Mercurial > hg
view tests/test-archive-symlinks.t @ 24624:6f0e6fa9fdd7
dirs._addpath: don't mutate Python strings after exposing them (issue4589)
One of the rules of Python strings is that they're immutable. dirs._addpath
breaks this assumption for performance, which is fine as long as it is done
safely -- once a string is no longer internal-only it shouldn't be mutated.
Unfortunately, we weren't being safe here -- we were mutating 'key' even after
adding it to a dictionary.
This only really affects other C code that reads strings, so it's somewhat hard
to write a test for this without poking into the internal representation of the
string via ctypes or similar. There is currently no C code that reads the
output of the string, but there will likely be some soon as the bug indicates.
There's no significant difference in performance.
author | Siddharth Agarwal <sid0@fb.com> |
---|---|
date | Mon, 06 Apr 2015 10:46:44 -0700 |
parents | 7a9cbb315d84 |
children | 4d2b9b304ad0 |
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#require symlink $ origdir=`pwd` $ hg init repo $ cd repo $ ln -s nothing dangling avoid tar warnings about old timestamp $ hg ci -d '2000-01-01 00:00:00 +0000' -qAm 'add symlink' $ hg archive -t files ../archive $ hg archive -t tar -p tar ../archive.tar $ hg archive -t zip -p zip ../archive.zip files $ cd "$origdir" $ cd archive $ "$TESTDIR/readlink.py" dangling dangling -> nothing tar $ cd "$origdir" $ tar xf archive.tar $ cd tar $ "$TESTDIR/readlink.py" dangling dangling -> nothing zip $ cd "$origdir" $ unzip archive.zip > /dev/null 2>&1 $ cd zip $ "$TESTDIR/readlink.py" dangling dangling -> nothing $ cd ..