Bug #20304: Memory leak when setting Encoding.default_internal

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: 3.3.0
• Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: REQUIRED, 3.3: REQUIRED

[MaxLap (Maxime Lapointe)]

Problem is present in Ruby 3.2.2, 3.2.3, 3.3.0. Didn't check before.

Put this in a file:

10.times do
  100000.times do
    Encoding.default_internal = nil
  end
  puts `ps -o rss= -p #{$$}`.to_i
end

Result:

$ ruby local.rb
27044
30212
33116
36284
39452
42620
45788
48956
51860
55028

[peterzhu2118 (Peter Zhu)]

• Status changed from Open to Closed
• Backport changed from 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN to 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: REQUIRED, 3.3: REQUIRED

This was fixed in: https://github.com/ruby/ruby/pull/9409

[MaxLap (Maxime Lapointe)]

Ah, thank you! I would have expected that to be in 3.3-head too.