tree 7fd82703079885e1adb864e8a8f185fdc6b45c8e
parent e230c568c4b9a991e3175e5f65171a566fd8e39c
author Jeff King <peff@peff.net> 1382604756 -0400
committer Junio C Hamano <gitster@pobox.com> 1382654630 -0700

log_tree_diff: die when we fail to parse a commit

We currently call parse_commit and then assume we can
dereference the resulting "tree" struct field. If parsing
failed, however, that field is NULL and we end up
segfaulting.

Instead of a segfault, let's print an error message and die
a little more gracefully.

Note that this should never happen in practice, but may
happen in a corrupt repository.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>