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<base href="https://bugs.webkit.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Crashes in WebCore::ElementRuleCollector::matchHostPseudoClassRules"
href="https://bugs.webkit.org/show_bug.cgi?id=164923">164923</a>
</td>
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<tr>
<th>Summary</th>
<td>Crashes in WebCore::ElementRuleCollector::matchHostPseudoClassRules
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>Safari Technology Preview
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>WebCore Misc.
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dieter@komendera.com
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=295144" name="attach_295144" title="crash log">attachment 295144</a> <a href="attachment.cgi?id=295144&action=edit" title="crash log">[details]</a></span>
crash log
I get a lot of those crashes when interacting with Issues and Pull Requests on Github.com
Actions on GitHub issues I often, but not always, get this crash:
* assign an issue or pull request to one or multiple collaborators
* assign tags to an issue or pull request
* add a comment to an issue or pull request
I think these crashes started to happen with Safari Technology Preview Release 16.
The still happens with Release 18 (Safari 10.1, WebKit 12603.1.12) on macOS 10.12.1 (16B2555)
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 com.apple.WebCore 0x000000010a6956b0 WebCore::ElementRuleCollector::matchHostPseudoClassRules(WebCore::MatchRequest&, WebCore::StyleResolver::RuleRange&) + 240
1 com.apple.WebCore 0x000000010a17f062 WebCore::ElementRuleCollector::matchAuthorRules(bool) + 194
2 com.apple.WebCore 0x000000010a17ede2 WebCore::ElementRuleCollector::matchAllRules(bool, bool) + 626
3 com.apple.WebCore 0x000000010b1a5004 WebCore::StyleResolver::styleForElement(WebCore::Element const&, WebCore::RenderStyle const*, WebCore::RuleMatchingBehavior, WebCore::RenderRegion const*, WebCore::SelectorFilter const*) + 932
4 com.apple.WebCore 0x000000010a68caf0 WebCore::Element::resolveStyle(WebCore::RenderStyle const*) + 96
5 com.apple.WebCore 0x000000010a60d297 WebCore::Document::styleForElementIgnoringPendingStylesheets(WebCore::Element&, WebCore::RenderStyle const*) + 71
6 com.apple.WebCore 0x000000010a690f58 WebCore::Element::resolveComputedStyle() + 696
7 com.apple.WebCore 0x000000010a1ca9a2 WebCore::Element::computedStyle(WebCore::PseudoId) + 194</pre>
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