Bug #16641: Backport request: MJIT crashes on a certain flow of branches

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.7.0p0 (2019-12-25 revision 647ee6f091) [x86_64-linux]
• Backport: 2.5: DONTNEED, 2.6: DONE, 2.7: DONE

[k0kubun (Takashi Kokubun)]

Problem

def a(b)
  ".#{b unless b == 1}" if true
end

print(a(0))

This script test.rb crashes by ruby --disable-gems --jit-verbose=1 --jit-min-calls=1 --jit-wait test.rb.

Patch

I fixed this in c4794ed73ad348a61a7cfbe3da0a7eb49ba46eb9, which needs to be backported to 2.6 and 2.7.

[k0kubun (Takashi Kokubun)]

• Backport changed from 2.5: DONTNEED, 2.6: REQUIRED, 2.7: REQUIRED to 2.5: DONTNEED, 2.6: REQUIRED, 2.7: DONE

2.7 backport is done at eaee631d5eda03f77ec39ec6fc1826a06ab06205.

[jeremyevans0 (Jeremy Evans)]

• Status changed from Open to Closed

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.5: DONTNEED, 2.6: REQUIRED, 2.7: DONE to 2.5: DONTNEED, 2.6: DONE, 2.7: DONE

ruby_2_6 r67840 merged revision(s) c4794ed73ad348a61a7cfbe3da0a7eb49ba46eb9.