-p 00000000 00:00 0 
7ffc37dcc000-7ffc385cb000 rw-p 00000000 00:00 0                          [stack]
7ffc385df000-7ffc385e2000 r--p 00000000 00:00 0                          [vvar]
7ffc385e2000-7ffc385e4000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]


[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: https://www.ruby-lang.org/bugreport.html


```

.
<true> expected but was
<nil>.

  3) Failure:
TestJIT#test_lambda_longjmp [/builddir/build/BUILD/ruby-2.6.0-preview3/test/ruby/test_jit.rb:773]:
Failed to run script with JIT:
```

fib = lambda do |x|
  return x if x == 0 || x == 1
  fib.call(x-1) + fib.call(x-2)
end
print fib.call(5)

```


stdout:
```

```


stderr:
```
JIT success (150.3ms): block in <main>@-e:2 -> /tmp/_ruby_mjit_p5985u0.c
-e:3: [BUG] Segmentation fault at 0xfffffffffffffff8
ruby 2.6.0preview3 (2018-11-06 trunk 65578) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0007 p:0021 s:0029 e:000027 BLOCK  -e:3 [FINISH]
c:0006 p:0033 s:0024 e:000023 BLOCK  -e:4 [FINISH]
c:0005 p:0033 s:0020 e:000019 BLOCK  -e:4 [FINISH]
c:0004 p:0033 s:0016 e:000015 BLOCK  -e:4 [FINISH]
c:0003 p:0033 s:0012 e:000011 BLOCK  -e:4
c:0002 p:0015 s:0008 E:0023b8 EVAL   -e:6 [FINISH]
c:0001 p:0000 s:0003 E:0023e0 (none) [FINISH]

-- Ruby level backtrace information ----------------------------------------
-e:6:in `<main>'
-e:4:in `block in <main>'
-e:4:in `block in <main>'
-e:4:in `block in <main>'
-e:4:in `block in <main>'
-e:3:in `block in <main>'

-- Machine register context ------------------------------------------------
 RIP: 0x00007f0121da1539 RBP: 0x00007ffc10720500 RSP: 0x0000000000000000
 RAX: 0x00007f01217abec0 RBX: 0x00007f01217abe88 RCX: 0x000055dfd6578c88
 RDX: 0x0000000000000001 RDI: 0x000055dfd655f3e8 RSI: 0x0000000000000001
  R8: 0x000055dfd66945a4  R9: 0x000055dfd65f7220 R10: 0x0000000000000002
 R11: 0x0000000000000030 R12: 0x000055dfd655f3e8 R13: 0x0000000000000003
 R14: 0x00007ffc10720520 R15: 0x00007f0121eb1ef0 EFL: 0x0000000000010216

-- C level backtrace information -------------------------------------------
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_print_backtrace+0x19) [0x7f0121daf3d9] vm_dump.c:715
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_bugreport+0x220) [0x7f0121daf610] vm_dump.c:985
[0x7f0121c5138f]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(sigsegv+0x46) [0x7f0121d38726] signal.c:998
/lib64/libc.so.6(__restore_rt+0x0) [0x7f0121a1a5c0]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0x799) [0x7f0121da1539] vm.c:1894
/tmp/_ruby_mjit_p5985u0.so(0x7f011ee93a32) [0x7f011ee93a32]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0xfc) [0x7f0121da0e9c] mjit.h:127
[0x7f011ee93a32]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0xfc) [0x7f0121da0e9c] mjit.h:127
[0x7f011ee93a32]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0xfc) [0x7f0121da0e9c] mjit.h:127
[0x7f011ee93a32]
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(vm_exec_core+0x357a) [0x7f0121d9e55a] insns.def:766
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(rb_vm_exec+0x28e) [0x7f0121da102e] vm.c:1821
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(ruby_exec_internal+0xee) [0x7f0121c5539e] eval.c:261
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(ruby_exec_node+0x21) [0x7f0121c57401] eval.c:325
/builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0(ruby_run_node+0x32) [0x7f0121c59dc2] eval.c:317
/builddir/build/BUILD/ruby-2.6.0-preview3/ruby(main+0x73) [0x55dfd5f6c1e3] ./main.c:42

-- Other runtime information -----------------------------------------------

* Loaded script: -e

* Loaded features:

    0 enumerator.so
    1 thread.rb
    2 rational.so
    3 complex.so
    4 /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
    5 /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so

* Process memory map:

55dfd5f6b000-55dfd5f6c000 r--p 00000000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
55dfd5f6c000-55dfd5f6d000 r-xp 00001000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
55dfd5f6d000-55dfd5f6e000 r--p 00002000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
55dfd5f6e000-55dfd5f6f000 r--p 00002000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
55dfd5f6f000-55dfd5f70000 rw-p 00003000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
55dfd655e000-55dfd66d4000 rw-p 00000000 00:00 0                          [heap]
7f0118000000-7f0118021000 rw-p 00000000 00:00 0 
7f0118021000-7f011c000000 ---p 00000000 00:00 0 
7f011daeb000-7f011ddfb000 r--s 00000000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f011ddfb000-7f011ee70000 r--s 00000000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f011ee70000-7f011ee77000 r--s 00000000 fd:11 796839                     /builddir/build/BUILD/ruby-2.6.0-preview3/ruby
7f011ee77000-7f011ee7a000 r--p 00000000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f011ee7a000-7f011ee8c000 r-xp 00003000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f011ee8c000-7f011ee8f000 r--p 00015000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f011ee8f000-7f011ee90000 ---p 00018000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f011ee90000-7f011ee91000 r--p 00018000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f011ee91000-7f011ee92000 rw-p 00019000 fd:11 1179667                    /usr/lib64/libgcc_s-8-20181105.so.1
7f011ee92000-7f011ee93000 r--p 00000000 00:3a 1065924                    /tmp/_ruby_mjit_p5985u0.so (deleted)
7f011ee93000-7f011ee95000 r-xp 00001000 00:3a 1065924                    /tmp/_ruby_mjit_p5985u0.so (deleted)
7f011ee95000-7f011ee96000 r--p 00003000 00:3a 1065924                    /tmp/_ruby_mjit_p5985u0.so (deleted)
7f011ee96000-7f011ee97000 r--p 00003000 00:3a 1065924                    /tmp/_ruby_mjit_p5985u0.so (deleted)
7f011ee97000-7f011ee98000 r--p 00000000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7f011ee98000-7f011ee9a000 r-xp 00001000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7f011ee9a000-7f011ee9b000 r--p 00003000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7f011ee9b000-7f011ee9c000 r--p 00003000 fd:11 786793                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/trans/transdb.so
7f011ee9c000-7f011ee9d000 rw-p 00000000 00:00 0 
7f011ee9d000-7f011ee9e000 r--p 00000000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7f011ee9e000-7f011ee9f000 r-xp 00001000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7f011ee9f000-7f011eea0000 r--p 00002000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7f011eea0000-7f011eea1000 r--p 00002000 fd:11 786738                     /builddir/build/BUILD/ruby-2.6.0-preview3/.ext/x86_64-linux/enc/encdb.so
7f011eea1000-7f011eea2000 rw-p 00000000 00:00 0 
7f011eea2000-7f011eea3000 ---p 00000000 00:00 0 
7f011eea3000-7f01217b0000 rw-p 00000000 00:00 0 
7f01217b0000-7f01217bd000 r--p 00000000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7f01217bd000-7f0121858000 r-xp 0000d000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7f0121858000-7f01218f3000 r--p 000a8000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7f01218f3000-7f01218f4000 r--p 00142000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7f01218f4000-7f01218f5000 rw-p 00143000 fd:11 1181740                    /usr/lib64/libm-2.28.9000.so
7f01218f5000-7f01218f7000 r--p 00000000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7f01218f7000-7f012190c000 r-xp 00002000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7f012190c000-7f0121926000 r--p 00017000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7f0121926000-7f0121927000 r--p 00030000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7f0121927000-7f0121928000 rw-p 00031000 fd:11 1182309                    /usr/lib64/libcrypt.so.1.1.0
7f0121928000-7f0121932000 rw-p 00000000 00:00 0 
7f0121932000-7f0121933000 r--p 00000000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7f0121933000-7f0121935000 r-xp 00001000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7f0121935000-7f0121936000 r--p 00003000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7f0121936000-7f0121937000 r--p 00003000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7f0121937000-7f0121938000 rw-p 00004000 fd:11 1181738                    /usr/lib64/libdl-2.28.9000.so
7f0121938000-7f0121943000 r--p 00000000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f0121943000-7f012199b000 r-xp 0000b000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f012199b000-7f01219b2000 r--p 00063000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f01219b2000-7f01219b3000 ---p 0007a000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f01219b3000-7f01219b5000 r--p 0007a000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f01219b5000-7f01219b6000 rw-p 0007c000 fd:11 1182327                    /usr/lib64/libgmp.so.10.3.2
7f01219b6000-7f01219b8000 r--p 00000000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7f01219b8000-7f01219bc000 r-xp 00002000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7f01219bc000-7f01219be000 r--p 00006000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7f01219be000-7f01219bf000 r--p 00007000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7f01219bf000-7f01219c0000 rw-p 00008000 fd:11 1181754                    /usr/lib64/librt-2.28.9000.so
7f01219c0000-7f01219c6000 r--p 00000000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7f01219c6000-7f01219d6000 r-xp 00006000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7f01219d6000-7f01219dc000 r--p 00016000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7f01219dc000-7f01219dd000 r--p 0001b000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7f01219dd000-7f01219de000 rw-p 0001c000 fd:11 1181750                    /usr/lib64/libpthread-2.28.9000.so
7f01219de000-7f01219e2000 rw-p 00000000 00:00 0 
7f01219e2000-7f0121a04000 r--p 00000000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f0121a04000-7f0121b51000 r-xp 00022000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f0121b51000-7f0121b9d000 r--p 0016f000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f0121b9d000-7f0121b9e000 ---p 001bb000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f0121b9e000-7f0121ba2000 r--p 001bb000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f0121ba2000-7f0121ba4000 rw-p 001bf000 fd:11 1181736                    /usr/lib64/libc-2.28.9000.so
7f0121ba4000-7f0121ba8000 rw-p 00000000 00:00 0 
7f0121bac000-7f0121bd7000 r--p 00000000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f0121bd7000-7f0121db9000 r-xp 0002b000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f0121db9000-7f0121e97000 r--p 0020d000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f0121e97000-7f0121e98000 ---p 002eb000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f0121e98000-7f0121ea0000 r--p 002eb000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f0121ea0000-7f0121ea1000 rw-p 002f3000 fd:11 786661                     /builddir/build/BUILD/ruby-2.6.0-preview3/libruby.so.2.6.0
7f0121ea1000-7f0121eb4000 rw-p 00000000 00:00 0 
7f0121eb4000-7f0121eb5000 r--p 00000000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7f0121eb5000-7f0121ed5000 r-xp 00001000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7f0121ed5000-7f0121edd000 r--p 00021000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7f0121ede000-7f0121edf000 r--p 00029000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7f0121edf000-7f0121ee0000 rw-p 0002a000 fd:11 1181729                    /usr/lib64/ld-2.28.9000.so
7f0121ee0000-7f0121ee1000 rw-p 00000000 00:00 0 
7ffc0ff25000-7ffc10724000 rw-p 00000000 00:00 0                          [stack]
7ffc107df000-7ffc107e2000 r--p 00000000 00:00 0                          [vvar]
7ffc107e2000-7ffc107e4000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]


[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: https://www.ruby-lang.org/bugreport.html


```

.
<true> expected but was
<nil>.

Finished tests in 387.440881s, 51.2207 tests/s, 6041.3836 assertions/s.
19845 tests, 2340679 assertions, 3 failures, 0 errors, 29 skips
~~~

Here are the configuration and build options:

~~~
---
Configuration summary for ruby version 2.6.0

   * Installation prefix: /usr
   * exec prefix:         /usr
   * arch:                x86_64-linux
   * site arch:           ${arch}
   * RUBY_BASE_NAME:      ruby
   * enable shared:       yes
   * ruby lib prefix:     ${exec_prefix}/share/ruby
   * site libraries path: ${sitearchlibdir}/${RUBY_BASE_NAME}
   * vendor path:         /usr/share/ruby/vendor_ruby
   * target OS:           linux
   * compiler:            gcc
   * with pthread:        yes
   * enable shared libs:  yes
   * dynamic library ext: so
   * CFLAGS:              ${optflags} ${debugflags} ${warnflags}
   * LDFLAGS:             -L. -Wl,-z,relro -Wl,--as-needed  -Wl,-z,now \
                          -specs=/usr/lib/rpm/redhat/redhat-hardened-ld \
                          -fstack-protector-strong -rdynamic \
                          -Wl,-export-dynamic
   * DLDFLAGS:            -Wl,-z,relro -Wl,--as-needed  -Wl,-z,now \
                          -specs=/usr/lib/rpm/redhat/redhat-hardened-ld
   * optflags:            -O3
   * debugflags:          -ggdb3
   * warnflags:           -Wall -Wextra -Wno-unused-parameter \
                          -Wno-long-long -Wno-missing-field-initializers \
                          -Wno-tautological-compare \
                          -Wno-parentheses-equality \
                          -Wno-constant-logical-operand -Wno-self-assign \
                          -Wno-cast-function-type -Wunused-variable \
                          -Werror=implicit-int -Werror=pointer-arith \
                          -Werror=write-strings \
                          -Werror=declaration-after-statement \
                          -Werror=implicit-function-declaration \
                          -Werror=deprecated-declarations \
                          -Werror=misleading-indentation \
                          -Wno-overlength-strings \
                          -Wno-packed-bitfield-compat \
                          -Wsuggest-attribute=noreturn \
                          -Wsuggest-attribute=format -Wmissing-noreturn \
                          -Wimplicit-fallthrough=0 -Werror=duplicated-cond \
                          -Werror=restrict
   * strip command:       strip -S -x
   * install doc:         yes
   * MJIT support:        yes
   * man page type:       doc

---
+ make -j4 'COPY=cp -p' Q=
	BASERUBY = echo executable host ruby is required.  use --with-baseruby option.; false
	CC = gcc
	LD = ld
	LDSHARED = gcc -shared
	CFLAGS = -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -fPIC -m64
	XCFLAGS = -D_FORTIFY_SOURCE=2 -fstack-protector-strong -fno-strict-overflow -DRUBY_DEVEL=1 -fvisibility=hidden -fexcess-precision=standard -DRUBY_EXPORT -DCANONICALIZATION_FOR_MATHN
	CPPFLAGS =   -I. -I.ext/include/x86_64-linux -I./include -I. -I./enc/unicode/10.0.0 
	DLDFLAGS = -Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-soname,libruby.so.2.6 -fstack-protector-strong  -m64
	SOLIBS = -lpthread -lrt -lrt -lgmp -ldl -lcrypt -lm 
	LANG = C
	LC_ALL = 
	LC_CTYPE = 
~~~

And some versions which might be relevant.

~~~
$ rpm -q gcc
gcc-8.2.1-5.fc30.x86_64

$ rpm -q glibc
glibc-2.28.9000-16.fc30.x86_64
~~~

Not sure what else could have influence



-- 
https://bugs.ruby-lang.org/

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