<?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>312252</bug_id>
          
          <creation_ts>2026-04-14 02:24:30 -0700</creation_ts>
          <short_desc>Speculation Rules - race condition with non-OK responses leads to wrong response being served</short_desc>
          <delta_ts>2026-04-17 06:28:13 -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="Yoav Weiss">yoav</reporter>
          <assigned_to name="Yoav Weiss">yoav</assigned_to>
          <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>2200126</commentid>
    <comment_count>0</comment_count>
    <who name="Yoav Weiss">yoav</who>
    <bug_when>2026-04-14 02:24:30 -0700</bug_when>
    <thetext>As seen in https://bugs.webkit.org/show_bug.cgi?id=312221, on onemileatatime.com, clicking links loads blank pages. It looks like the prefetches result in 503 but are being used by navigations when those navigations were initiated before the response arrived.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2200190</commentid>
    <comment_count>1</comment_count>
    <who name="Yoav Weiss">yoav</who>
    <bug_when>2026-04-14 07:11:11 -0700</bug_when>
    <thetext>Pull request: https://github.com/WebKit/WebKit/pull/62733</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2201465</commentid>
    <comment_count>2</comment_count>
    <who name="EWS">ews-feeder</who>
    <bug_when>2026-04-17 06:27:56 -0700</bug_when>
    <thetext>Committed 311445@main (29e582611afa): &lt;https://commits.webkit.org/311445@main&gt;

Reviewed commits have been landed. Closing PR #62733 and removing active labels.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2201466</commentid>
    <comment_count>3</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2026-04-17 06:28:13 -0700</bug_when>
    <thetext>&lt;rdar://problem/175005152&gt;</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>