Catch HTTPException when reading from remote http repository. If the server dies very early, an httplib.IncompleteRead exception may be raised, because httplib can't read a single byte. Catching all HTTPException subclasses here will prevent ugly backtraces for similar things, too.

#!/bin/sh

mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -m "test" -d "1000000 0"
hg verify
hg parents
hg status
hg undo
hg verify
hg parents
hg status