tests/test-alias

index parser: fix refcounting in case of errors, refactor

due to incorrect refcounting, on a bad revlog it was failing with:
*** glibc detected *** /usr/bin/python: corrupted double-linked list: 0x0816d318 ***
and a backtrace.

#!/bin/sh

cat >> $HGRCPATH <<EOF
[extensions]
alias=

[alias]
myinit = init
cleanstatus = status -c
unknown = bargle
ambiguous = s
recursive = recursive
EOF

echo '% basic'
hg myinit alias

echo '% unknown'
hg unknown

echo '% ambiguous'
hg ambiguous

echo '% recursive'
hg recursive

cd alias
echo foo > foo
hg ci -Amfoo

echo '% with opts'
hg cleanst