[PATCH] commit parsing: replace unchecked parse_commit by parse_commit_or_die

[Stefan Beller <sbeller@google.com>]

The reason parse_commit() would fail at these points would be because
the repository is corrupt.

This was noticed by coverity.

Signed-off-by: Stefan Beller <sbeller@google.com>
---

 developed on pu as that's where coverity spotted it.
 I have no overview if these areas are being worked on. (It may clash
 with at least jc/merge-base-fp-only)
 
 Thanks,
 Stefan

 builtin/blame.c       | 2 +-
 builtin/describe.c    | 4 ++--
 builtin/name-rev.c    | 2 +-
 builtin/show-branch.c | 4 ++--
 commit.c              | 2 +-
 fetch-pack.c          | 2 +-
 6 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/builtin/blame.c b/builtin/blame.c
index 992a79c..3b8564c 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -1801,7 +1801,7 @@ static void assign_blame(struct scoreboard *sb, int opt)
 		 * so hold onto it in the meantime.
 		 */
 		origin_incref(suspect);
-		parse_commit(commit);
+		parse_commit_or_die(commit);
 		if (reverse ||
 		    (!(commit->object.flags & UNINTERESTING) &&
 		     !(revs->max_age != -1 && commit->date < revs->max_age)))
diff --git a/builtin/describe.c b/builtin/describe.c
index 01490a1..8299b16 100644
--- a/builtin/describe.c
+++ b/builtin/describe.c
@@ -199,7 +199,7 @@ static unsigned long finish_depth_computation(
 			best->depth++;
 		while (parents) {
 			struct commit *p = parents->item;
-			parse_commit(p);
+			parse_commit_or_die(p);
 			if (!(p->object.flags & SEEN))
 				commit_list_insert_by_date(p, list);
 			p->object.flags |= c->object.flags;
@@ -322,7 +322,7 @@ static void describe(const char *arg, int last_one)
 		}
 		while (parents) {
 			struct commit *p = parents->item;
-			parse_commit(p);
+			parse_commit_or_die(p);
 			if (!(p->object.flags & SEEN))
 				commit_list_insert_by_date(p, &list);
 			p->object.flags |= c->object.flags;
diff --git a/builtin/name-rev.c b/builtin/name-rev.c
index cd89d48..92c3316 100644
--- a/builtin/name-rev.c
+++ b/builtin/name-rev.c
@@ -29,7 +29,7 @@ static void name_rev(struct commit *commit,
 	struct commit_list *parents;
 	int parent_number = 1;
 
-	parse_commit(commit);
+	parse_commit_or_die(commit);
 
 	if (commit->date < cutoff)
 		return;
diff --git a/builtin/show-branch.c b/builtin/show-branch.c
index 974f340..fd911b5 100644
--- a/builtin/show-branch.c
+++ b/builtin/show-branch.c
@@ -218,7 +218,7 @@ static void join_revs(struct commit_list **list_p,
 			parents = parents->next;
 			if ((this_flag & flags) == flags)
 				continue;
-			parse_commit(p);
+			parse_commit_or_die(p);
 			if (mark_seen(p, seen_p) && !still_interesting)
 				extra--;
 			p->object.flags |= flags;
@@ -835,7 +835,7 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
 		if (!commit)
 			die(_("cannot find commit %s (%s)"),
 			    ref_name[num_rev], oid_to_hex(&revkey));
-		parse_commit(commit);
+		parse_commit_or_die(commit);
 		mark_seen(commit, &seen);
 
 		/* rev#0 uses bit REV_SHIFT, rev#1 uses bit REV_SHIFT+1,
diff --git a/commit.c b/commit.c
index b9c0c81..5b23eaf 100644
--- a/commit.c
+++ b/commit.c
@@ -910,7 +910,7 @@ static void mark_redundant(struct commit **array, int cnt)
 	ALLOC_ARRAY(filled_index, cnt - 1);
 
 	for (i = 0; i < cnt; i++)
-		parse_commit(array[i]);
+		parse_commit_or_die(array[i]);
 	for (i = 0; i < cnt; i++) {
 		struct commit_list *common;
 
diff --git a/fetch-pack.c b/fetch-pack.c
index cb45c34..8b4ab47 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -159,7 +159,7 @@ static const unsigned char *get_rev(void)
 			return NULL;
 
 		commit = prio_queue_get(&rev_list);
-		parse_commit(commit);
+		parse_commit_or_die(commit);
 		parents = commit->parents;
 
 		commit->object.flags |= POPPED;
-- 
2.10.1.448.g862ec83.dirty