Bug #11451: MRI crashes with 'Stack inconsistency error' when a method which yields is called recursively in a particular way

• Status: Closed
• Assignee: ko1 (Koichi Sasada)
• Target version: -
• ruby -v: 2.3.0dev, also present in 2.2.2
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: DONE

[alexdowad (Alex Dowad)]

Dear Ruby people,

How are you? The other day, someone reported that a gem I maintain was crashing under MRI 2.2.2. I traced it through with GDB, found where it was going wrong, and wrote a tiny little patch which makes the crash go away. (Yay!) Can you look at this and check that this patch won't cause any other problems?

Thanks,
Alex Dowad

[alexdowad (Alex Dowad)]

Sorry, I forgot to say... THANKS to Xavier Shay for finding this problem!

[usa (Usaku NAKAMURA)]

• Related to Bug #11071: Stack consistency error while using RSpec and Timecop added

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Assigned
• Assignee set to ko1 (Koichi Sasada)

[ko1 (Koichi Sasada)]

• Status changed from Assigned to Closed

Applied in changeset r51651.

---

• vm_insnhelper.c (vm_invoke_block): we should not expect ci->argc is
  stable after invoking a block. [Bug #11451]
• test/ruby/test_yield.rb: add a test. This test script is given by
  Alex Dowad.

[ko1 (Koichi Sasada)]

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

Thank you for your reproducible script!

[nagachika (Tomoyuki Chikanaga)]

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

Backported into ruby_2_2 branch at r52717.