reduce_heads: fix memory leaks
We currently have seven callers of `reduce_heads(foo)`. Six of them do
not use the original list `foo` again, and actually, all six of those
end up leaking it.
Introduce and use `reduce_heads_replace(&foo)` as a leak-free version of
`foo = reduce_heads(foo)` to fix several of these. Fix the remaining
leaks using `free_commit_list()`.
While we're here, document `reduce_heads()` and mark it as `extern`.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/commit.c b/builtin/commit.c
index d75b380..11c4740 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -1728,7 +1728,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
allow_fast_forward = 0;
}
if (allow_fast_forward)
- parents = reduce_heads(parents);
+ reduce_heads_replace(&parents);
} else {
if (!reflog_msg)
reflog_msg = (whence == FROM_CHERRY_PICK)
