url: handle unparsable serialized URLs in setters

src/node_url.cc

@@ -443,8 +443,12 @@ void BindingData::Update(const FunctionCallbackInfo<Value>& args) {
   Utf8Value new_value(isolate, args[2].As<String>());
 
   std::string_view new_value_view = new_value.ToStringView();
+  // A serialized URL is not always reparsable: the IDNA encoder can emit a
+  // host label that the decoder rejects. Fail the update instead of crashing.
   auto out = ada::parse<ada::url_aggregator>(input.ToStringView());
-  CHECK(out);
+  if (!out) {
+    return args.GetReturnValue().Set(false);
+  }
 
   bool result{true};
 

test/parallel/test-whatwg-url-custom-setters.js

@@ -39,6 +39,32 @@ const additionalTestCases =
   }
 }
 
+// The parser can produce a serialization it rejects when parsing it back: a
+// Unicode host encodes to an `xn--xn--` label that the punycode decoder turns
+// down. Setters reparse `href`, so the failure must not take the process down.
+// Implementations backed by ICU accept that label, and ada does too as of
+// https://github.com/ada-url/idna/pull/72, so this URL round-trips once that
+// lands here and the setters below apply as usual.
+test(function() {
+  const url = new URL('http:\u{1F600}xn-');
+  const setters = {
+    hostname: 'example.com',
+    host: 'example.com:8080',
+    protocol: 'https:',
+    pathname: '/path',
+    search: '?search',
+    hash: '#hash',
+    port: '8080',
+    username: 'username',
+    password: 'password',
+  };
+
+  for (const [property, value] of Object.entries(setters)) {
+    url[property] = value;
+    assert_equals(typeof url.href, 'string', `Setting ${property} does not crash`);
+  }
+}, 'URL: setting properties with an unparsable serialized URL');
+
 {
   const url = new URL('http://example.com/');
   const obj = {