Add revlog.LookupError exception, and use it instead of RevlogError.
Remove repo.LookupError, which devolves to the revlog version.
#!/bin/sh
echo "[extensions]" >> $HGRCPATH
echo "mq=" >> $HGRCPATH
hg init a
cd a
hg qnew first.patch
hg qnew first.patch
touch ../first.patch
hg qimport ../first.patch
exit 0