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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ASSERT(m_stack.last().isTailDeleted) at ShadowChicken.cpp:127 inspecting the inspector"
href="https://bugs.webkit.org/show_bug.cgi?id=156930">156930</a>
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<th>Summary</th>
<td>ASSERT(m_stack.last().isTailDeleted) at ShadowChicken.cpp:127 inspecting the inspector
</td>
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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>WebKit Nightly Build
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<th>Hardware</th>
<td>Unspecified
</td>
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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
</td>
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<th>Component</th>
<td>JavaScriptCore
</td>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>joepeck@webkit.org
</td>
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<th>CC</th>
<td>fpizlo@apple.com, ggaren@apple.com, mark.lam@apple.com
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<pre>* SUMMARY
Assertion when inspecting the inspector.
* STEPS TO REPRODUCE
1. $ defaults write com.apple.Safari WebKitDebugDeveloperExtrasEnabled -bool YES
2. $ run-safari --debug
3. Inspect about:blank
4. Inspect the inspector (Right Click on the toolbar and select Inspect Element)
5. inspector²: Open DebuggerObserver.js
6. inspector²: Set a breakpoint in globalObjectCleared
7. inspector¹: Reload the page => triggers breakpoint in inspector²
8. inspector²: Continue
9. Repeat steps 7 and 8 if needed
=> ASSERT
* ASSERT
ASSERTION FAILED: !m_stack.last().isTailDeleted
/Users/pecoraro/Code/safari/OpenSource/Source/JavaScriptCore/interpreter/ShadowChicken.cpp(127) : void JSC::ShadowChicken::update(JSC::VM &, JSC::ExecState *)
1 0x10a158130 WTFCrash
2 0x109cc6045 JSC::ShadowChicken::update(JSC::VM&, JSC::ExecState*)
3 0x109ba2723 operationProcessShadowChickenLog
4 0x54ddab59107d
5 0x54ddab5aa6bf
6 0x54ddab8f9295
7 0x54ddab573005
8 0x54ddab573026
9 0x54ddab573026
10 0x54ddab573026
11 0x54ddab573026
12 0x109d8311f llint_entry
13 0x109d83199 llint_entry
14 0x109d83199 llint_entry
15 0x109d83199 llint_entry
16 0x109d83199 llint_entry
17 0x109d7c65e vmEntryToJavaScript
18 0x109b8bdea JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
19 0x109b1f1cc JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
20 0x1093fc28e JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
21 0x109bdf4d2 JSC::boundFunctionCall(JSC::ExecState*)
22 0x54ddab401028
23 0x109d83199 llint_entry
24 0x109d83199 llint_entry
25 0x109d7c65e vmEntryToJavaScript
26 0x109b8bdea JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
27 0x109b1f1cc JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
28 0x1093fc28e JSC::call(JSC::ExecState*, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&)
29 0x109a3e4f5 JSC::callSetter(JSC::ExecState*, JSC::JSValue, JSC::JSValue, JSC::JSValue, JSC::ECMAMode)
30 0x109c9622f JSC::JSObject::putInlineSlow(JSC::ExecState*, JSC::PropertyName, JSC::JSValue, JSC::PutPropertySlot&)
31 0x109ba52e8 JSC::JSObject::putInline(JSC::JSCell*, JSC::ExecState*, JSC::PropertyName, JSC::JSValue, JSC::PutPropertySlot&)
ERROR: Exiting process early due to unacknowledged closed-connection</pre>
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