Issue #14113 has been updated by nobu (Nobuyoshi Nakada).

Status changed from Open to Feedback

2.4.0 is outdated, does it reproduce with 2.4.2, or trunk?

```
Thread 17 Crashed:: thread_pool.rb*
0   libsystem_kernel.dylib        	0x00007fff6b6defce __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fff6b81c150 pthread_kill + 333
2   libsystem_c.dylib             	0x00007fff6b63b30a abort + 127
3   ruby                          	0x000000010ad58ef9 die + 9
4   ruby                          	0x000000010ad5911e rb_bug_context + 542
5   ruby                          	0x000000010ae37f28 sigsegv + 72
6   libsystem_platform.dylib      	0x00007fff6b80ff5a _sigtramp + 26
```

Unfortunately, this just tells that it crashed.
Could you show backtrace at the crash?

----------------------------------------
Bug #14113: Crashed Thread:        15  thread_pool.rb*
https://bugs.ruby-lang.org/issues/14113#change-67835

* Author: lanakushnir (Lana Kushnir)
* Status: Feedback
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin17]
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
Started a project and it immediately crashed. This happened before, but so instantly. 

/Users/vlad/.rbenv/versions/2.4.0/lib/ruby/2.4.0/forwardable.rb:228: [BUG] Segmentation fault at 0x00000000000038
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin17]

---Files--------------------------------
ruby_2017-11-16-085207_iMac.crash (51.3 KB)


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