Bug #19836: Parser leaks memory for incomplete lambdas

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 3.0: REQUIRED, 3.1: REQUIRED, 3.2: DONE

[peterzhu2118 (Peter Zhu)]

GitHub Pull Request: https://github.com/ruby/ruby/pull/8192

The parser does not free the chain of struct vtable, which causes memory leaks.

The following script reproduces this issue:

10.times do
  100_000.times do
    Ripper.parse("-> {")
  end

  puts `ps -o rss= -p #{$$}`
end

[peterzhu2118 (Peter Zhu)]

• Status changed from Open to Closed

Applied in changeset git|0b8f15575a440f85ac686f5b0eae8f8b7c2b72e7.

---

Fix memory leak for incomplete lambdas

[Bug #19836]

The parser does not free the chain of struct vtable, which causes
memory leaks.

The following script reproduces this issue:

10.times do
  100_000.times do
    Ripper.parse("-> {")
  end

  puts `ps -o rss= -p #{$$}`
end

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 3.0: REQUIRED, 3.1: REQUIRED, 3.2: REQUIRED to 3.0: REQUIRED, 3.1: REQUIRED, 3.2: DONE

ruby_3_2 0c908fa681271f13750aa64420203f1a58fa03fe merged revision(s) 0b8f15575a440f85ac686f5b0eae8f8b7c2b72e7.