From: kazuki@...
Date: 2018-06-23T04:51:18+00:00
Subject: [ruby-dev:50582] [Ruby trunk Bug#14865] Raising exception in c_return event hook causes infinite loop

Issue #14865 has been reported by ktsj (Kazuki Tsujimoto).

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Bug #14865: Raising exception in c_return event hook causes infinite loop
https://bugs.ruby-lang.org/issues/14865

* Author: ktsj (Kazuki Tsujimoto)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.6.0dev (2018-06-23) [x86_64-linux]
* Backport: 2.3: WONTFIX, 2.4: REQUIRED, 2.5: REQUIRED
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c_returnのイベントフックの中で例外を起こすと無限ループになるケースがあります。
例外発生時にフレームがポップされずスタックに残り続けてしまうのが原因です。

~~~
$ cat t.rb
TracePoint.new(:c_return){|tp|
  p tp.method_id
  raise
}.enable{
  tap{ itself }
}
$ ruby t.rb
:itself
:tap
:tap
(snip)
~~~




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