Issue #12781 has been reported by Pascal Lindelauf.

----------------------------------------
Bug #12781: Segmentation fault on macOS Sierra (sqlite3_adapter.rb)
https://bugs.ruby-lang.org/issues/12781

* Author: Pascal Lindelauf
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: 2.3.1p112
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
----------------------------------------
After upgrading my MBP to macOS Sierra, I now get a segmentation fault on the sqlite3_adapter.rb with every request sent to Unicorn:

Process:               ruby [76419]
Path:                  /Users/USER/*/ruby
Identifier:            ruby
Version:               0
Code Type:             X86-64 (Native)
Parent Process:        ruby [76365]
Responsible:           ruby [76419]
User ID:               501

Date/Time:             2016-09-21 21:45:59.376 +0200
OS Version:            Mac OS X 10.12 (16A323)
Report Version:        12
Anonymous UUID:        94938429-ECC7-E834-111E-88A23F743A65


Time Awake Since Boot: 5400 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGABRT)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000110
Exception Note:        EXC_CORPSE_NOTIFY

VM Regions Near 0x110:
--> 
    __TEXT                 000000010c3e6000-000000010c625000 [ 2300K] r-x/rwx SM=COW  /Users/USER/*

Application Specific Information:
crashed on child side of fork pre-exec

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff95404dda __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fff954ef797 pthread_kill + 90
2   libsystem_c.dylib             	0x00007fff9536a440 abort + 129
3   ruby                          	0x000000010c42aa19 die + 9
4   ruby                          	0x000000010c42ac5e rb_bug_context + 574
5   ruby                          	0x000000010c4ff114 sigsegv + 68
6   libsystem_platform.dylib      	0x00007fff954e2bba _sigtramp + 26
7   libdispatch.dylib             	0x00007fff952cb678 _dispatch_source_type_signal + 88
8   libsqlite3.dylib              	0x00007fff94e86520 unixOpen + 2112
9   libsqlite3.dylib              	0x00007fff94e823dc sqlite3BtreeOpen + 2924
10  libsqlite3.dylib              	0x00007fff94e7e237 openDatabase + 1239
11  sqlite3_native.bundle         	0x000000010e9c3d4f initialize + 799
12  ruby                          	0x000000010c58b994 vm_call0_body + 532
13  ruby                          	0x000000010c58c22d rb_call0 + 397
14  ruby                          	0x000000010c48c649 rb_class_new_instance + 41
15  ruby                          	0x000000010c584e9a vm_call_cfunc + 314
16  ruby                          	0x000000010c56f5fc vm_exec_core + 10236
17  ruby                          	0x000000010c57f6d3 vm_exec + 131
18  ruby                          	0x000000010c58d267 catch_i + 87
19  ruby                          	0x000000010c57c73b rb_catch_protect + 155
20  ruby                          	0x000000010c57cf9c rb_f_catch + 76
21  ruby                          	0x000000010c584e9a vm_call_cfunc + 314
22  ruby                          	0x000000010c56f408 vm_exec_core + 9736
23  ruby                          	0x000000010c57f6d3 vm_exec + 131
24  ruby                          	0x000000010c58c22d rb_call0 + 397
25  ruby                          	0x000000010c57aba2 send_internal + 610
26  ruby                          	0x000000010c584e9a vm_call_cfunc + 314
27  ruby                          	0x000000010c56f408 vm_exec_core + 9736
28  ruby                          	0x000000010c57f6d3 vm_exec + 131
29  ruby                          	0x000000010c57ad47 rb_yield + 183
30  ruby                          	0x000000010c3e9549 rb_ary_each + 41
31  ruby                          	0x000000010c584e9a vm_call_cfunc + 314
32  ruby                          	0x000000010c56f408 vm_exec_core + 9736
33  ruby                          	0x000000010c57f6d3 vm_exec + 131
34  ruby                          	0x000000010c437330 rb_load_internal0 + 288
35  ruby                          	0x000000010c43819f rb_f_load + 159
36  ruby                          	0x000000010c584e9a vm_call_cfunc + 314
37  ruby                          	0x000000010c56f5fc vm_exec_core + 10236
38  ruby                          	0x000000010c57f6d3 vm_exec + 131
39  ruby                          	0x000000010c437330 rb_load_internal0 + 288
40  ruby                          	0x000000010c43819f rb_f_load + 159
41  ruby                          	0x000000010c584e9a vm_call_cfunc + 314
42  ruby                          	0x000000010c56f5fc vm_exec_core + 10236
43  ruby                          	0x000000010c57f6d3 vm_exec + 131
44  ruby                          	0x000000010c437330 rb_load_internal0 + 288
45  ruby                          	0x000000010c43819f rb_f_load + 159
46  ruby                          	0x000000010c584e9a vm_call_cfunc + 314
47  ruby                          	0x000000010c56f5fc vm_exec_core + 10236
48  ruby                          	0x000000010c57f6d3 vm_exec + 131
49  ruby                          	0x000000010c433608 ruby_exec_internal + 152
50  ruby                          	0x000000010c433516 ruby_run_node + 54
51  ruby                          	0x000000010c3e6aaf main + 79
52  libdyld.dylib                 	0x00007fff952d6255 start + 1

Thread 1:: ruby-timer-thr
0   libsystem_kernel.dylib        	0x00007fff95406236 poll + 10
1   ruby                          	0x000000010c59db43 thread_timer + 371
2   libsystem_pthread.dylib       	0x00007fff954ecabb _pthread_body + 180
3   libsystem_pthread.dylib       	0x00007fff954eca07 _pthread_start + 286
4   libsystem_pthread.dylib       	0x00007fff954ec231 thread_start + 13

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x0000000000000006  rcx: 0x00007fff53814518  rdx: 0x0000000000000000
  rdi: 0x0000000000000203  rsi: 0x0000000000000006  rbp: 0x00007fff53814540  rsp: 0x00007fff53814518
   r8: 0x0000000000000040   r9: 0x00007fff9dfbd040  r10: 0x0000000008000000  r11: 0x0000000000000206
  r12: 0x00007fff53814670  r13: 0x000000000000008f  r14: 0x00007fff9dfd93c0  r15: 0x000000010c5b4416
  rip: 0x00007fff95404dda  rfl: 0x0000000000000206  cr2: 0x00007fff9dfbb128
  
Logical CPU:     0
Error Code:      0x02000148
Trap Number:     133


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    0x7fff9529e000 -     0x7fff952d0fff  libdispatch.dylib (703.1.4) <12B1D95B-283D-325D-85AB-29A2FFD36987> /usr/lib/system/libdispatch.dylib
    0x7fff952d1000 -     0x7fff952d6ff3  libdyld.dylib (421.1) <CDFBDC9C-418C-369D-B433-F64B0630E640> /usr/lib/system/libdyld.dylib
    0x7fff952d7000 -     0x7fff952d7ffb  libkeymgr.dylib (28) <09CD7CA6-46D2-3A9F-B9F1-7C4CA5CA0D68> /usr/lib/system/libkeymgr.dylib
    0x7fff952e5000 -     0x7fff952e5fff  liblaunch.dylib (972.1.5) <DC31FDEA-FD81-335E-BAA8-5A7395D20772> /usr/lib/system/liblaunch.dylib
    0x7fff952e6000 -     0x7fff952ebfff  libmacho.dylib (894) <1EAE5ADD-490C-3B1F-9F97-447BA8E0E90F> /usr/lib/system/libmacho.dylib
    0x7fff952ec000 -     0x7fff952eeff3  libquarantine.dylib (85) <78EF62D8-C890-3FC0-937A-C2FD8CEF8992> /usr/lib/system/libquarantine.dylib
    0x7fff952ef000 -     0x7fff952f0ffb  libremovefile.dylib (45) <C4FC07FF-ED86-382E-B06F-33C34718080C> /usr/lib/system/libremovefile.dylib
    0x7fff952f1000 -     0x7fff95309ff7  libsystem_asl.dylib (349.1.1) <F0987490-8427-367F-B302-A05A7D61FEBF> /usr/lib/system/libsystem_asl.dylib
    0x7fff9530a000 -     0x7fff9530aff7  libsystem_blocks.dylib (67) <B8C3701D-5A91-3D35-999D-2DC8D5393525> /usr/lib/system/libsystem_blocks.dylib
    0x7fff9530b000 -     0x7fff95398fe7  libsystem_c.dylib (1158.1.2) <5F260836-48E4-3F57-8553-62D2DA228A1F> /usr/lib/system/libsystem_c.dylib
    0x7fff95399000 -     0x7fff9539cffb  libsystem_configuration.dylib (888.1.2) <67BB9D8B-2430-38AD-81A7-F0EC924B2590> /usr/lib/system/libsystem_configuration.dylib
    0x7fff9539d000 -     0x7fff953a0fff  libsystem_coreservices.dylib (41.1) <11F22E6C-0DCB-3699-A4F0-C99E301E56E9> /usr/lib/system/libsystem_coreservices.dylib
    0x7fff953a1000 -     0x7fff953b9ffb  libsystem_coretls.dylib (121.1.1) <8F7E9B12-400D-3276-A9C5-4546B0258554> /usr/lib/system/libsystem_coretls.dylib
    0x7fff953ba000 -     0x7fff953c0fff  libsystem_dnssd.dylib (765.1.2) <C5FF2025-C60B-39C6-B205-6BF1BC51D1B3> /usr/lib/system/libsystem_dnssd.dylib
    0x7fff953c1000 -     0x7fff953eafff  libsystem_info.dylib (503) <C686B834-5E7D-382C-AF6E-44AB78EE83E2> /usr/lib/system/libsystem_info.dylib
    0x7fff953eb000 -     0x7fff9540dff7  libsystem_kernel.dylib (3789.1.32) <5C68A0D7-C3C9-3E52-B983-EDE9A28AB6FC> /usr/lib/system/libsystem_kernel.dylib
    0x7fff9540e000 -     0x7fff95455fe7  libsystem_m.dylib (3121.4) <E3370D16-EBAA-3C7F-AC56-2D6EAD7DB0A4> /usr/lib/system/libsystem_m.dylib
    0x7fff95456000 -     0x7fff95474ff7  libsystem_malloc.dylib (116) <3DD17B88-B7A4-38B9-9E95-AB88E1C3B647> /usr/lib/system/libsystem_malloc.dylib
    0x7fff95475000 -     0x7fff954cbfff  libsystem_network.dylib (856.1.8) <A8973360-956A-33BF-9971-14D59C84E0D1> /usr/lib/system/libsystem_network.dylib
    0x7fff954cc000 -     0x7fff954d5ff3  libsystem_networkextension.dylib (563.1.11) <1C551832-9360-36DD-A7BA-52B55A171720> /usr/lib/system/libsystem_networkextension.dylib
    0x7fff954d6000 -     0x7fff954dfffb  libsystem_notify.dylib (165) <AF77D471-6B13-36BA-B144-7E7DDB9DBA9F> /usr/lib/system/libsystem_notify.dylib
    0x7fff954e0000 -     0x7fff954e8fe7  libsystem_platform.dylib (126.1.2) <884DDF42-3CAE-334A-82CE-965617130FB1> /usr/lib/system/libsystem_platform.dylib
    0x7fff954e9000 -     0x7fff954f3fff  libsystem_pthread.dylib (218.1.3) <050AE77B-4F4B-334A-A5BA-CF0D10AF5304> /usr/lib/system/libsystem_pthread.dylib
    0x7fff954f4000 -     0x7fff954f7fff  libsystem_sandbox.dylib (592.1.3) <90FEF628-316D-3F84-9EF4-F7F510A4FBBB> /usr/lib/system/libsystem_sandbox.dylib
    0x7fff954f8000 -     0x7fff954f9fff  libsystem_secinit.dylib (24) <A54B8FEF-E792-3C54-8E0B-E80A376662F2> /usr/lib/system/libsystem_secinit.dylib
    0x7fff954fa000 -     0x7fff95501fff  libsystem_symptoms.dylib (532.1.1) <B26F656E-94F9-3834-9B03-51C4FF11D1BF> /usr/lib/system/libsystem_symptoms.dylib
    0x7fff95502000 -     0x7fff95522ff7  libsystem_trace.dylib (518.1.16) <C3CDF7BC-CA3D-34F5-ADF8-46AAAB0B47F8> /usr/lib/system/libsystem_trace.dylib
    0x7fff95523000 -     0x7fff95528ffb  libunwind.dylib (35.3) <9F7C2AD8-A9A7-3DE4-828D-B0F0F166AAA0> /usr/lib/system/libunwind.dylib
    0x7fff95529000 -     0x7fff95552ff7  libxpc.dylib (972.1.5) <2A901937-48E1-3BF2-83F1-2431156D82B7> /usr/lib/system/libxpc.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 2
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 3840
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=164.2M resident=0K(0%) swapped_out_or_unallocated=164.2M(100%)
Writable regions: Total=177.0M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=177.0M(100%)
 
                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Dispatch continuations            8192K        2 
Kernel Alloc Once                    8K        2 
MALLOC                           160.4M       25 
MALLOC guard page                   16K        4 
STACK GUARD                       56.0M        3 
Stack                             8736K        4 
Stack Guard                          4K        2 
VM_ALLOCATE                          8K        3 
__DATA                            3716K      118 
__LINKEDIT                       113.7M       68 
__TEXT                            50.5M      114 
__UNICODE                          556K        2 
shared memory                       12K        4 
===========                     =======  ======= 
TOTAL                            401.4M      338 






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