306508 2026-01-29 00:42:10 -0800 Uncaught Exception: Uncaught TypeError: this._contentViewsForTarget.getOrInsert is not a function 2026-02-09 07:24:00 -0800 1 1 1 Unclassified WebKit Web Inspector WebKit Nightly Build PC Windows 11 RESOLVED INVALID https://bugs.webkit.org/show_bug.cgi?id=306234 InRadar P2 Normal --- 1 dennysmart503402 webkit-unassigned inspector-bugzilla-changes rcaliman webkit-bug-importer oldest_to_newest 2176109 0 dennysmart503402 2026-01-29 00:42:10 -0800 Uncaught Exception in Web Inspector. Steps to Reproduce: 1. What were you doing? Include setup or other preparations to reproduce the exception. 2. Include explicit, accurate, and minimal steps taken. Do not include extraneous or irrelevant steps. 3. What did you expect to have happen? What actually happened? Uncaught Exceptions: ----------------------- - Uncaught TypeError: this._contentViewsForTarget.getOrInsert is not a function (at ScriptClusterTimelineView.js:171:56) ? @ TypeError: this._contentViewsForTarget.getOrInsert is not a function ? @ ScriptClusterTimelineView.js:171:56) ? @ ScriptClusterTimelineView.js:64:14) ? @ ContentView.js:87:24) ? @ TimelineRecordingContentView.js:685:60) ? @ TimelineRecordingContentView.js:121:18) ? @ ContentView.js:76:20) ? @ ContentView.js:220:45) ? @ ContentViewContainer.js:68:31) ? @ ContentBrowser.js:162:43) ? @ TimelineTabContentView.js:651:58) ----------------------- Notes: Inspected URL: (unknown) Loading completed: false Frontend User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36 2176188 1 rcaliman 2026-01-29 07:57:47 -0800 Likely caused by https://bugs.webkit.org/show_bug.cgi?id=306234 but it shouldn't if https://bugs.webkit.org/show_bug.cgi?id=306233 was also in the same build. This is logged as a Windows bug. Is this a different port of WebKit? Can you please share details about how this occurs? 2178289 2 webkit-bug-importer 2026-02-05 00:43:13 -0800 <rdar://problem/169691059> 2179444 3 rcaliman 2026-02-09 07:24:00 -0800 > Frontend User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36 This looks like it's running Web Inspector frontend in Chrome 144. `Map.prototype.getOrInsert` is enabled as of Chrome 145. This PR comment is relevant: https://github.com/WebKit/WebKit/pull/57224#issuecomment-3799804594