From 8128a17e714049c446e60b3f20d7f903c392b398 Mon Sep 17 00:00:00 2001
From: Yedaya Katsman <yedaya.ka@gmail.com>
Date: Sun, 22 Jun 2025 16:02:28 +0300
Subject: [PATCH] rustls: don't try printing the not provided file
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Caught by gcc (Ubuntu 12.3.0-1ubuntu1~22.04) 12.3.0:
```
vtls/rustls.c: In function ‘cr_connect’:
vtls/rustls.c:857:61: warning: ‘%s’ directive argument is null [-Wformat-overflow=]
  857 |     failf(data, "rustls: must provide certificate with key '%s'",
      |                                                             ^~
```

Closes #17704
---
 lib/vtls/rustls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vtls/rustls.c b/lib/vtls/rustls.c
index 24f646078d..ca318d5f4e 100644
--- a/lib/vtls/rustls.c
+++ b/lib/vtls/rustls.c
@@ -855,7 +855,7 @@ init_config_builder_client_auth(struct Curl_easy *data,
   }
   else if(!conn_config->clientcert && ssl_config->key) {
     failf(data, "rustls: must provide certificate with key '%s'",
-          conn_config->clientcert);
+          ssl_config->key);
     return CURLE_SSL_CERTPROBLEM;
   }