[PATCH 11/12] repo_get_merge_bases_many_dirty(): pass on errors from `merge_bases_many()`

["Johannes Schindelin via GitGitGadget" <gitgitgadget@xxxxxxxxx>]

From: Johannes Schindelin <johannes.schindelin@xxxxxx>

The `merge_bases_many()` function was just taught to indicate parsing
errors, and now the `repo_get_merge_bases_many_dirty()` function is
aware of that, too.

Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
 builtin/merge-base.c |  7 ++++---
 commit-reach.c       | 16 ++++++----------
 commit-reach.h       |  7 ++++---
 3 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/builtin/merge-base.c b/builtin/merge-base.c
index 6faabfb6698..2b6af1bc35b 100644
--- a/builtin/merge-base.c
+++ b/builtin/merge-base.c
@@ -13,10 +13,11 @@
 
 static int show_merge_base(struct commit **rev, int rev_nr, int show_all)
 {
-	struct commit_list *result, *r;
+	struct commit_list *result = NULL, *r;
 
-	result = repo_get_merge_bases_many_dirty(the_repository, rev[0],
-						 rev_nr - 1, rev + 1);
+	if (repo_get_merge_bases_many_dirty(the_repository, rev[0],
+					    rev_nr - 1, rev + 1, &result) < 0)
+		return -1;
 
 	if (!result)
 		return 1;
diff --git a/commit-reach.c b/commit-reach.c
index f0006ab6422..25b39c302a8 100644
--- a/commit-reach.c
+++ b/commit-reach.c
@@ -460,17 +460,13 @@ int repo_get_merge_bases_many(struct repository *r,
 	return get_merge_bases_many_0(r, one, n, twos, 1, result);
 }
 
-struct commit_list *repo_get_merge_bases_many_dirty(struct repository *r,
-						    struct commit *one,
-						    int n,
-						    struct commit **twos)
+int repo_get_merge_bases_many_dirty(struct repository *r,
+				    struct commit *one,
+				    int n,
+				    struct commit **twos,
+				    struct commit_list **result)
 {
-	struct commit_list *result = NULL;
-	if (get_merge_bases_many_0(r, one, n, twos, 0, &result) < 0) {
-		free_commit_list(result);
-		return NULL;
-	}
-	return result;
+	return get_merge_bases_many_0(r, one, n, twos, 0, result);
 }
 
 int repo_get_merge_bases(struct repository *r,
diff --git a/commit-reach.h b/commit-reach.h
index 458043f4d58..bf63cc468fd 100644
--- a/commit-reach.h
+++ b/commit-reach.h
@@ -18,9 +18,10 @@ int repo_get_merge_bases_many(struct repository *r,
 			      struct commit **twos,
 			      struct commit_list **result);
 /* To be used only when object flags after this call no longer matter */
-struct commit_list *repo_get_merge_bases_many_dirty(struct repository *r,
-						    struct commit *one, int n,
-						    struct commit **twos);
+int repo_get_merge_bases_many_dirty(struct repository *r,
+				    struct commit *one, int n,
+				    struct commit **twos,
+				    struct commit_list **result);
 
 int get_octopus_merge_bases(struct commit_list *in, struct commit_list **result);
 
-- 
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