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bug#32479: Fix tracking of freed emacs_values with enabled --module-asse

From: Sergey Vinokurov
Subject: bug#32479: Fix tracking of freed emacs_values with enabled --module-assertions
Date: Mon, 20 Aug 2018 09:27:46 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1


I was developing a dynamic module when I noticed that when
'--module-assertions' are enabled I got strange complaints regarding
value to be freed. Namely, Emacs was producing an error message like the
following one:

    Emacs module assertion: Global value was not found in list of 10 globals

I tracked it down to a bug in module_free_global_ref. It's traversal of
the linked list of all allocated global values was flawed and only
considered the head of the list. Please find attached my attempt at
fixing it and a test in Emacs test suite that reproduces the issue.


Attachment: 0001-Fix-detection-of-freed-emacs_values.patch
Description: Text Data

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