retry: return error if rewind was necessary but didn't happen

Fixes #2801
Closes #2812

diff --git a/lib/multi.c b/lib/multi.c
index 70a406078fdb3aaebfe908b042389b333981f0bc..ee8be39714af0a5a32011406fa9d35797da6b0a8 100644 (file)
--- a/lib/multi.c
+++ b/lib/multi.c
@@ -1949,6 +1949,8 @@ static CURLMcode multi_runsingle(struct Curl_multi *multi,
         CURLcode ret = Curl_retry_request(data->easy_conn, &newurl);
         if(!ret)
           retry = (newurl)?TRUE:FALSE;
+        else if(!result)
+          result = ret;
 
         if(retry) {
           /* if we are to retry, set the result to OK and consider the