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Bug #12568

wrong ArgumentError if an array is given for instance_exec with optional argument

Added by naruse (Yui NARUSE) almost 4 years ago. Updated almost 4 years ago.

Status:
Closed
Priority:
Normal
Assignee:
-
Target version:
-
ruby -v:
ruby 2.4.0dev (2016-07-08 trunk 55607) [x86_64-darwin15]
[ruby-core:76300]

Description

From Ruby 2.2 to trunk, it wrongly raise ArgumentError as follows:

Sample code:

instance_exec([1,2,3]){|a| p a}
instance_exec([1,2,3]){|a=[]| p a}
instance_exec([1,2,3], &->(a){ p a })
->(a=[]){ p a }.to_proc.call([1,2,3])
instance_exec([1,2,3], &->(a=[]){ p a })

Expected result:

[1, 2, 3]
[1, 2, 3]
[1, 2, 3]
[1, 2, 3]
[1, 2, 3]

Actual result:

[1, 2, 3]
[1, 2, 3]
[1, 2, 3]
[1, 2, 3]
test.rb:7:in `block in <main>': wrong number of arguments (given 3, expected 0..1) (ArgumentError)
    from test.rb:7:in `instance_exec'
    from test.rb:7:in `<main>'

This issue affect https://github.com/rails/rails/pull/25699


Related issues

Is duplicate of Ruby master - Bug #10687: ArgumentError in certain cases of instance_exec (new bug in 2.2)ClosedActions

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