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Always check parse_tree*()'s return value

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Otherwise we may easily run into serious crashes: For example, if we run
`init_tree_desc()` directly after a failed `parse_tree()`, we are
accessing uninitialized data or trying to dereference `NULL`.

Note that the `parse_tree()` function already takes care of showing an
error message. The `parse_tree_indirectly()` and
`repo_get_commit_tree()` functions do not, therefore those latter call
sites need to show a useful error message while the former do not.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2024-02-23 08:34:23 +00:00
committed by Junio C Hamano
parent 98c6d16d67
commit aa9f618909
12 changed files with 52 additions and 10 deletions
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4
cache-tree.c
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@ -779,8 +779,8 @@ static void prime_cache_tree_rec(struct repository *r,
struct cache_tree_sub *sub;
struct tree *subtree = lookup_tree(r, &entry.oid);
if (!subtree->object.parsed)
parse_tree(subtree);
if (!subtree->object.parsed && parse_tree(subtree) < 0)
exit(128);
sub = cache_tree_sub(it, entry.path);
sub->cache_tree = cache_tree();