Bug #11961: Array#delete_if gets an unexpected behavior when Array is modified during execution

• Status: Closed
• Assignee: nobu (Nobuyoshi Nakada)
• Target version: -
• ruby -v: ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-linux]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN

[elionne (Stéphane Clérambault)]

However strange is the code below the behavior is not which expected.

a = %w(aue)
a.delete_if { a.delete_if { true }; true}
p a

with ruby 2.3 it produces:

["aue", false, false]

with ruby 2.2 it procudes:

[]

After a git bisect I found 5ec029d1ea52224a365a11987379c3e9de74b47a (r49255) commit for feature #10714 as possible culprit.

[elionne (Stéphane Clérambault)]

• Subject changed from Array#delete_if get an expected behavior when Array in modified during treatment to Array#delete_if gets an unexpected behavior when Array is modified during execution

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed