From: "alanwu (Alan Wu)" <noreply@...>
Date: 2022-11-21T20:52:38+00:00
Subject: [ruby-core:110845] [Ruby master Bug#19140] rb_vm_insn_addr2insn: invalid insn address

Issue #19140 has been updated by alanwu (Alan Wu).


Thanks for the report. The stack trace shows that it's crashing
during GC, which means some bytecode object on the heap is corrupt:

    Stack trace of thread 1006223:
    #0  0x00007f0646646bc7 __pthread_kill_implementation (libc.so.6 + 0x8abc7)
    #1  0x00007f06465f9b46 raise (libc.so.6 + 0x3db46)
    #2  0x00007f06465e44b5 abort (libc.so.6 + 0x284b5)
    #3  0x00007f064690dbaa rb_bug (libruby-3.0.4.so.3.0 + 0x39baa)
    #4  0x00007f064690ea03 rb_vm_insn_addr2insn2.cold (libruby-3.0.4.so.3.0 + 0x3aa03)
    #5  0x00007f06469fc9a7 rb_iseq_mark (libruby-3.0.4.so.3.0 + 0x1289a7)
    #6  0x00007f06469cfb6b gc_marks_continue (libruby-3.0.4.so.3.0 + 0xfbb6b)
    #7  0x00007f06469cff6b newobj_slowpath_wb_protected (libruby-3.0.4.so.3.0 + 0xfbf6b)

Unfortunately, since some time has eslapsed since the corruption has happened in the
process, the logs alone don't tell the whole story. These type of issues are hard to
debug without a way to reproduce the crash on our end. We'll keep an eye out for similar
reports, but I'm afraid there might not be a quick fix.

It looks like Mastadon might gain Ruby 3.1 support soon. I would suggest upgrading
to 3.1 when it's available to see if the issue still occurs.

----------------------------------------
Bug #19140: rb_vm_insn_addr2insn: invalid insn address
https://bugs.ruby-lang.org/issues/19140#change-100203

* Author: turion (Manuel B��renz)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.0.4p208 (2022-04-12 revision 3fa771dded) [x86_64-linux]
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
I recently upgraded my mastodon installation to 4.0.2 (and possibly also updated a minor ruby version, not sure) and since then I'm experiencing regular crashes with error messages like:

```
Nov 21 15:25:18 manuelbaerenz puma[1006220]: /nix/store/1m8li3dkfj33kk4xhx6bhjbqi6y9bq6x-mastodon-gems-4.0.2/lib/ruby/gems/3.0.0/gems/activesupport-6.1.7/lib/active_support/json/encoding.rb:58: [BUG] rb_vm_insn_addr2insn: invalid insn address: 0x00007f0646b56e20
```
An example log with long stacktrace and coredump can be found in https://github.com/mastodon/mastodon/files/10057376/mastodon.log

I previously reported this error here where I learned that this must be a Ruby bug:

https://github.com/rails/rails/issues/46540
https://github.com/mastodon/mastodon/discussions/21311



-- 
https://bugs.ruby-lang.org/

Unsubscribe: <mailto:ruby-core-request@ruby-lang.org?subject=unsubscribe>
<http://lists.ruby-lang.org/cgi-bin/mailman/options/ruby-core>