From ed735091574122fd5b2f5bac1edc56d5f03aa969 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Fri, 27 Sep 2019 15:10:49 +0200
Subject: setopt: handle ALTSVC set to NULL

---
 lib/setopt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/setopt.c b/lib/setopt.c
index 7058a249c..f2006cbf4 100644
--- a/lib/setopt.c
+++ b/lib/setopt.c
@@ -2725,7 +2725,8 @@ CURLcode Curl_vsetopt(struct Curl_easy *data, CURLoption option, va_list param)
     result = Curl_setstropt(&data->set.str[STRING_ALTSVC], argptr);
     if(result)
       return result;
-    (void)Curl_altsvc_load(data->asi, argptr);
+    if(argptr)
+      (void)Curl_altsvc_load(data->asi, argptr);
     break;
   case CURLOPT_ALTSVC_CTRL:
     if(!data->asi) {
-- 
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