From 1b9f1f60559979a644cc9cf26f851c4416f20248 Mon Sep 17 00:00:00 2001
From: Vladimir Panteleev <git@cy.md>
Date: Mon, 20 Dec 2021 16:49:59 +0000
Subject: [PATCH] http: Fix CURLOPT_HTTP200ALIASES

The httpcode < 100 check was also triggered when none of the fields were
parsed, thus making the if(!nc) block unreachable.

Closes #8171
---
 lib/http.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/http.c b/lib/http.c
index 1bef121a9c..caa14bbd9d 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -4244,7 +4244,7 @@ CURLcode Curl_http_readwrite_headers(struct Curl_easy *data,
            The sscanf() line above will also allow zero-prefixed and negative
            numbers, so we check for that too here.
         */
-        else if(ISDIGIT(digit4) || (k->httpcode < 100)) {
+        else if(ISDIGIT(digit4) || (nc >= 4 && k->httpcode < 100)) {
           failf(data, "Unsupported response code in HTTP response");
           return CURLE_UNSUPPORTED_PROTOCOL;
         }
-- 
2.47.3