Issue #10392 has been updated by Tomoyuki Chikanaga.

Backport changed from 2.0.0: DONE, 2.1: REQUIRED to 2.0.0: DONE, 2.1: DONE

Backported into `ruby_2_1` at r48003.

----------------------------------------
Bug #10392: Ripper.sexp("<<'E'\n E\n\n")
https://bugs.ruby-lang.org/issues/10392#change-49520

* Author: Akira Tanaka
* Status: Closed
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
* ruby -v: ruby 2.2.0dev (2014-10-16 trunk 47971) [x86_64-linux]
* Backport: 2.0.0: DONE, 2.1: DONE
----------------------------------------
以下のようにすると SEGV になります。

```
% cat z.rb
require 'ripper'
Ripper.sexp("<<'E'\n E\n\n")
% ./ruby z.rb
/home/ruby/tst1/lib/ruby/2.2.0/ripper/sexp.rb:31: [BUG] Segmentation fault at 0x00000000000008
ruby 2.2.0dev (2014-10-16 trunk 47971) [x86_64-linux]

-- Control frame information -----------------------------------------------
c:0004 p:---- s:0013 e:000012 CFUNC  :parse
c:0003 p:0028 s:0010 e:000009 METHOD /home/ruby/tst1/lib/ruby/2.2.0/ripper/sexp.rb:31
c:0002 p:0021 s:0004 E:000190 EVAL   z.rb:2 [FINISH]
c:0001 p:0000 s:0002 E:001920 TOP    [FINISH]

-- Ruby level backtrace information ----------------------------------------
z.rb:2:in `<main>'
/home/ruby/tst1/lib/ruby/2.2.0/ripper/sexp.rb:31:in `sexp'
/home/ruby/tst1/lib/ruby/2.2.0/ripper/sexp.rb:31:in `parse'

-- Machine register context ------------------------------------------------
 RIP: 0x00007fc0402e08ca RBP: 0x00007fffbe5f1a20 RSP: 0x00007fffbe5f19f0
 RAX: 0x0000000000000000 RBX: 0x0000000000000097 RCX: 0x0000000000000097
 RDX: 0x00007fffbe5f1a40 RDI: 0x00007fc042a98ae0 RSI: 0x0000000000000097
  R8: 0x00007fc042a3fc50  R9: 0x0000000000000003 R10: 0x00007fffbe5f1ac0
 R11: 0x00007fc0402eaa06 R12: 0x00007fc040215860 R13: 0x00007fffbe5f3d50
 R14: 0x00007fc042a9ab70 R15: 0x00007fc03f04bf20 EFL: 0x0000000000010206

-- C level backtrace information -------------------------------------------
/home/ruby/tst1/ruby/ruby(rb_print_backtrace+0x19) [0x7fc04034c0f1] vm_dump.c:694
/home/ruby/tst1/ruby/ruby(rb_vm_bugreport+0xa9) [0x7fc04034c566] vm_dump.c:972
/home/ruby/tst1/ruby/ruby(rb_bug_context+0x113) [0x7fc0403a90b3] error.c:391
/home/ruby/tst1/ruby/ruby(sigsegv+0x8d) [0x7fc0402d61f8] signal.c:851
/lib/x86_64-linux-gnu/libpthread.so.0 [0x7fc03fdc38d0]
/home/ruby/tst1/ruby/ruby(st_lookup+0x1b) [0x7fc0402e08ca] st.c:386
/home/ruby/tst1/ruby/ruby(lookup_method_table+0x4a) [0x7fc04033cb16] vm_method.c:209
/home/ruby/tst1/ruby/ruby(search_method+0x31) [0x7fc04033d86e] vm_method.c:566
/home/ruby/tst1/ruby/ruby(rb_method_entry_get_without_cache+0x2b) [0x7fc04033d8fa] vm_method.c:591
/home/ruby/tst1/ruby/ruby(rb_method_entry+0xb8) [0x7fc04033dae2] vm_method.c:662
/home/ruby/tst1/ruby/ruby(check_funcall_respond_to+0x2d) [0x7fc0403407fa] vm_eval.c:369
/home/ruby/tst1/ruby/ruby(rb_check_funcall+0x48) [0x7fc040340a13] vm_eval.c:426
/home/ruby/tst1/ruby/ruby(convert_type+0xcc) [0x7fc04027ae48] object.c:2611
/home/ruby/tst1/ruby/ruby(rb_convert_type+0x47) [0x7fc04027afe8] object.c:2647
/home/ruby/tst1/ruby/ruby(rb_str_to_str+0x2b) [0x7fc0402e61f1] string.c:1057
/home/ruby/tst1/ruby/ruby(rb_string_value+0x4b) [0x7fc0402e827a] string.c:1657
/home/ruby/tst1/ruby/ruby(rb_str_append+0x1c) [0x7fc0402eaa22] string.c:2340
/home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so(parser_here_document+0x197) [0x7fc03e72620b] ripper.y:6540
/home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so(parser_yylex+0x5c) [0x7fc03e729345] ripper.y:7676
/home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so(yylex+0x3f) [0x7fc03e72b004] ripper.y:8334
/home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so(ripper_yyparse+0x383)[0x7fc03e71b899] parse.c:4767
/home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so(ripper_parse0+0x3b) [0x7fc03e72d1b8] ripper.y:10853
/home/ruby/tst1/ruby/ruby(rb_ensure+0x148) [0x7fc0402194cf] eval.c:911
/home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so(ripper_parse+0xe5) [0x7fc03e72d2e3] ripper.y:10889
/home/ruby/tst1/ruby/ruby(call_cfunc_0+0x29) [0x7fc040331db2] vm_insnhelper.c:1357
/home/ruby/tst1/ruby/ruby(vm_call_cfunc_with_frame+0x1fc) [0x7fc0403328a6] vm_insnhelper.c:1523
/home/ruby/tst1/ruby/ruby(vm_call_cfunc+0x2b) [0x7fc0403329af] vm_insnhelper.c:1613
/home/ruby/tst1/ruby/ruby(vm_call_method+0x113) [0x7fc040333382] vm_insnhelper.c:1801
/home/ruby/tst1/ruby/ruby(vm_call_general+0x2b) [0x7fc040333bdb] vm_insnhelper.c:1960
/home/ruby/tst1/ruby/ruby(vm_exec_core+0x27d1) [0x7fc040337460] insns.def:1028
/home/ruby/tst1/ruby/ruby(vm_exec+0xe4) [0x7fc040347838] vm.c:1367
/home/ruby/tst1/ruby/ruby(rb_iseq_eval_main+0x34) [0x7fc0403489cc] vm.c:1637
/home/ruby/tst1/ruby/ruby(ruby_exec_internal+0x131) [0x7fc040217bbf] eval.c:253
/home/ruby/tst1/ruby/ruby(ruby_exec_node+0x24) [0x7fc040217ce8] eval.c:318
/home/ruby/tst1/ruby/ruby(ruby_run_node+0x3e) [0x7fc040217cbb] eval.c:310
/home/ruby/tst1/ruby/ruby(main+0x71) [0x7fc040215a01] main.c:36

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

* Loaded script: z.rb

* Loaded features:

    0 enumerator.so
    1 rational.so
    2 complex.so
    3 /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/enc/encdb.so
    4 /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/enc/trans/transdb.so
    5 /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/rbconfig.rb
    6 thread.rb
    7 /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/thread.so
    8 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/compatibility.rb
    9 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/defaults.rb
   10 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/deprecate.rb
   11 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/errors.rb
   12 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/version.rb
   13 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/requirement.rb
   14 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/platform.rb
   15 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/basic_specification.rb
   16 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/stub_specification.rb
   17 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/util/stringio.rb
   18 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/specification.rb
   19 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/exceptions.rb
   20 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/core_ext/kernel_gem.rb
   21 /home/ruby/tst1/lib/ruby/2.2.0/monitor.rb
   22 /home/ruby/tst1/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb
   23 /home/ruby/tst1/lib/ruby/2.2.0/rubygems.rb
   24 /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so
   25 /home/ruby/tst1/lib/ruby/2.2.0/ripper/core.rb
   26 /home/ruby/tst1/lib/ruby/2.2.0/ripper/lexer.rb
   27 /home/ruby/tst1/lib/ruby/2.2.0/ripper/filter.rb
   28 /home/ruby/tst1/lib/ruby/2.2.0/ripper/sexp.rb
   29 /home/ruby/tst1/lib/ruby/2.2.0/ripper.rb

* Process memory map:

7fc03dd78000-7fc03df1e000 r--s 00000000 08:01 11799878                   /lib/x86_64-linux-gnu/libc-2.19.so
7fc03df1e000-7fc03df95000 r--s 00000000 08:01 15859726                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so
7fc03df95000-7fc03e4fb000 r--s 00000000 08:01 15073361                   /home/ruby/tst1/ruby/ruby
7fc03e4fb000-7fc03e511000 r-xp 00000000 08:01 11796487                   /lib/x86_64-linux-gnu/libgcc_s.so.1
7fc03e511000-7fc03e710000 ---p 00016000 08:01 11796487                   /lib/x86_64-linux-gnu/libgcc_s.so.1
7fc03e710000-7fc03e711000 rw-p 00015000 08:01 11796487                   /lib/x86_64-linux-gnu/libgcc_s.so.1
7fc03e711000-7fc03e741000 r-xp 00000000 08:01 15859726                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so
7fc03e741000-7fc03e940000 ---p 00030000 08:01 15859726                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so
7fc03e940000-7fc03e943000 rw-p 0002f000 08:01 15859726                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/ripper.so
7fc03e943000-7fc03e946000 r-xp 00000000 08:01 15859747                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/thread.so
7fc03e946000-7fc03eb46000 ---p 00003000 08:01 15859747                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/thread.so
7fc03eb46000-7fc03eb47000 rw-p 00003000 08:01 15859747                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/thread.so
7fc03eb47000-7fc03eb49000 r-xp 00000000 08:01 15859769                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/enc/trans/transdb.so
7fc03eb49000-7fc03ed49000 ---p 00002000 08:01 15859769                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/enc/trans/transdb.so
7fc03ed49000-7fc03ed4a000 rw-p 00002000 08:01 15859769                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/enc/trans/transdb.so
7fc03ed4a000-7fc03ed4c000 r-xp 00000000 08:01 15859801                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/enc/encdb.so
7fc03ed4c000-7fc03ef4b000 ---p 00002000 08:01 15859801                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/enc/encdb.so
7fc03ef4b000-7fc03ef4c000 rw-p 00001000 08:01 15859801                   /home/ruby/tst1/lib/ruby/2.2.0/x86_64-linux/enc/encdb.so
7fc03ef4c000-7fc03f04d000 rw-p 00000000 00:00 0 
7fc03f04d000-7fc03f1ec000 r-xp 00000000 08:01 11799878                   /lib/x86_64-linux-gnu/libc-2.19.so
7fc03f1ec000-7fc03f3eb000 ---p 0019f000 08:01 11799878                   /lib/x86_64-linux-gnu/libc-2.19.so
7fc03f3eb000-7fc03f3ef000 r--p 0019e000 08:01 11799878                   /lib/x86_64-linux-gnu/libc-2.19.so
7fc03f3ef000-7fc03f3f1000 rw-p 001a2000 08:01 11799878                   /lib/x86_64-linux-gnu/libc-2.19.so
7fc03f3f1000-7fc03f3f5000 rw-p 00000000 00:00 0 
7fc03f3f5000-7fc03f4f5000 r-xp 00000000 08:01 11799873                   /lib/x86_64-linux-gnu/libm-2.19.so
7fc03f4f5000-7fc03f6f4000 ---p 00100000 08:01 11799873                   /lib/x86_64-linux-gnu/libm-2.19.so
7fc03f6f4000-7fc03f6f5000 r--p 000ff000 08:01 11799873                   /lib/x86_64-linux-gnu/libm-2.19.so
7fc03f6f5000-7fc03f6f6000 rw-p 00100000 08:01 11799873                   /lib/x86_64-linux-gnu/libm-2.19.so
7fc03f6f6000-7fc03f6fe000 r-xp 00000000 08:01 11799883                   /lib/x86_64-linux-gnu/libcrypt-2.19.so
7fc03f6fe000-7fc03f8fd000 ---p 00008000 08:01 11799883                   /lib/x86_64-linux-gnu/libcrypt-2.19.so
7fc03f8fd000-7fc03f8fe000 r--p 00007000 08:01 11799883                   /lib/x86_64-linux-gnu/libcrypt-2.19.so
7fc03f8fe000-7fc03f8ff000 rw-p 00008000 08:01 11799883                   /lib/x86_64-linux-gnu/libcrypt-2.19.so
7fc03f8ff000-7fc03f92d000 rw-p 00000000 00:00 0 
7fc03f92d000-7fc03f930000 r-xp 00000000 08:01 11796508                   /lib/x86_64-linux-gnu/libdl-2.19.so
7fc03f930000-7fc03fb2f000 ---p 00003000 08:01 11796508                   /lib/x86_64-linux-gnu/libdl-2.19.so
7fc03fb2f000-7fc03fb30000 r--p 00002000 08:01 11796508                   /lib/x86_64-linux-gnu/libdl-2.19.so
7fc03fb30000-7fc03fb31000 rw-p 00003000 08:01 11796508                   /lib/x86_64-linux-gnu/libdl-2.19.so
7fc03fb31000-7fc03fbb2000 r-xp 00000000 08:01 16780134                   /usr/lib/x86_64-linux-gnu/libgmp.so.10.2.0
7fc03fbb2000-7fc03fdb2000 ---p 00081000 08:01 16780134                   /usr/lib/x86_64-linux-gnu/libgmp.so.10.2.0
7fc03fdb2000-7fc03fdb3000 r--p 00081000 08:01 16780134                   /usr/lib/x86_64-linux-gnu/libgmp.so.10.2.0
7fc03fdb3000-7fc03fdb4000 rw-p 00082000 08:01 16780134                   /usr/lib/x86_64-linux-gnu/libgmp.so.10.2.0
7fc03fdb4000-7fc03fdcc000 r-xp 00000000 08:01 11799871                   /lib/x86_64-linux-gnu/libpthread-2.19.so
7fc03fdcc000-7fc03ffcb000 ---p 00018000 08:01 11799871                   /lib/x86_64-linux-gnu/libpthread-2.19.so
7fc03ffcb000-7fc03ffcc000 r--p 00017000 08:01 11799871                   /lib/x86_64-linux-gnu/libpthread-2.19.so
7fc03ffcc000-7fc03ffcd000 rw-p 00018000 08:01 11799871                   /lib/x86_64-linux-gnu/libpthread-2.19.so
7fc03ffcd000-7fc03ffd1000 rw-p 00000000 00:00 0 
7fc03ffd1000-7fc03fff1000 r-xp 00000000 08:01 11799884                   /lib/x86_64-linux-gnu/ld-2.19.so
7fc040002000-7fc0400a6000 r--s 00000000 08:01 16913977                   /usr/lib/debug/lib/x86_64-linux-gnu/libpthread-2.19.so
7fc0400a6000-7fc0400c8000 r--s 00000000 08:01 11799871                   /lib/x86_64-linux-gnu/libpthread-2.19.so
7fc0400c8000-7fc0401d0000 r--p 00000000 08:01 16781848                   /usr/lib/locale/locale-archive
7fc0401d0000-7fc0401d5000 rw-p 00000000 00:00 0 
7fc0401ea000-7fc0401eb000 rw-p 00000000 00:00 0 
7fc0401eb000-7fc0401ec000 ---p 00000000 00:00 0 
7fc0401ec000-7fc0401f1000 rw-p 00000000 00:00 0                          [stack:16182]
7fc0401f1000-7fc0401f2000 r--p 00020000 08:01 11799884                   /lib/x86_64-linux-gnu/ld-2.19.so
7fc0401f2000-7fc0401f3000 rw-p 00021000 08:01 11799884                   /lib/x86_64-linux-gnu/ld-2.19.so
7fc0401f3000-7fc0401f4000 rw-p 00000000 00:00 0 
7fc0401f4000-7fc0404a6000 r-xp 00000000 08:01 15073361                   /home/ruby/tst1/ruby/ruby
7fc0406a6000-7fc0406ac000 rw-p 002b2000 08:01 15073361                   /home/ruby/tst1/ruby/ruby
7fc0406ac000-7fc0406bf000 rw-p 00000000 00:00 0 
7fc042631000-7fc042b35000 rw-p 00000000 00:00 0                          [heap]
7fffbe5d4000-7fffbe5f5000 rw-p 00000000 00:00 0 
7fffbe5fc000-7fffbe5fe000 r-xp 00000000 00:00 0                          [vdso]
7fffbe5fe000-7fffbe600000 r--p 00000000 00:00 0                          [vvar]
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: http://www.ruby-lang.org/bugreport.html
```




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