From cb3abe58c28f2db1262d51437d15f1c8725d97d3 Mon Sep 17 00:00:00 2001
From: Pierre Tachoire <pierre@lightpanda.io>
Date: Tue, 9 Jan 2024 16:52:28 +0100
Subject: [PATCH] dom: attr: fix crash w/o parent

---
 src/netsurf.zig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/netsurf.zig b/src/netsurf.zig
index 88565df7..d105fbc9 100644
--- a/src/netsurf.zig
+++ b/src/netsurf.zig
@@ -863,6 +863,11 @@ pub fn attributeGetValue(a: *Attribute) !?[]const u8 {
 }
 
 pub fn attributeSetValue(a: *Attribute, v: []const u8) !void {
+    // if the attribute has no owner/parent, the function crashes.
+    if (try attributeGetOwnerElement(a) == null) {
+        return DOMError.NotSupported;
+    }
+
     const err = attributeVtable(a).dom_attr_set_value.?(a, try strFromData(v));
     try DOMErr(err);
 }