From: nobu@...
Date: 2019-06-12T15:24:53+00:00
Subject: [ruby-dev:50797] [Ruby trunk Bug#15913] Segumentation fault in using RubyVM::InstructionSequence#to_binary.

Issue #15913 has been updated by nobu (Nobuyoshi Nakada).


Maybe [Bug #14553]?

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Bug #15913: Segumentation fault in using RubyVM::InstructionSequence#to_binary.
https://bugs.ruby-lang.org/issues/15913#change-78492

* Author: binaryta (Takuya Narita)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin18]
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN
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Occur Segmentation fault when the ruby code is class methods with hash argument in if false statement in iteration methods into RubyVM::InstructionSequence.compile.

```ruby
# good
RubyVM::InstructionSequence.compile('puts "Hello, World"').to_binary
RubyVM::InstructionSequence.compile('{}.each {|this| Hash.new({id: 1})}').to_binary

# bad
RubyVM::InstructionSequence.compile('{}.each   {|this| if false; Hash.new({id: 1}); end }').to_binary
RubyVM::InstructionSequence.compile('{}.map    {|this| if false; Hash.new({id: 1}); end }').to_binary
RubyVM::InstructionSequence.compile('{}.select {|this| if false; Hash.new({id: 1}); end }').to_binary
RubyVM::InstructionSequence.compile('{}.each_with_index {|this, i| if false; Hash.new({id: 1}); end }').to_binary
# ... and more iterator methods
```



-- 
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