[Webkit-unassigned] [Bug 157078] New: Assertion failure when returning incomplete property descriptor from proxy trap

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=157078

            Bug ID: 157078
           Summary: Assertion failure when returning incomplete property
                    descriptor from proxy trap
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: andre.bargull at gmail.com

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


The following test case triggers this assertion error:
---
ASSERTION FAILED: value
---


Test case:
---
Object.getOwnPropertyDescriptor(new Proxy({a:0}, { getOwnPropertyDescriptor(t,pk){return {writable:true, enumerable:true, configurable:true}} }), "")
---


Stack trace:
---
#0  0x00007ffff6e289ac in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:322
#1  0x00007ffff6ceb180 in JSC::PropertyDescriptor::setDescriptor (this=0x7fffffffca50, value=..., attributes=0) at ../../Source/JavaScriptCore/runtime/PropertyDescriptor.cpp:116
#2  0x00007ffff6c62064 in JSC::JSObject::getOwnPropertyDescriptor (this=0x7fffaedbf4f0, exec=0x7fffffffcaf0, propertyName=..., descriptor=...) at ../../Source/JavaScriptCore/runtime/JSObject.cpp:2866
#3  0x00007ffff6cd385f in JSC::objectConstructorGetOwnPropertyDescriptor (exec=0x7fffffffcaf0, object=0x7fffaedbf4f0, propertyName=...) at ../../Source/JavaScriptCore/runtime/ObjectConstructor.cpp:229
#4  0x00007ffff6cd3c71 in JSC::objectConstructorGetOwnPropertyDescriptor (exec=0x7fffffffcaf0) at ../../Source/JavaScriptCore/runtime/ObjectConstructor.cpp:272
#5  0x00007fffb0bff028 in ?? ()
#6  0x00007fffffffcb60 in ?? ()
#7  0x00007ffff6a33818 in llint_entry () at ../../Source/JavaScriptCore/runtime/JSCJSValueInlines.h:1037
Backtrace stopped: frame did not save the PC
---

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.webkit.org/pipermail/webkit-unassigned/attachments/20160427/47ca72af/attachment.html>