From 8ed2aa8d6dd70b1c32abd3e6f4c4d1a3edcdd434 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Mon, 16 Nov 2020 22:41:19 +0100
Subject: [PATCH] Make sure curl errors without message are shown as code, and
 add URL linked to the failure

---
 src/Composer/Util/Http/CurlDownloader.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Composer/Util/Http/CurlDownloader.php b/src/Composer/Util/Http/CurlDownloader.php
index 8bdce78d6..5fe3a86fc 100644
--- a/src/Composer/Util/Http/CurlDownloader.php
+++ b/src/Composer/Util/Http/CurlDownloader.php
@@ -299,7 +299,7 @@ class CurlDownloader
             try {
                 // TODO progress
                 if (CURLE_OK !== $errno || $error) {
-                    throw new TransportException($error);
+                    throw new TransportException('curl error while downloading '.Url::sanitize($progress['url']).': '.($error ?: '#'.$errno));
                 }
 
                 $statusCode = $progress['http_code'];