patch: better handling of sequence of offset patch hunks (issue1941) The built-in patch implementation applied the hunks to the wrong lines of the file if the file in the repo has been modified to skew the patch line numbers and the file contains repetitive sequences of lines.

#!/bin/sh
"$TESTDIR/hghave" symlink || exit 80

rm -rf a
hg init a
cd a

ln -s foo link
hg add link
hg ci -mbad link
hg rm link
hg ci -mok
hg diff -g -r 0:1 > bad.patch
hg up 0
hg import --no-commit bad.patch
hg st