In some cases in this file, BUG makes more sense than die. In such
cases, a we get there from a coding error rather than a user error.
'return' has been removed following some instances of BUG since BUG does
not return.
Signed-off-by: Matthew DeVore <matvore@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>