https://github.com/curl/curl/commit/db3e7a24b5339860fb91cf0d932e8ae13a01e472
From: Daniel Stenberg <daniel@haxx.se>
Date: Fri, 4 Apr 2025 12:34:09 +0200
Subject: [PATCH] hostip: show the correct name on proxy resolve error

Regression, probably from 8ded8e5f3f4b6586399 (#16451)

Fixes #16958
Reported-by: Jean-Christophe Amiel
Closes #16961
--- a/lib/hostip.c
+++ b/lib/hostip.c
@@ -1494,25 +1494,21 @@ CURLcode Curl_once_resolved(struct Curl_easy *data, bool *protocol_done)
 #ifdef USE_CURL_ASYNC
 CURLcode Curl_resolver_error(struct Curl_easy *data)
 {
-  const char *host_or_proxy;
-  CURLcode result;
+  struct connectdata *conn = data->conn;
+  const char *host_or_proxy = "host";
+  const char *name = conn->host.dispname;
+  CURLcode result = CURLE_COULDNT_RESOLVE_HOST;
 
 #ifndef CURL_DISABLE_PROXY
-  struct connectdata *conn = data->conn;
-  if(conn->bits.httpproxy) {
+  if(conn->bits.proxy) {
     host_or_proxy = "proxy";
     result = CURLE_COULDNT_RESOLVE_PROXY;
+    name = conn->socks_proxy.host.name ? conn->socks_proxy.host.dispname :
+      conn->http_proxy.host.dispname;
   }
-  else
 #endif
-  {
-    host_or_proxy = "host";
-    result = CURLE_COULDNT_RESOLVE_HOST;
-  }
-
-  failf(data, "Could not resolve %s: %s", host_or_proxy,
-        data->conn->host.dispname);
 
+  failf(data, "Could not resolve %s: %s", host_or_proxy, name);
   return result;
 }
 #endif /* USE_CURL_ASYNC */