Bug #21383: Prism leaks memory with invalid yield

• Status: Closed
• Assignee: -
• Target version: -
• Backport: 3.2: DONTNEED, 3.3: DONTNEED, 3.4: REQUIRED

[peterzhu2118 (Peter Zhu)]

Fix: https://github.com/ruby/ruby/pull/13464

The following script leaks memory:

10.times do
  20_000.times do
    eval("class C; yield; end")
  rescue SyntaxError
  end

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

Before:

16464
25536
29424
35904
39552
44576
46736
51600
56096
59824

After:

13488
16160
18240
20528
19760
21808
21680
22272
22064
22336

[peterzhu2118 (Peter Zhu)]

• Status changed from Open to Closed

Applied in changeset git|9f91f3617bab2ee220d298ddb874ef73b10dac23.

---

Fix memory leak with invalid yield in prism

[Bug #21383]

The following script leaks memory:

10.times do
  20_000.times do
    eval("class C; yield; end")
  rescue SyntaxError
  end

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

Before:

16464
25536
29424
35904
39552
44576
46736
51600
56096
59824

After:

13488
16160
18240
20528
19760
21808
21680
22272
22064
22336