mailinfo: avoid violating strbuf assertion

diff --git a/builtin-merge.c b/builtin-merge.c
index e78fa18b3a68e2b7f041beab0524ce1a2b7e9365..dde0c7ed33118ff8d0cc421e8a0366e342c6d011 100644 (file)
--- a/builtin-merge.c
+++ b/builtin-merge.c
@@ -396,12 +396,12 @@ static void merge_name(const char *remote, struct strbuf *msg)
                struct strbuf truname = STRBUF_INIT;
                strbuf_addstr(&truname, "refs/heads/");
                strbuf_addstr(&truname, remote);
-               strbuf_setlen(&truname, len+11);
+               strbuf_setlen(&truname, truname.len - len);
                if (resolve_ref(truname.buf, buf_sha, 0, 0)) {
                        strbuf_addf(msg,
                                    "%s\t\tbranch '%s'%s of .\n",
                                    sha1_to_hex(remote_head->sha1),
-                                   truname.buf,
+                                   truname.buf + 11,
                                    (early ? " (early part)" : ""));
                        return;
                }