Bug #5473: Raise in method_missing causes infinite loop

• Status: Closed
• Assignee: ko1 (Koichi Sasada)
• Target version: -
• ruby -v: ruby 1.9.3dev (2011-10-11 revision 33457) [i386-darwin9.8.0]

[calamitas (Peter Vanbroekhoven)]

=begin
The following code causes an infinite loop:

class ::Object

def method_missing(m, *a, &b)
  raise ArgumentError.new("haha")
end

end

1.foo

This is due to the raise calling (({to_str})) on the exception, which isn't defined. So a (({method_missing})) that also covers the (({Exception})) class and that contains a (({raise})) (at least the version with one argument) causes an infinite loop.

I'm a bit hesitant to call this a bug, except that the pattern above happened in code that works on Ruby 1.8 and breaks on 1.9.
=end

[ko1 (Koichi Sasada)]

• Status changed from Open to Assigned
• Assignee set to ko1 (Koichi Sasada)

[nobu (Nobuyoshi Nakada)]

• Status changed from Assigned to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r34983.
Peter, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

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• vm_method.c (Init_eval_method): copy basic methods to Exception.
  [ruby-core:40287][Bug #5473]