send-email: fix threaded mails without chain-reply-to

diff --git a/diff.c b/diff.c
index 4d0a5b9ae6f2b5d921a2aae2a03e9a7f1616dc4d..43835d756c2c2c7ec579e1c38804fe33a706944f 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -3596,6 +3596,7 @@ static char *run_textconv(const char *pgm, struct diff_filespec *spec,
        if (start_command(&child) != 0 ||
            strbuf_read(&buf, child.out, 0) < 0 ||
            finish_command(&child) != 0) {
+               strbuf_release(&buf);
                remove_tempfile();
                error("error running textconv command '%s'", pgm);
                return NULL;