Bug 157081 – Assertion failure for bound function with custom prototype and Reflect.construct

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[André Bargull]

SVN: rev200124
Build with: perl Tools/Scripts/build-jsc --gtk --debug


The following test case triggers this assertion error:
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ASSERTION FAILED: prototype != baseStructure->storedPrototype()
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Test case:
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Reflect.construct(Array, [], Object.defineProperty(function(){}.bind(), "prototype", {value: Array.prototype}));
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Stack trace:
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#0  0x00007ffff6e289ac in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:322
#1  0x00007ffff6bbf328 in JSC::InternalFunctionAllocationProfile::createAllocationStructureFromBase (this=0x7fffaedb3ea0, vm=..., owner=0x7fffaedb3e80, prototype=0x7fffaedd36a0, 
    baseStructure=0x7fffaedf4380) at ../../Source/JavaScriptCore/bytecode/InternalFunctionAllocationProfile.h:50
#2  0x00007ffff6bbf443 in JSC::FunctionRareData::createInternalFunctionAllocationStructureFromBase (this=0x7fffaedb3e80, vm=..., prototype=0x7fffaedd36a0, baseStructure=0x7fffaedf4380)
    at ../../Source/JavaScriptCore/runtime/FunctionRareData.h:90
#3  0x00007ffff6bbf200 in JSC::InternalFunction::createSubclassStructure (exec=0x7fffffffc800, newTarget=..., baseClass=0x7fffaedf4380) at ../../Source/JavaScriptCore/runtime/InternalFunction.cpp:115
#4  0x0000000000447887 in JSC::JSGlobalObject::arrayStructureForIndexingTypeDuringAllocation (this=0x7fffaede7900, exec=0x7fffffffc800, indexingType=3 '\003', newTarget=...)
    at ../../Source/JavaScriptCore/runtime/JSGlobalObject.h:506
#5  0x00000000004478c5 in JSC::JSGlobalObject::arrayStructureForProfileDuringAllocation (this=0x7fffaede7900, exec=0x7fffffffc800, profile=0x0, newTarget=...)
    at ../../Source/JavaScriptCore/runtime/JSGlobalObject.h:510
#6  0x00007ffff600afb9 in JSC::constructArray (exec=0x7fffffffc800, profile=0x0, globalObject=0x7fffaede7900, values=..., newTarget=...) at ../../Source/JavaScriptCore/runtime/JSGlobalObject.h:766
#7  0x00007ffff6b2efd6 in JSC::constructArrayWithSizeQuirk (exec=0x7fffffffc800, args=..., newTarget=...) at ../../Source/JavaScriptCore/runtime/ArrayConstructor.cpp:101
#8  0x00007ffff6b2f03c in JSC::constructWithArrayConstructor (exec=0x7fffffffc800) at ../../Source/JavaScriptCore/runtime/ArrayConstructor.cpp:107
#9  0x00007ffff6a2da0a in vmEntryToNative () at ../../Source/JavaScriptCore/runtime/Butterfly.h:58
#10 0x00007ffff6998ae5 in JSC::Interpreter::executeConstruct (this=0x7ffff0def058, callFrame=0x7fffffffcae0, constructor=0x7fffaedbbe00, constructType=<incomplete type>, constructData=..., args=..., 
    newTarget=...) at ../../Source/JavaScriptCore/interpreter/Interpreter.cpp:1090
#11 0x00007ffff6b8a3ac in JSC::construct (exec=0x7fffffffcae0, constructorObject=..., constructType=<incomplete type>, constructData=..., args=..., newTarget=...)
    at ../../Source/JavaScriptCore/runtime/ConstructData.cpp:52
#12 0x00007ffff6cfbbd8 in JSC::reflectObjectConstruct (exec=0x7fffffffcae0) at ../../Source/JavaScriptCore/runtime/ReflectObject.cpp:130
#13 0x00007fffb0bff028 in ?? ()
#14 0x00007fffffffcb60 in ?? ()
#15 0x00007ffff6a33818 in llint_entry () at ../../Source/JavaScriptCore/runtime/Butterfly.h:58
Backtrace stopped: frame did not save the PC
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[Radar WebKit Bug Importer]

<rdar://problem/26010086>

[Yusuke Suzuki]

This assertion is incorrect. We ensured newTarget != exec->callee(). But it does not guarantee that newTarget.[[Prototype]] != exec->callee().[[Prototype]].

[Yusuke Suzuki]

Created attachment 277807 [details]
Patch

[Saam Barati]

Comment on attachment 277807 [details]
Patch

r=me

[WebKit Commit Bot]

Comment on attachment 277807 [details]
Patch

Clearing flags on attachment: 277807

Committed r200319: <http://trac.webkit.org/changeset/200319>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.