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Bug #15952

closed

Issue with Array#unshift, sometimes doesn't respect frozenness of array

Added by luke-gru (Luke Gruber) almost 3 years ago. Updated over 2 years ago.

Status:
Closed
Priority:
Normal
Assignee:
-
Target version:
-
[ruby-core:93322]

Description

This should raise a FrozenError, but doesn't:

a = [1] * 100
b = a[4..-1]
a.replace([1])
b.freeze
b.unshift("a") # no error

There is a code path in ary_ensure_room_for_unshift where the frozen check is skipped. I'll hoist this check to the top of the function in a PR.

Thanks,

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