tree bc1aad9418072be3a01c1002cafb34af41327302
parent 34b146c0f444fc9f83bea3215bd0cd546fc57c33
author Junio C Hamano <gitster@pobox.com> 1234344463 -0800
committer Junio C Hamano <gitster@pobox.com> 1234344592 -0800

revision traversal and pack: notice and die on missing commit

cc0e6c5 (Handle return code of parse_commit in revision machinery,
2007-05-04) attempted to tighten error checking in the revision machinery,
but it wasn't enough.  When get_revision_1() was asked for the next commit
to return, it tries to read and simplify the parents of the commit to be
returned, but an error while doing so was silently ignored and reported as
a truncated history to the caller instead.

This resulted in an early end of "git log" output or a pack that lacks
older commits from "git pack-objects", without any error indication in the
exit status from these commands, even though the underlying parse_commit()
issues an error message to the end user.

Note that the codepath in add_parents_list() that paints parents of an
UNINTERESTING commit UNINTERESTING silently ignores the error when
parse_commit() fails; this is deliberate and in line with aeeae1b
(revision traversal: allow UNINTERESTING objects to be missing,
2009-01-27).

Signed-off-by: Junio C Hamano <gitster@pobox.com>