Using the commit-graph file to walk commit history removes the large
cost of parsing commits during the walk. This exposes a performance
issue: lookup_tree() takes a large portion of the computation time,
even when Git never uses those trees.
In anticipation of lazy-loading these trees, rename the 'tree' member
of struct commit to 'maybe_tree'. This serves two purposes: it hints
at the future role of possibly being NULL even if the commit has a
valid tree, and it allows for unambiguous transformation from simple
member access (i.e. commit->maybe_tree) to method access.
Signed-off-by: Derrick Stolee <dstolee@xxxxxxxxxxxxx>
---
blame.c | 18 +++++++++---------
builtin/checkout.c | 12 ++++++------
builtin/diff.c | 2 +-
builtin/fast-export.c | 6 +++---
builtin/log.c | 4 ++--
builtin/reflog.c | 2 +-
commit-graph.c | 4 ++--
commit.c | 2 +-
commit.h | 2 +-
fsck.c | 6 +++---
http-push.c | 2 +-
line-log.c | 4 ++--
list-objects.c | 10 +++++-----
log-tree.c | 6 +++---
merge-recursive.c | 5 +++--
notes-merge.c | 8 ++++----
packfile.c | 2 +-
pretty.c | 4 ++--
ref-filter.c | 2 +-
revision.c | 8 ++++----
sequencer.c | 12 ++++++------
sha1_name.c | 2 +-
tree.c | 4 ++--
walker.c | 2 +-
24 files changed, 65 insertions(+), 64 deletions(-)
diff --git a/blame.c b/blame.c
index 200e0ad9a2..b78e649cac 100644
--- a/blame.c
+++ b/blame.c
@@ -553,10 +553,10 @@ static struct blame_origin *find_origin(struct commit *parent,
diff_setup_done(&diff_opts);
if (is_null_oid(&origin->commit->object.oid))
- do_diff_cache(&parent->tree->object.oid, &diff_opts);
+ do_diff_cache(&parent->maybe_tree->object.oid, &diff_opts);
else
- diff_tree_oid(&parent->tree->object.oid,
- &origin->commit->tree->object.oid,
+ diff_tree_oid(&parent->maybe_tree->object.oid,
+ &origin->commit->maybe_tree->object.oid,
"", &diff_opts);
diffcore_std(&diff_opts);
@@ -622,10 +622,10 @@ static struct blame_origin *find_rename(struct commit *parent,
diff_setup_done(&diff_opts);
if (is_null_oid(&origin->commit->object.oid))
- do_diff_cache(&parent->tree->object.oid, &diff_opts);
+ do_diff_cache(&parent->maybe_tree->object.oid, &diff_opts);
else
- diff_tree_oid(&parent->tree->object.oid,
- &origin->commit->tree->object.oid,
+ diff_tree_oid(&parent->maybe_tree->object.oid,
+ &origin->commit->maybe_tree->object.oid,
"", &diff_opts);
diffcore_std(&diff_opts);
@@ -1257,10 +1257,10 @@ static void find_copy_in_parent(struct blame_scoreboard *sb,
diff_opts.flags.find_copies_harder = 1;
if (is_null_oid(&target->commit->object.oid))
- do_diff_cache(&parent->tree->object.oid, &diff_opts);
+ do_diff_cache(&parent->maybe_tree->object.oid, &diff_opts);
else
- diff_tree_oid(&parent->tree->object.oid,
- &target->commit->tree->object.oid,
+ diff_tree_oid(&parent->maybe_tree->object.oid,
+ &target->commit->maybe_tree->object.oid,
"", &diff_opts);
if (!diff_opts.flags.find_copies_harder)
diff --git a/builtin/checkout.c b/builtin/checkout.c
index d76e13c852..b15fed5d85 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -484,7 +484,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
resolve_undo_clear();
if (opts->force) {
- ret = reset_tree(new_branch_info->commit->tree, opts, 1, writeout_error);
+ ret = reset_tree(new_branch_info->commit->maybe_tree, opts, 1, writeout_error);
if (ret)
return ret;
} else {
@@ -570,18 +570,18 @@ static int merge_working_tree(const struct checkout_opts *opts,
o.verbosity = 0;
work = write_tree_from_memory(&o);
- ret = reset_tree(new_branch_info->commit->tree, opts, 1,
+ ret = reset_tree(new_branch_info->commit->maybe_tree, opts, 1,
writeout_error);
if (ret)
return ret;
o.ancestor = old_branch_info->name;
o.branch1 = new_branch_info->name;
o.branch2 = "local";
- ret = merge_trees(&o, new_branch_info->commit->tree, work,
- old_branch_info->commit->tree, &result);
+ ret = merge_trees(&o, new_branch_info->commit->maybe_tree, work,
+ old_branch_info->commit->maybe_tree, &result);
if (ret < 0)
exit(128);
- ret = reset_tree(new_branch_info->commit->tree, opts, 0,
+ ret = reset_tree(new_branch_info->commit->maybe_tree, opts, 0,
writeout_error);
strbuf_release(&o.obuf);
if (ret)
@@ -1002,7 +1002,7 @@ static int parse_branchname_arg(int argc, const char **argv,
*source_tree = parse_tree_indirect(rev);
} else {
parse_commit_or_die(new_branch_info->commit);
- *source_tree = new_branch_info->commit->tree;
+ *source_tree = new_branch_info->commit->maybe_tree;
}
if (!*source_tree) /* case (1): want a tree */
diff --git a/builtin/diff.c b/builtin/diff.c
index 16bfb22f73..34f18a5f3f 100644
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -398,7 +398,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
if (!obj)
die(_("invalid object '%s' given."), name);
if (obj->type == OBJ_COMMIT)
- obj = &((struct commit *)obj)->tree->object;
+ obj = &((struct commit *)obj)->maybe_tree->object;
if (obj->type == OBJ_TREE) {
obj->flags |= flags;
diff --git a/builtin/fast-export.c b/builtin/fast-export.c
index 27b2cc138e..91e526b30d 100644
--- a/builtin/fast-export.c
+++ b/builtin/fast-export.c
@@ -578,11 +578,11 @@ static void handle_commit(struct commit *commit, struct rev_info *rev,
get_object_mark(&commit->parents->item->object) != 0 &&
!full_tree) {
parse_commit_or_die(commit->parents->item);
- diff_tree_oid(&commit->parents->item->tree->object.oid,
- &commit->tree->object.oid, "", &rev->diffopt);
+ diff_tree_oid(&commit->parents->item->maybe_tree->object.oid,
+ &commit->maybe_tree->object.oid, "", &rev->diffopt);
}
else
- diff_root_tree_oid(&commit->tree->object.oid,
+ diff_root_tree_oid(&commit->maybe_tree->object.oid,
"", &rev->diffopt);
/* Export the referenced blobs, and remember the marks. */
diff --git a/builtin/log.c b/builtin/log.c
index 94ee177d56..f603b53318 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1067,8 +1067,8 @@ static void make_cover_letter(struct rev_info *rev, int use_stdout,
diff_setup_done(&opts);
- diff_tree_oid(&origin->tree->object.oid,
- &head->tree->object.oid,
+ diff_tree_oid(&origin->maybe_tree->object.oid,
+ &head->maybe_tree->object.oid,
"", &opts);
diffcore_std(&opts);
diff_flush(&opts);
diff --git a/builtin/reflog.c b/builtin/reflog.c
index 4719a5354c..b17eabc009 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -154,7 +154,7 @@ static int commit_is_complete(struct commit *commit)
for (i = 0; i < found.nr; i++) {
struct commit *c =
(struct commit *)found.objects[i].item;
- if (!tree_is_complete(&c->tree->object.oid)) {
+ if (!tree_is_complete(&c->maybe_tree->object.oid)) {
is_incomplete = 1;
c->object.flags |= INCOMPLETE;
}
diff --git a/commit-graph.c b/commit-graph.c
index 1fc63d541b..005b4a753e 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -258,7 +258,7 @@ static int fill_commit_in_graph(struct commit *item, struct commit_graph *g, uin
item->graph_pos = pos;
hashcpy(oid.hash, commit_data);
- item->tree = lookup_tree(&oid);
+ item->maybe_tree = lookup_tree(&oid);
date_high = get_be32(commit_data + g->hash_len + 8) & 0x3;
date_low = get_be32(commit_data + g->hash_len + 12);
@@ -369,7 +369,7 @@ static void write_graph_chunk_data(struct hashfile *f, int hash_len,
uint32_t packedDate[2];
parse_commit(*list);
- hashwrite(f, (*list)->tree->object.oid.hash, hash_len);
+ hashwrite(f, (*list)->maybe_tree->object.oid.hash, hash_len);
parent = (*list)->parents;
diff --git a/commit.c b/commit.c
index 3e39c86abf..fbc092808c 100644
--- a/commit.c
+++ b/commit.c
@@ -335,7 +335,7 @@ int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long s
if (get_sha1_hex(bufptr + 5, parent.hash) < 0)
return error("bad tree pointer in commit %s",
oid_to_hex(&item->object.oid));
- item->tree = lookup_tree(&parent);
+ item->maybe_tree = lookup_tree(&parent);
bufptr += tree_entry_len + 1; /* "tree " + "hex sha1" + "\n" */
pptr = &item->parents;
diff --git a/commit.h b/commit.h
index e57ae4b583..c4d6e6e064 100644
--- a/commit.h
+++ b/commit.h
@@ -22,7 +22,7 @@ struct commit {
unsigned int index;
timestamp_t date;
struct commit_list *parents;
- struct tree *tree;
+ struct tree *maybe_tree;
uint32_t graph_pos;
};
diff --git a/fsck.c b/fsck.c
index 5c8c12dde3..3228ca5bee 100644
--- a/fsck.c
+++ b/fsck.c
@@ -396,9 +396,9 @@ static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_optio
name = get_object_name(options, &commit->object);
if (name)
- put_object_name(options, &commit->tree->object, "%s:", name);
+ put_object_name(options, &commit->maybe_tree->object, "%s:", name);
- result = options->walk((struct object *)commit->tree, OBJ_TREE, data, options);
+ result = options->walk((struct object *)commit->maybe_tree, OBJ_TREE, data, options);
if (result < 0)
return result;
res = result;
@@ -772,7 +772,7 @@ static int fsck_commit_buffer(struct commit *commit, const char *buffer,
err = fsck_ident(&buffer, &commit->object, options);
if (err)
return err;
- if (!commit->tree) {
+ if (!commit->maybe_tree) {
err = report(options, &commit->object, FSCK_MSG_BAD_TREE, "could not load commit's tree %s", sha1_to_hex(tree_sha1));
if (err)
return err;
diff --git a/http-push.c b/http-push.c
index 7dcd9daf62..d83479f32f 100644
--- a/http-push.c
+++ b/http-push.c
@@ -1330,7 +1330,7 @@ static int get_delta(struct rev_info *revs, struct remote_lock *lock)
int count = 0;
while ((commit = get_revision(revs)) != NULL) {
- p = process_tree(commit->tree, p);
+ p = process_tree(commit->maybe_tree, p);
commit->object.flags |= LOCAL;
if (!(commit->object.flags & UNINTERESTING))
count += add_send_request(&commit->object, lock);
diff --git a/line-log.c b/line-log.c
index cdc2257db5..e714969ca2 100644
--- a/line-log.c
+++ b/line-log.c
@@ -817,8 +817,8 @@ static void queue_diffs(struct line_log_data *range,
assert(commit);
DIFF_QUEUE_CLEAR(&diff_queued_diff);
- diff_tree_oid(parent ? &parent->tree->object.oid : NULL,
- &commit->tree->object.oid, "", opt);
+ diff_tree_oid(parent ? &parent->maybe_tree->object.oid : NULL,
+ &commit->maybe_tree->object.oid, "", opt);
if (opt->detect_rename) {
filter_diffs_for_paths(range, 1);
if (diff_might_be_rename())
diff --git a/list-objects.c b/list-objects.c
index 168bef688a..bfd09f545c 100644
--- a/list-objects.c
+++ b/list-objects.c
@@ -195,7 +195,7 @@ static void mark_edge_parents_uninteresting(struct commit *commit,
struct commit *parent = parents->item;
if (!(parent->object.flags & UNINTERESTING))
continue;
- mark_tree_uninteresting(parent->tree);
+ mark_tree_uninteresting(parent->maybe_tree);
if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
parent->object.flags |= SHOWN;
show_edge(parent);
@@ -212,7 +212,7 @@ void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
struct commit *commit = list->item;
if (commit->object.flags & UNINTERESTING) {
- mark_tree_uninteresting(commit->tree);
+ mark_tree_uninteresting(commit->maybe_tree);
if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
commit->object.flags |= SHOWN;
show_edge(commit);
@@ -227,7 +227,7 @@ void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
struct commit *commit = (struct commit *)obj;
if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
continue;
- mark_tree_uninteresting(commit->tree);
+ mark_tree_uninteresting(commit->maybe_tree);
if (!(obj->flags & SHOWN)) {
obj->flags |= SHOWN;
show_edge(commit);
@@ -300,8 +300,8 @@ static void do_traverse(struct rev_info *revs,
* an uninteresting boundary commit may not have its tree
* parsed yet, but we are not going to show them anyway
*/
- if (commit->tree)
- add_pending_tree(revs, commit->tree);
+ if (commit->maybe_tree)
+ add_pending_tree(revs, commit->maybe_tree);
show_commit(commit, show_data);
if (revs->tree_blobs_in_commit_order)
diff --git a/log-tree.c b/log-tree.c
index bdf23c5f7b..99499af57c 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -806,7 +806,7 @@ static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log
return 0;
parse_commit_or_die(commit);
- oid = &commit->tree->object.oid;
+ oid = &commit->maybe_tree->object.oid;
/* Root commit? */
parents = get_saved_parents(opt, commit);
@@ -831,7 +831,7 @@ static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log
* we merged _in_.
*/
parse_commit_or_die(parents->item);
- diff_tree_oid(&parents->item->tree->object.oid,
+ diff_tree_oid(&parents->item->maybe_tree->object.oid,
oid, "", &opt->diffopt);
log_tree_diff_flush(opt);
return !opt->loginfo;
@@ -846,7 +846,7 @@ static int log_tree_diff(struct rev_info *opt, struct commit *commit, struct log
struct commit *parent = parents->item;
parse_commit_or_die(parent);
- diff_tree_oid(&parent->tree->object.oid,
+ diff_tree_oid(&parent->maybe_tree->object.oid,
oid, "", &opt->diffopt);
log_tree_diff_flush(opt);
diff --git a/merge-recursive.c b/merge-recursive.c
index 869092f7b9..67886a4ff8 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -101,7 +101,7 @@ static struct commit *make_virtual_commit(struct tree *tree, const char *comment
struct commit *commit = alloc_commit_node();
set_merge_remote_desc(commit, comment, (struct object *)commit);
- commit->tree = tree;
+ commit->maybe_tree = tree;
commit->object.parsed = 1;
return commit;
}
@@ -2154,7 +2154,8 @@ int merge_recursive(struct merge_options *o,
read_cache();
o->ancestor = "merged common ancestors";
- clean = merge_trees(o, h1->tree, h2->tree, merged_common_ancestors->tree,
+ clean = merge_trees(o, h1->maybe_tree, h2->maybe_tree,
+ merged_common_ancestors->maybe_tree,
&mrtree);
if (clean < 0) {
flush_output(o);
diff --git a/notes-merge.c b/notes-merge.c
index c09c5e0e47..1d3edc8942 100644
--- a/notes-merge.c
+++ b/notes-merge.c
@@ -600,14 +600,14 @@ int notes_merge(struct notes_merge_options *o,
printf("No merge base found; doing history-less merge\n");
} else if (!bases->next) {
base_oid = &bases->item->object.oid;
- base_tree_oid = &bases->item->tree->object.oid;
+ base_tree_oid = &bases->item->maybe_tree->object.oid;
if (o->verbosity >= 4)
printf("One merge base found (%.7s)\n",
oid_to_hex(base_oid));
} else {
/* TODO: How to handle multiple merge-bases? */
base_oid = &bases->item->object.oid;
- base_tree_oid = &bases->item->tree->object.oid;
+ base_tree_oid = &bases->item->maybe_tree->object.oid;
if (o->verbosity >= 3)
printf("Multiple merge bases found. Using the first "
"(%.7s)\n", oid_to_hex(base_oid));
@@ -634,8 +634,8 @@ int notes_merge(struct notes_merge_options *o,
goto found_result;
}
- result = merge_from_diffs(o, base_tree_oid, &local->tree->object.oid,
- &remote->tree->object.oid, local_tree);
+ result = merge_from_diffs(o, base_tree_oid, &local->maybe_tree->object.oid,
+ &remote->maybe_tree->object.oid, local_tree);
if (result != 0) { /* non-trivial merge (with or without conflicts) */
/* Commit (partial) result */
diff --git a/packfile.c b/packfile.c
index b1d33b646a..3eb9c4a36e 100644
--- a/packfile.c
+++ b/packfile.c
@@ -1925,7 +1925,7 @@ static int add_promisor_object(const struct object_id *oid,
struct commit *commit = (struct commit *) obj;
struct commit_list *parents = commit->parents;
- oidset_insert(set, &commit->tree->object.oid);
+ oidset_insert(set, &commit->maybe_tree->object.oid);
for (; parents; parents = parents->next)
oidset_insert(set, &parents->item->object.oid);
} else if (obj->type == OBJ_TAG) {
diff --git a/pretty.c b/pretty.c
index f7ce490230..42095ea495 100644
--- a/pretty.c
+++ b/pretty.c
@@ -1161,10 +1161,10 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
strbuf_addstr(sb, diff_get_color(c->auto_color, DIFF_RESET));
return 1;
case 'T': /* tree hash */
- strbuf_addstr(sb, oid_to_hex(&commit->tree->object.oid));
+ strbuf_addstr(sb, oid_to_hex(&commit->maybe_tree->object.oid));
return 1;
case 't': /* abbreviated tree hash */
- strbuf_add_unique_abbrev(sb, commit->tree->object.oid.hash,
+ strbuf_add_unique_abbrev(sb, commit->maybe_tree->object.oid.hash,
c->pretty_ctx->abbrev);
return 1;
case 'P': /* parent hashes */
diff --git a/ref-filter.c b/ref-filter.c
index 45fc56216a..783a3ee6cf 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -815,7 +815,7 @@ static void grab_commit_values(struct atom_value *val, int deref, struct object
if (deref)
name++;
if (!strcmp(name, "tree")) {
- v->s = xstrdup(oid_to_hex(&commit->tree->object.oid));
+ v->s = xstrdup(oid_to_hex(&commit->maybe_tree->object.oid));
}
else if (!strcmp(name, "numparent")) {
v->value = commit_list_count(commit->parents);
diff --git a/revision.c b/revision.c
index b42c836d7a..7d66e32e83 100644
--- a/revision.c
+++ b/revision.c
@@ -440,8 +440,8 @@ static void file_change(struct diff_options *options,
static int rev_compare_tree(struct rev_info *revs,
struct commit *parent, struct commit *commit)
{
- struct tree *t1 = parent->tree;
- struct tree *t2 = commit->tree;
+ struct tree *t1 = parent->maybe_tree;
+ struct tree *t2 = commit->maybe_tree;
if (!t1)
return REV_TREE_NEW;
@@ -477,7 +477,7 @@ static int rev_compare_tree(struct rev_info *revs,
static int rev_same_tree_as_empty(struct rev_info *revs, struct commit *commit)
{
int retval;
- struct tree *t1 = commit->tree;
+ struct tree *t1 = commit->maybe_tree;
if (!t1)
return 0;
@@ -615,7 +615,7 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
if (!revs->prune)
return;
- if (!commit->tree)
+ if (!commit->maybe_tree)
return;
if (!commit->parents) {
diff --git a/sequencer.c b/sequencer.c
index f9d1001dee..3b2823c8b5 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -499,8 +499,8 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
o.show_rename_progress = 1;
head_tree = parse_tree_indirect(head);
- next_tree = next ? next->tree : empty_tree();
- base_tree = base ? base->tree : empty_tree();
+ next_tree = next ? next->maybe_tree : empty_tree();
+ base_tree = base ? base->maybe_tree : empty_tree();
for (xopt = opts->xopts; xopt != opts->xopts + opts->xopts_nr; xopt++)
parse_merge_opt(&o, *xopt);
@@ -561,7 +561,7 @@ static int is_index_unchanged(void)
return error(_("unable to update cache tree"));
return !oidcmp(&active_cache_tree->oid,
- &head_commit->tree->object.oid);
+ &head_commit->maybe_tree->object.oid);
}
static int write_author_script(const char *message)
@@ -1118,7 +1118,7 @@ static int try_to_commit(struct strbuf *msg, const char *author,
}
if (!(flags & ALLOW_EMPTY) && !oidcmp(current_head ?
- ¤t_head->tree->object.oid :
+ ¤t_head->maybe_tree->object.oid :
&empty_tree_oid, &tree)) {
res = 1; /* run 'git commit' to display error message */
goto out;
@@ -1216,12 +1216,12 @@ static int is_original_commit_empty(struct commit *commit)
if (parse_commit(parent))
return error(_("could not parse parent commit %s"),
oid_to_hex(&parent->object.oid));
- ptree_oid = &parent->tree->object.oid;
+ ptree_oid = &parent->maybe_tree->object.oid;
} else {
ptree_oid = the_hash_algo->empty_tree; /* commit is root */
}
- return !oidcmp(ptree_oid, &commit->tree->object.oid);
+ return !oidcmp(ptree_oid, &commit->maybe_tree->object.oid);
}
/*
diff --git a/sha1_name.c b/sha1_name.c
index 735c1c0b8e..26b22cb628 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -896,7 +896,7 @@ struct object *peel_to_type(const char *name, int namelen,
if (o->type == OBJ_TAG)
o = ((struct tag*) o)->tagged;
else if (o->type == OBJ_COMMIT)
- o = &(((struct commit *) o)->tree->object);
+ o = &(((struct commit *) o)->maybe_tree->object);
else {
if (name)
error("%.*s: expected %s type, but the object "
diff --git a/tree.c b/tree.c
index b224115e0f..dbc5e0be54 100644
--- a/tree.c
+++ b/tree.c
@@ -109,7 +109,7 @@ static int read_tree_1(struct tree *tree, struct strbuf *base,
oid_to_hex(entry.oid),
base->buf, entry.path);
- oidcpy(&oid, &commit->tree->object.oid);
+ oidcpy(&oid, &commit->maybe_tree->object.oid);
}
else
continue;
@@ -248,7 +248,7 @@ struct tree *parse_tree_indirect(const struct object_id *oid)
if (obj->type == OBJ_TREE)
return (struct tree *) obj;
else if (obj->type == OBJ_COMMIT)
- obj = &(((struct commit *) obj)->tree->object);
+ obj = &(((struct commit *) obj)->maybe_tree->object);
else if (obj->type == OBJ_TAG)
obj = ((struct tag *) obj)->tagged;
else
diff --git a/walker.c b/walker.c
index dffb9c8e37..1d5f3059a2 100644
--- a/walker.c
+++ b/walker.c
@@ -87,7 +87,7 @@ static int process_commit(struct walker *walker, struct commit *commit)
walker_say(walker, "walk %s\n", oid_to_hex(&commit->object.oid));
if (walker->get_tree) {
- if (process(walker, &commit->tree->object))
+ if (process(walker, &commit->maybe_tree->object))
return -1;
if (!walker->get_all)
walker->get_tree = 0;
--
2.17.0
