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-rw-r--r--builtin/merge.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/builtin/merge.c b/builtin/merge.c
index 900bafdb45..2d79e79c5b 100644
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -761,6 +761,8 @@ static void prepare_to_commit(struct commit_list *remoteheads)
struct strbuf msg = STRBUF_INIT;
strbuf_addbuf(&msg, &merge_msg);
strbuf_addch(&msg, '\n');
+ if (squash)
+ BUG("the control must not reach here under --squash");
if (0 < option_edit)
strbuf_commented_addf(&msg, _(merge_editor_comment), comment_line_char);
write_file_buf(git_path_merge_msg(), msg.buf, msg.len);