Mercurial > hg

changeset 28557:4b83507bfc91

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cache: safer handling of failing seek when writing revision branch cache If the seek for some reason fails (perhaps because the file is too short to search to the requested position), make sure we seek to the start and rewrite everything. It is unknown if this fixes a real problem that ever happened.
author Mads Kiilerich <madski@unity3d.com>
date Sun, 13 Mar 2016 02:06:22 +0100
parents 0706d60d070f
children bcd106d456c4
files mercurial/branchmap.py
diffstat 1 files changed, 3 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/mercurial/branchmap.py	Sun Mar 13 02:06:21 2016 +0100
+++ b/mercurial/branchmap.py	Sun Mar 13 02:06:22 2016 +0100
@@ -482,6 +482,9 @@
                 if f.tell() != start:
                     repo.ui.debug("truncating %s to %s\n" % (_rbcrevs, start))
                     f.seek(start)
+                    if f.tell() != start:
+                        start = 0
+                        f.seek(start)
                     f.truncate()
                 end = revs * _rbcrecsize
                 f.write(self._rbcrevs[start:end])