tests/test-issue1089

revset: handle re.compile() errors in grep()

Raise error.ParseError instead of allowing re.error to bubble up.

#!/bin/sh

hg init a
cd a
mkdir a
echo a > a/b
hg ci -Am m
hg rm a
hg ci -m m a

mkdir a b
echo a > a/b
hg ci -Am m
hg rm a
cd b
# relative delete
hg ci -m m ../a