Bug #11954: "self has wrong type to call super in this context" under weird circumstances

• Status: Closed
• Assignee: shugo (Shugo Maeda)
• Target version: -
• ruby -v: ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-linux]
• Backport: 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: DONTNEED, 2.3: DONE

[schnittchen (Thomas Stratmann)]

See attached file snafu.rb.

This file was obtained by inlining and reducing a large codebase...

[splattael (Peter Leitzen)]

I can reproduce this bug on 2.3.0 and was able to reduce the broken code even more increasing the amount of iterations:

https://gist.github.com/splattael/7b45e0f16e0084f50668

[shugo (Shugo Maeda)]

• File invoke_bmethod.diff invoke_bmethod.diff added
• Status changed from Open to Assigned
• Assignee set to ko1 (Koichi Sasada)

The bug was introduced in r52104 by ko1, and it seems to be fixed by the attached patch, but Im' not sure.

[ko1 (Koichi Sasada)]

Shugo-san, thank you for your investigating.
It seems perfect.
Could you commit it? or should I commit it?

Thanks,
Koichi

[fcheung (Frederick Cheung)]

Koichi Sasada wrote:

Shugo-san, thank you for your investigating.
It seems perfect.
Could you commit it? or should I commit it?

Was this ever committed/backported ? I've encountered this in real world usage with 2.3.1, and Peter's reproduction script continues to show the issue (although I had to increase iteration count to get consistent failure)

[shugo (Shugo Maeda)]

• Assignee changed from ko1 (Koichi Sasada) to shugo (Shugo Maeda)

I missed ko1's comment. I'll commit it later.

[shugo (Shugo Maeda)]

• Status changed from Assigned to Closed

Applied in changeset r55462.

---

• vm.c (invoke_bmethod, invoke_block_from_c_0): revert r52104
  partially to avoid "self has wrong type to call super in this
  context" errors.
  [ruby-core:72724] [Bug #11954]

[shugo (Shugo Maeda)]

• Backport changed from 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN to 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: DONTNEED, 2.3: REQUIRED

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: DONTNEED, 2.3: REQUIRED to 2.0.0: DONTNEED, 2.1: DONTNEED, 2.2: DONTNEED, 2.3: DONE

ruby_2_3 r55560 merged revision(s) 55462.