* [9front] git bug: spurious deletion of libmp/tests
@ 2024-07-26 23:37 ori
0 siblings, 0 replies; only message in thread
From: ori @ 2024-07-26 23:37 UTC (permalink / raw)
To: 9front
Short summary: If you sysupdated recently and your
/sys/src/libmp/test/ directory is empty, run:
bind -a /dist/plan9front /
git/revert /sys/src/libmp/test
If there are currently files in the directory, no
action is needed.
What happened:
There was a bug in git that could lead to files gettings
puriously removed on pull when deleting a different file
with the same prefix in some rare circumstances.
This was discovered when I deleted /sys/src/libmp/test.c,
which lead to the /sys/src/libmp/test/ directory getting
cleared out.
Specifically, git sorts the entries in directory structures
strangely, sorting directory entries as though they ended
with a '/'. Git/query was sorting them using strcmp.
This meant that when diffing the directory entries, it
would iterate them in the wrong sort order, which lead
to all mis-compared directory entries being emitted as
removed and then added.
The bug has been fixed, and test.c has been put back
until people get a chance to update git and fix it.
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2024-07-26 23:37 [9front] git bug: spurious deletion of libmp/tests ori
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