Dominique Pellé wrote:

> Hi
>
> Vim-7.4.1046 (and older) segfaults on Linux x86_64 when doing:
>
> $ vim -u NONE -c 'unlet! c count'
> Vim: Caught deadly signal SEGV
> Vim: Finished.
> Segmentation fault (core dumped)
>
> Interestingly, vim-7.4.52 (that comes with Ubuntu-14.04)
> does not crash.  I did not have the time to do a bisection to
> see which patch introduced the bug.


The command to crash can be simplified to:

$ vim -u NONE -c 'unlet! count'
Vim: Caught deadly signal SEGV

I finally did a bisection:

vim-7.4.698 ... segfault
vim-7.4.697 ... OK

So it's this checkin that introduced the regression:

commit 9bc174b69d2775b0f27ed74bf372608d18c9f3d4
Author: Bram Moolenaar <[email protected]>
Date:   Mon Apr 13 16:16:38 2015 +0200

    patch 7.4.698
    Problem:    Various problems with locked and fixed lists and dictionaries.
    Solution:   Disallow changing locked items, fix a crash, add tests. (Olaf
                Dabrunz)

Regards
Dominique

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