<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>314005</bug_id>
          
          <creation_ts>2026-05-04 12:46:35 -0700</creation_ts>
          <short_desc>[Site Isolation] navigate-to-unparseable-url.html fails</short_desc>
          <delta_ts>2026-05-07 15:55:13 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>New Bugs</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Ryosuke Niwa">rniwa</reporter>
          <assigned_to name="Ryosuke Niwa">rniwa</assigned_to>
          <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>2207319</commentid>
    <comment_count>0</comment_count>
    <who name="Ryosuke Niwa">rniwa</who>
    <bug_when>2026-05-04 12:46:35 -0700</bug_when>
    <thetext>navigate-to-unparseable-url.html fails under --site-isolation hitting a debug assertion as follows:

ASSERTION FAILED: !navigation-&gt;currentRequest().isEmpty()
/Volumes/Data/safari-2/OpenSource/Source/WebKit/UIProcess/WebPageProxy.cpp(5887) : auto WebKit::WebPageProxy::continueNavigationInNewProcess(API::Navigation &amp;, WebFrameProxy &amp;, RefPtr&lt;SuspendedPageProxy&gt; &amp;&amp;, BrowsingContextGroup &amp;, Ref&lt;WebProcessProxy&gt; &amp;&amp;, ProcessSwapRequestedByClient, ShouldTreatAsContinuingLoad, std::optional&lt;NetworkResourceLoadIdentifier&gt;, LoadedWebArchive, NavigationUpgradeToHTTPSBehavior, WebCore::ProcessSwapDisposition, WebsiteDataStore *)::(anonymous class)::operator()()
1   0x131396654 WebKit::WebPageProxy::continueNavigationInNewProcess(API::Navigation&amp;, WebKit::WebFrameProxy&amp;, WTF::RefPtr&lt;WebKit::SuspendedPageProxy, WTF::RawPtrTraits&lt;WebKit::SuspendedPageProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::SuspendedPageProxy&gt;&gt;&amp;&amp;, WebKit::BrowsingContextGroup&amp;, WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::ProcessSwapRequestedByClient, WebCore::ShouldTreatAsContinuingLoad, std::__1::optional&lt;WTF::ObjectIdentifierGeneric&lt;WebKit::NetworkResourceLoadIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits&lt;unsigned long long&gt;, unsigned long long&gt;&gt;, WebKit::LoadedWebArchive, WebCore::NavigationUpgradeToHTTPSBehavior, WebCore::ProcessSwapDisposition, WebKit::WebsiteDataStore*)::$_2::operator()()
2   0x131396210 WTF::Detail::CallableWrapper&lt;WebKit::WebPageProxy::continueNavigationInNewProcess(API::Navigation&amp;, WebKit::WebFrameProxy&amp;, WTF::RefPtr&lt;WebKit::SuspendedPageProxy, WTF::RawPtrTraits&lt;WebKit::SuspendedPageProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::SuspendedPageProxy&gt;&gt;&amp;&amp;, WebKit::BrowsingContextGroup&amp;, WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::ProcessSwapRequestedByClient, WebCore::ShouldTreatAsContinuingLoad, std::__1::optional&lt;WTF::ObjectIdentifierGeneric&lt;WebKit::NetworkResourceLoadIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits&lt;unsigned long long&gt;, unsigned long long&gt;&gt;, WebKit::LoadedWebArchive, WebCore::NavigationUpgradeToHTTPSBehavior, WebCore::ProcessSwapDisposition, WebKit::WebsiteDataStore*)::$_2, void&gt;::call()
3   0x12d8b1264 WTF::Function&lt;void ()&gt;::operator()() const
4   0x13129fddc WebKit::WebPageProxy::continueNavigationInNewProcess(API::Navigation&amp;, WebKit::WebFrameProxy&amp;, WTF::RefPtr&lt;WebKit::SuspendedPageProxy, WTF::RawPtrTraits&lt;WebKit::SuspendedPageProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::SuspendedPageProxy&gt;&gt;&amp;&amp;, WebKit::BrowsingContextGroup&amp;, WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::ProcessSwapRequestedByClient, WebCore::ShouldTreatAsContinuingLoad, std::__1::optional&lt;WTF::ObjectIdentifierGeneric&lt;WebKit::NetworkResourceLoadIdentifierType, WTF::ObjectIdentifierMainThreadAccessTraits&lt;unsigned long long&gt;, unsigned long long&gt;&gt;, WebKit::LoadedWebArchive, WebCore::NavigationUpgradeToHTTPSBehavior, WebCore::ProcessSwapDisposition, WebKit::WebsiteDataStore*)
5   0x131391140 WebKit::WebPageProxy::receivedNavigationActionPolicyDecision(WebKit::WebProcessProxy&amp;, WebCore::PolicyAction, API::Navigation&amp;, WTF::Ref&lt;API::NavigationAction, WTF::RawPtrTraits&lt;API::NavigationAction&gt;, WTF::DefaultRefDerefTraits&lt;API::NavigationAction&gt;&gt;&amp;&amp;, WebKit::ProcessSwapRequestedByClient, WebKit::WebFrameProxy&amp;, WebKit::FrameInfoData const&amp;, WebKit::WasNavigationIntercepted, std::__1::optional&lt;WebKit::PolicyDecisionConsoleMessage&gt;&amp;&amp;, WTF::CompletionHandler&lt;void (WebKit::PolicyDecision&amp;&amp;)&gt;&amp;&amp;)::$_0::operator()(WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral)
6   0x131392f34 WTF::Detail::CallableWrapper&lt;WebKit::WebPageProxy::receivedNavigationActionPolicyDecision(WebKit::WebProcessProxy&amp;, WebCore::PolicyAction, API::Navigation&amp;, WTF::Ref&lt;API::NavigationAction, WTF::RawPtrTraits&lt;API::NavigationAction&gt;, WTF::DefaultRefDerefTraits&lt;API::NavigationAction&gt;&gt;&amp;&amp;, WebKit::ProcessSwapRequestedByClient, WebKit::WebFrameProxy&amp;, WebKit::FrameInfoData const&amp;, WebKit::WasNavigationIntercepted, std::__1::optional&lt;WebKit::PolicyDecisionConsoleMessage&gt;&amp;&amp;, WTF::CompletionHandler&lt;void (WebKit::PolicyDecision&amp;&amp;)&gt;&amp;&amp;)::$_0, void, WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral&gt;::call(WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral)
7   0x1315264f8 WTF::Function&lt;void (WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral)&gt;::operator()(WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral) const
8   0x1314b6018 WTF::CompletionHandler&lt;void (WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral)&gt;::operator()(WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral)
9   0x1315277d0 WebKit::WebProcessPool::prepareProcessForNavigation(WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::WebPageProxy&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral, WebKit::WebProcessProxy::IsolatedProcessType, WebCore::Site const&amp;, WebCore::Site const&amp;, API::Navigation const&amp;, WebKit::WebProcessProxy::LockdownMode, WebKit::EnhancedSecurity, WebKit::LoadedWebArchive, WTF::Ref&lt;WebKit::WebsiteDataStore, WTF::RawPtrTraits&lt;WebKit::WebsiteDataStore&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebsiteDataStore&gt;&gt;&amp;&amp;, WTF::CompletionHandler&lt;void (WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral)&gt;&amp;&amp;, unsigned int)::$_0::operator()(WebKit::SuspendedPageProxy*)
10  0x131527424 WebKit::WebProcessPool::prepareProcessForNavigation(WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::WebPageProxy&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral, WebKit::WebProcessProxy::IsolatedProcessType, WebCore::Site const&amp;, WebCore::Site const&amp;, API::Navigation const&amp;, WebKit::WebProcessProxy::LockdownMode, WebKit::EnhancedSecurity, WebKit::LoadedWebArchive, WTF::Ref&lt;WebKit::WebsiteDataStore, WTF::RawPtrTraits&lt;WebKit::WebsiteDataStore&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebsiteDataStore&gt;&gt;&amp;&amp;, WTF::CompletionHandler&lt;void (WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral)&gt;&amp;&amp;, unsigned int)::$_1::operator()()
11  0x1315272c4 WTF::Detail::CallableWrapper&lt;WebKit::WebProcessPool::prepareProcessForNavigation(WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::WebPageProxy&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral, WebKit::WebProcessProxy::IsolatedProcessType, WebCore::Site const&amp;, WebCore::Site const&amp;, API::Navigation const&amp;, WebKit::WebProcessProxy::LockdownMode, WebKit::EnhancedSecurity, WebKit::LoadedWebArchive, WTF::Ref&lt;WebKit::WebsiteDataStore, WTF::RawPtrTraits&lt;WebKit::WebsiteDataStore&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebsiteDataStore&gt;&gt;&amp;&amp;, WTF::CompletionHandler&lt;void (WTF::Ref&lt;WebKit::WebProcessProxy, WTF::RawPtrTraits&lt;WebKit::WebProcessProxy&gt;, WTF::DefaultRefDerefTraits&lt;WebKit::WebProcessProxy&gt;&gt;&amp;&amp;, WebKit::SuspendedPageProxy*, WTF::ASCIILiteral)&gt;&amp;&amp;, unsigned int)::$_1, void&gt;::call()</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2207322</commentid>
    <comment_count>1</comment_count>
    <who name="Ryosuke Niwa">rniwa</who>
    <bug_when>2026-05-04 12:52:52 -0700</bug_when>
    <thetext>Pull request: https://github.com/WebKit/WebKit/pull/64199</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2208765</commentid>
    <comment_count>2</comment_count>
    <who name="EWS">ews-feeder</who>
    <bug_when>2026-05-07 15:54:25 -0700</bug_when>
    <thetext>Committed 312837@main (f89549a90a5d): &lt;https://commits.webkit.org/312837@main&gt;

Reviewed commits have been landed. Closing PR #64199 and removing active labels.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2208766</commentid>
    <comment_count>3</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2026-05-07 15:55:13 -0700</bug_when>
    <thetext>&lt;rdar://problem/176503118&gt;</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>