Mercurial > hg > mercurial-crew-with-dirclash
view templates/template-vars.txt @ 827:a61728b58dc0
Fix array overflow bug in bdiff
I ran into a bug while importing a large repository into mercurial.
The diff algorithm does not allocate a big enough array of hunks
for some test cases. This results in memory corruption, and possibly,
as in my case, a seg fault.
You should be able to reproduce this problem with any case of more
than a few lines that follows this pattern:
a b
= =
1 1
2
2 3
4
3 5
.
4 .
.
5
.
.
.
I.e., "a" has blank lines on every other line that have been removed in
"b". In this case, the number of matching hunks is equal to the number
of lines in "b". This is more than ((an + bn)/4 + 2). I'm not sure what
motivates this formula, but when I changed it to the smaller of an or
bn (+ 1), it works.
[comment added by mpm]
author | "Wallace, Eric S" <eric.s.wallace@intel.com> |
---|---|
date | Thu, 04 Aug 2005 13:25:59 -0800 |
parents | f8d44a2e6928 |
children | ba625c8083d8 |
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repo the name of the repo rev a changeset.manifest revision node a changeset node changesets total number of changesets file a filename filenode a file node filerev a file revision filerevs total number of file revisions up the directory of the relevant file path a path in the manifest, starting with "/" basename a short pathname manifest a manifest node manifestrev a manifest revision date a date string age age in hours, days, etc line a line of text (escaped) desc a description (escaped, with breaks) shortdesc a short description (escaped) author a name or email addressv(obfuscated) parent a list of the parent tags a list of tag header the global page header footer the global page footer files a list of file links dirs a set of directory links diff a diff of one or more files annotate an annotated file entries the entries relevant to the page Templates and commands: changelog(rev) - a page for browsing changesets naventry - a link for jumping to a changeset number filenodelink - jump to file diff fileellipses - printed after maxfiles changelogentry - an entry in the log manifest - browse a manifest as a directory tree