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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - We shouldn't crash if DFG AI proved that something was unreachable on one run but then decided not to prove it in the backend"
href="https://bugs.webkit.org/show_bug.cgi?id=158631">158631</a>
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<th>Summary</th>
<td>We shouldn't crash if DFG AI proved that something was unreachable on one run but then decided not to prove it in the backend
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<th>Classification</th>
<td>Unclassified
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<th>Product</th>
<td>WebKit
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>JavaScriptCore
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>fpizlo@apple.com
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<pre>It's possible that due to concurrency, we invalidate the compilation after the last run of the CFA phase but before the backend. Then, when AI runs during the backend, it might think that some code that was previously thought to be Unreachable is now reachable. We shouldn't crash when this happens.</pre>
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