mergetool: fix running in subdir when rerere enabled

diff --git a/ident.c b/ident.c
index 92c3cca510ab8bfb718e5a3cb07e5871d38ce055..ac4ae02b485637002869b3fc7a78033d7a5b6aec 100644 (file)
--- a/ident.c
+++ b/ident.c
@@ -101,7 +101,7 @@ static int canonical_name(const char *host, struct strbuf *out)
        memset (&hints, '\0', sizeof (hints));
        hints.ai_flags = AI_CANONNAME;
        if (!getaddrinfo(host, NULL, &hints, &ai)) {
-               if (ai && strchr(ai->ai_canonname, '.')) {
+               if (ai && ai->ai_canonname && strchr(ai->ai_canonname, '.')) {
                        strbuf_addstr(out, ai->ai_canonname);
                        status = 0;
                }