Bug #20312: Memory leak with BigDecimal::EXCEPTION_OVERFLOW

• Status: Third Party's Issue
• Assignee: -
• Target version: -
• ruby -v: 3.3.0
• Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN

[MaxLap (Maxime Lapointe)]

The following causes a memory leak.

I left a commented line, both trigger an memory leak. I assume it's the same bug

require 'bigdecimal'

BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, true)

10.times do |j|
  100000.times do |i|
    begin
      BigDecimal("1E11111111111111111111")
      #BigDecimal("1E1000000000000000000")**10 # Also leaks
    rescue
    end
  end

  GC.start
  puts `ps -o rss= -p #{$$}`.to_i
end

$ ruby local.rb
28652
34988
41060
47396
53732
59804
66140
72476
78548
84884

Happens in 3.2.3, 3.3.0, 3.3-head, ruby-head (of a few days ago).

[hsbt (Hiroshi SHIBATA)]

• Status changed from Open to Third Party's Issue

Hi, @MaxLap (Maxime Lapointe) . Thank you for report this.

Can you file this to https://github.com/ruby/bigdecimal/? bigdecimal is already extracted from canonical ruby repository.

[MaxLap (Maxime Lapointe)]

Oh right! Sorry, done: https://github.com/ruby/bigdecimal/issues/290