http: warn on curl_multi_add_handle failures

This will be useful for tracking down curl usage errors.

Signed-off-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/http.c b/http.c
index c29ce81..d20e9c1 100644 (file)
--- a/http.c
+++ b/http.c
@@ -709,6 +709,8 @@ int start_active_slot(struct active_request_slot *slot)
 
        if (curlm_result != CURLM_OK &&
            curlm_result != CURLM_CALL_MULTI_PERFORM) {
+               warning("curl_multi_add_handle failed: %s",
+                       curl_multi_strerror(curlm_result));
                active_requests--;
                slot->in_use = 0;
                return 0;