Mercurial > hg
view .hgignore @ 46089:8ff2d8359d0f
persistent-nodemap: properly ignore non-existent `.nd` data file
This code was meant to handle the case of a nodemap docket file
pointing to a nodemap data file that doesn’t exist (anymore),
but most likely caused an `UnboundLocalError` exception instead
when `data` was used on the next line without being defined.
This case is theoretically possible with a race condition
between two hg processes, but is hard to reproduce or test:
* Process A reads a docket file and finds a UID in it
that points to a given data file name.
* Process B decides that this same data file needs compacting.
It writes a new one with a different UID,
overwrites the docket file,
then removes the old data file.
* Only then process A tries to a open a file that doesn’t exist anymore.
Differential Revision: https://phab.mercurial-scm.org/D9533
author | Simon Sapin <simon-commits@exyr.org> |
---|---|
date | Mon, 07 Dec 2020 18:06:53 +0100 |
parents | e63daff6e8ed |
children | ec14c37958ec |
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