From: shugo@...
Date: 2016-07-07T11:12:42+00:00
Subject: [ruby-core:76290] [Ruby trunk Bug#12565] SEGV when using &:foo with tail call optimization

Issue #12565 has been updated by Shugo Maeda.

Assignee set to Nobuyoshi Nakada
Backport changed from 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN to 2.1: DONTNEED, 2.2: DONTNEED, 2.3: REQUIRED

@nobu Please fix it if you come up with a better solution.
It seems that Ruby 2.2 or earlier doesn't have this problem.


----------------------------------------
Bug #12565: SEGV when using &:foo with tail call optimization
https://bugs.ruby-lang.org/issues/12565#change-59533

* Author: Shugo Maeda
* Status: Closed
* Priority: Normal
* Assignee: Nobuyoshi Nakada
* ruby -v: 
* Backport: 2.1: DONTNEED, 2.2: DONTNEED, 2.3: REQUIRED
----------------------------------------
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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