Bug 157084 – Assertion failure for exception in "prototype" property getter 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:
---
ASSERTION FAILED: !exec->hadException()
---


Test case:
---
var bf = (function(){}).bind(); Object.defineProperty(bf, "prototype", { get() { throw Error() } }); Reflect.construct(Array, [], bf)
---


Stack trace:
---
#0  0x00007ffff6e289ac in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:322
#1  0x00007ffff6bbf1cb in JSC::InternalFunction::createSubclassStructure (exec=0x7fffffffc800, newTarget=..., baseClass=0x7fffaedf4380) at ../../Source/JavaScriptCore/runtime/InternalFunction.cpp:113
#2  0x0000000000447887 in JSC::JSGlobalObject::arrayStructureForIndexingTypeDuringAllocation (this=0x7fffaede7900, exec=0x7fffffffc800, indexingType=3 '\003', newTarget=...)
    at ../../Source/JavaScriptCore/runtime/JSGlobalObject.h:506
#3  0x00000000004478c5 in JSC::JSGlobalObject::arrayStructureForProfileDuringAllocation (this=0x7fffaede7900, exec=0x7fffffffc800, profile=0x0, newTarget=...)
    at ../../Source/JavaScriptCore/runtime/JSGlobalObject.h:510
#4  0x00007ffff600afb9 in JSC::constructArray (exec=0x7fffffffc800, profile=0x0, globalObject=0x7fffaede7900, values=..., newTarget=...) at ../../Source/JavaScriptCore/runtime/JSGlobalObject.h:766
#5  0x00007ffff6b2efd6 in JSC::constructArrayWithSizeQuirk (exec=0x7fffffffc800, args=..., newTarget=...) at ../../Source/JavaScriptCore/runtime/ArrayConstructor.cpp:101
#6  0x00007ffff6b2f03c in JSC::constructWithArrayConstructor (exec=0x7fffffffc800) at ../../Source/JavaScriptCore/runtime/ArrayConstructor.cpp:107
#7  0x00007ffff6a2da0a in vmEntryToNative () at ../../Source/JavaScriptCore/runtime/Butterfly.h:58
#8  0x00007ffff6998ae5 in JSC::Interpreter::executeConstruct (this=0x7ffff0def058, callFrame=0x7fffffffcae0, constructor=0x7fffaedbbe00, constructType=<incomplete type>, constructData=..., args=..., 
    newTarget=...) at ../../Source/JavaScriptCore/interpreter/Interpreter.cpp:1090
#9  0x00007ffff6b8a3ac in JSC::construct (exec=0x7fffffffcae0, constructorObject=..., constructType=<incomplete type>, constructData=..., args=..., newTarget=...)
    at ../../Source/JavaScriptCore/runtime/ConstructData.cpp:52
#10 0x00007ffff6cfbbd8 in JSC::reflectObjectConstruct (exec=0x7fffffffcae0) at ../../Source/JavaScriptCore/runtime/ReflectObject.cpp:130
#11 0x00007fffb0bff028 in ?? ()
#12 0x00007fffffffcb60 in ?? ()
#13 0x00007ffff6a33818 in llint_entry () at ../../Source/JavaScriptCore/runtime/Butterfly.h:58
---

[Yusuke Suzuki]

As of r196966, createSubclassStructure is allowed to throw any exceptions.
So, let's drop this assertion and return if there is some exceptions.

http://trac.webkit.org/changeset/196966

[Yusuke Suzuki]

Created attachment 277724 [details]
Patch

[Mark Lam]

Comment on attachment 277724 [details]
Patch

r=me

[Yusuke Suzuki]

Comment on attachment 277724 [details]
Patch

Thanks!

[WebKit Commit Bot]

Comment on attachment 277724 [details]
Patch

Clearing flags on attachment: 277724

Committed r200257: <http://trac.webkit.org/changeset/200257>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.