307431 2026-02-10 06:05:12 -0800 Navigating with the Layers inspector tab open breaks the visualization 2026-05-01 09:43:17 -0700 1 1 1 Unclassified WebKit Web Inspector WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 aperez rcaliman a_panta inspector-bugzilla-changes rcaliman webkit-bug-importer oldest_to_newest 2179834 0 aperez 2026-02-10 06:05:12 -0800 Steps to reproduce: 1. run-minibrowser --wpe https://blogs.igalia.com/webkit/ 2. Open the Inspector with Ctrl+Shift+I 3. In the inspector window, open the “Layers” tab 4. Click the “About” link at the top of the page Expected outcome: The “Layers” tab updates itself with the contents of the newly loaded page. Actual outcome: The “Layers” tab remains empty and no longer updates. The following errors are written to the standard error stream: resource:///org/webkit/inspector/UserInterface/Controllers/ConsoleManager.js:241:27: CONSOLE ASSERT ERROR resource:///org/webkit/inspector/UserInterface/Base/Main.js:3131:22: CONSOLE ERROR Error: Layer has zero size This affects both the “main” branch and the “webkitglib/2.50” one. 2179839 1 aperez 2026-02-10 06:23:19 -0800 (In reply to Adrian Perez from comment #0) > This affects both the “main” branch and the “webkitglib/2.50” one. This should read: the “main” branch and the “webkitglib/2.52” one. 2180201 2 aperez 2026-02-11 00:25:12 -0800 As a workaround, if the “Layers” tab gets stuck like this, closing the inspector and reopening it again works (but it's an annoyance). 2180212 3 aperez 2026-02-11 01:09:39 -0800 The empty size error comes from InspectorLayerTreeAgent::requestContent(), defined in Source/WebCore/inspector/agents/InspectorLayerTreeAgent.cpp: Inspector::CommandResult<String> InspectorLayerTreeAgent::requestContent(const Inspector::Protocol::LayerTree::LayerId& layerId) { // ... FloatSize layerSize = graphicsLayer->size(); if (layerSize.isEmpty()) return makeUnexpected("Layer has zero size"_s); // ... } 2183565 4 webkit-bug-importer 2026-02-20 15:29:32 -0800 <rdar://problem/170836910> 2206252 5 rcaliman 2026-04-30 07:37:41 -0700 This affects the macOS build of Web Inspector as well. It's not isolated to GTK/WPE. The root cause is a race condition during page reload/navigation. 2206256 6 rcaliman 2026-04-30 08:15:37 -0700 Pull request: https://github.com/WebKit/WebKit/pull/63972 2206587 7 ews-feeder 2026-05-01 09:43:15 -0700 Committed 312435@main (95810670932e): <https://commits.webkit.org/312435@main> Reviewed commits have been landed. Closing PR #63972 and removing active labels.