[ruby-core:78184] [Ruby trunk Bug#12950] readline-related segfaults

Issue #12950 has been reported by dota? =op dota? =op.

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Bug #12950: readline-related segfaults
https://bugs.ruby-lang.org/issues/12950

* Author: dota? =op dota? =op
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux]
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
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i'm getting stuff liek this:
```
/usr/lib/ruby/2.3.0/irb/input-method.rb:151: [BUG] Segmentation fault at 0x00000000000000
ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux]
```
and this:
```
*** Error in `/usr/bin/ruby': malloc(): smallbin double linked list corrupted: 0x0000564c509fa040 ***
```

randomly on rails console. it seems readline-related.

i managed to reproduce by repeating commands until crash occurred, logs attached.

---Files--------------------------------
ERORR (255 KB)
ERORR2 (32.7 KB)


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