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bug#30931: 27.0.50; Crash in "Automatic GC"

From: Noam Postavsky
Subject: bug#30931: 27.0.50; Crash in "Automatic GC"
Date: Mon, 26 Mar 2018 10:20:47 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (gnu/linux)

Noam Postavsky <address@hidden> writes:

> next time it was just mark_stack, but the object being marked still
> looks like an undo-list.

Here's the gdb evidence of that.  I note that the reproduction recipe
disables undo via (let ((buffer-undo-list t))...), but looking at its
code, I see that yasnippet unconditionally pushes entries onto the undo
list anyway.  Michał, is the binding of buffer-undo-list significant for
your reproduction (i.e., did the original crash happen in an
undo-disabled buffer)?

Attachment: gdb.log
Description: gdb session log

Attachment: xxlist.gdb
Description: xxlist gdb command

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