From: ujihisa@...
Date: 2018-04-11T08:08:46+00:00
Subject: [ruby-core:86504] [Ruby trunk Bug#14566] `raise` in `Exception#message` causes infinite loop

Issue #14566 has been updated by ujihisa (Tatsuhiro Ujihisa).


Thx!

----------------------------------------
Bug #14566: `raise` in `Exception#message` causes infinite loop
https://bugs.ruby-lang.org/issues/14566#change-71448

* Author: pocke (Masataka Kuwabara)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.6.0dev (2018-03-01 trunk 62592) [x86_64-linux]
* Backport: 2.3: DONTNEED, 2.4: DONTNEED, 2.5: REQUIRED
----------------------------------------
This code does not stop. 


```ruby
class A < StandardError
  def message
    raise
  end
end

raise A
```

The following code also does not stop.


```ruby
class A < StandardError
  def message
    1/0
  end
end

raise A
```

And they ignore CTRL-C, so I should do CTRL-Z (suspend) and `kill -9` to stop them.



I confirmed the problem in Ruby 2.5 and trunk.

```
$ ruby -v
ruby 2.5.0p0 (2017-12-25 revision 61468) [x86_64-linux]

$ ruby -v
ruby 2.6.0dev (2018-03-01 trunk 62592) [x86_64-linux]
```

But Ruby 2.4 and 2.3 do not stop (I does not have Ruby 2.2 because I cannot build it in my environment.).
I can get same outputs between `raise` and `1/0` in the `message` method body.

```
$ ruby -v test.rb
ruby 2.4.3p205 (2017-12-14 revision 61247) [x86_64-linux]
test.rb:7:in `<main>': A

$ ruby -v test.rb
ruby 2.3.6p384 (2017-12-14 revision 61254) [x86_64-linux]
test.rb:7:in `<main>': A
```

---Files--------------------------------
fix-bug-14566.patch (1.75 KB)


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