mergetools/meld: make usage of `--output` configurable and more robust

diff --git a/sha1_name.c b/sha1_name.c
index 5bfa8416999d35d6bb5c615d86763f013b7df748..63ee66fedd617e2cacfae7a763f43ee600d15273 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -540,8 +540,10 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
                        char *tmp = xstrndup(str + at + 2, reflog_len);
                        at_time = approxidate_careful(tmp, &errors);
                        free(tmp);
-                       if (errors)
+                       if (errors) {
+                               free(real_ref);
                                return -1;
+                       }
                }
                if (read_ref_at(real_ref, at_time, nth, sha1, NULL,
                                &co_time, &co_tz, &co_cnt)) {
@@ -946,7 +948,7 @@ static int interpret_nth_prior_checkout(const char *name, int namelen,
        retval = 0;
        if (0 < for_each_reflog_ent_reverse("HEAD", grab_nth_branch_switch, &cb)) {
                strbuf_reset(buf);
-               strbuf_add(buf, cb.buf.buf, cb.buf.len);
+               strbuf_addbuf(buf, &cb.buf);
                retval = brace - name + 1;
        }