transactions: avoid late tear-down (issue641)
We use weak references (ugh) to avoid having to manually delete
transaction references out of each call frame when an exception occurs.
#!/bin/sh
mkdir test
cd test
echo foo>foo
hg init
hg addremove
hg commit -m 1
hg verify
hg serve -p 20059 -d --pid-file=hg.pid
cat hg.pid >> $DAEMON_PIDS
cd ..
http_proxy= hg clone --pull http://localhost:20059/ copy
cd copy
hg verify
hg co
cat foo
hg manifest --debug
hg pull
echo % issue 622
cd ..
hg init empty
cd empty
hg pull -u ../test