show-branch: Be nicer when running in a corrupt repository.

We may end up trying to print a commit we do not actually have but we
know about its existence only because another commit we do have refers
to it.

Signed-off-by: Junio C Hamano <junkio@cox.net>
(cherry picked from b204feab9371040982d2c60611925e7693106c84 commit)

diff --git a/show-branch.c b/show-branch.c
index 262acf5..8cc0755 100644 (file)
--- a/show-branch.c
+++ b/show-branch.c
@@ -196,8 +196,11 @@ static void show_one_commit(struct commit *commit)
 {
        char pretty[128], *cp;
        struct commit_name *name = commit->object.util;
-       pretty_print_commit(CMIT_FMT_ONELINE, commit->buffer, ~0,
-                           pretty, sizeof(pretty));
+       if (commit->object.parsed)
+               pretty_print_commit(CMIT_FMT_ONELINE, commit->buffer, ~0,
+                                   pretty, sizeof(pretty));
+       else
+               strcpy(pretty, "(unavailable)");
        if (!strncmp(pretty, "[PATCH] ", 8))
                cp = pretty + 8;
        else