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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion failure or crash when accessing let-variable in TDZ with eval and AnnexB function block hoisting"
href="https://bugs.webkit.org/show_bug.cgi?id=158796">158796</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Assertion failure or crash when accessing let-variable in TDZ with eval and AnnexB function block hoisting
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>WebKit Local Build
</td>
</tr>
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<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>
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<th>Component</th>
<td>JavaScriptCore
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>andre.bargull@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>SVN: rev202088
Build with: perl Tools/Scripts/build-jsc --gtk --debug
The following test case triggers this assertion error:
---
ASSERTION FAILED: returnValue
---
Test case:
---
{ let b = {a: eval("function b(){ return b; }"), b: (1, eval)("(b())")}; }
---
Stack trace:
---
#0 0x00007ffff6de7098 in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:317
#1 0x00007ffff694c7dc in JSC::checkedReturn (returnValue=...) at ../../Source/JavaScriptCore/interpreter/Interpreter.cpp:809
#2 0x00007ffff694f249 in JSC::Interpreter::execute (this=0x7ffff0def058, eval=0x7fffaf1fbe50, callFrame=0x7fffffffcb00, thisValue=..., scope=0x7fffaf1dbfc0)
at ../../Source/JavaScriptCore/interpreter/Interpreter.cpp:1237
#3 0x00007ffff6bd3d41 in JSC::globalFuncEval (exec=0x7fffffffcb00) at ../../Source/JavaScriptCore/runtime/JSGlobalObjectFunctions.cpp:673
...
---
Alternative test case which crashes:
---
{ let {b} = {a: eval("function b(){ return b; }"), b: (1, eval)("print(b())")}; }
---
Stack trace:
---
#0 0x0000000000448df0 in JSC::JSCell::isString (this=0x0) at ../../Source/JavaScriptCore/runtime/JSCellInlines.h:160
#1 0x0000000000449be6 in JSC::JSValue::isString (this=0x7fffffffbe50) at ../../Source/JavaScriptCore/runtime/JSCJSValueInlines.h:553
#2 0x00000000004445d8 in JSC::JSValue::toString (this=0x7fffffffbe50, exec=0x7fffffffbec0) at ../../Source/JavaScriptCore/runtime/JSString.h:765
#3 0x000000000043556f in functionPrint (exec=0x7fffffffbec0) at ../../Source/JavaScriptCore/jsc.cpp:1143
...
---</pre>
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