From: nagachika00@...
Date: 2016-07-30T03:32:02+00:00
Subject: [ruby-core:76621] [Ruby trunk Bug#12565] SEGV when using &:foo with tail call optimization

Issue #12565 has been updated by Tomoyuki Chikanaga.

Backport changed from 2.1: DONTNEED, 2.2: DONTNEED, 2.3: REQUIRED to 2.1: DONTNEED, 2.2: DONTNEED, 2.3: DONE

ruby_2_3 r55779 merged revision(s) 55605.

----------------------------------------
Bug #12565: SEGV when using &:foo with tail call optimization
https://bugs.ruby-lang.org/issues/12565#change-59841

* Author: Shugo Maeda
* Status: Closed
* Priority: Normal
* Assignee: Nobuyoshi Nakada
* ruby -v: 
* Backport: 2.1: DONTNEED, 2.2: DONTNEED, 2.3: DONE
----------------------------------------
The following script causes SEGV:

```ruby
RubyVM::InstructionSequence.compile_option = {
  :tailcall_optimization => true,
  :trace_instruction => false
}

eval(<<EOF)
def foo(&block)
  yield(1, 2)
end

def bar
  foo(&:*)
end

p bar
EOF
```



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