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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - REGRESSION: Mac debug EWS bots freeze"
href="https://bugs.webkit.org/show_bug.cgi?id=156750">156750</a>
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<th>Summary</th>
<td>REGRESSION: Mac debug EWS bots freeze
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>Other
</td>
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>Tools / Tests
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>ap@webkit.org
</td>
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<th>CC</th>
<td>dino@apple.com, graouts@apple.com, lforschler@apple.com, ryanhaddad@apple.com, simon.fraser@apple.com
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<pre>Mac Debug EWS bots have started to all freeze, this already happened twice in two days.
We must have made a change in WebKit that kills graphics, as the problem is that WindowServer hangs.
+ 9732 CGXServer (in CoreGraphics) + 839 [0x7fff99d962db]
+ 9732 CGXRunOneServicesPass (in CoreGraphics) + 155 [0x7fff99d95a81]
+ 9732 run_timer_pass (in CoreGraphics) + 412 [0x7fff99c28fc6]
+ 9732 update_display_callback (in CoreGraphics) + 59 [0x7fff99e308fc]
+ 9732 MPDisplayDeviceSurfaceIsReady (in CoreGraphics) + 114 [0x7fff99dd29f7]
+ 9732 IOAccelSurfaceControl (in IOKit) + 74 [0x7fff955a0329]
+ 9732 IOConnectCallScalarMethod (in IOKit) + 111 [0x7fff95595c52]
+ 9732 io_connect_method (in IOKit) + 381 [0x7fff955f216c]
+ 9732 mach_msg (in libsystem_kernel.dylib) + 55 [0x7fff96f8d64f]
+ 9732 mach_msg_trap (in libsystem_kernel.dylib) + 10 [0x7fff96f8e4de]</pre>
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