[Webkit-unassigned] [Bug 168605] New: ASSERTION FAILED: "!scope.exception()" with Object.isSealed/isFrozen and uninitialized module bindings

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=168605

            Bug ID: 168605
           Summary: ASSERTION FAILED: "!scope.exception()" with
                    Object.isSealed/isFrozen and uninitialized module
                    bindings
    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

Revision: 212634

Test case, t.js:
---
import* as self from "./t.js";

Object.isSealed(self);

Object.isFrozen(self);

export let a;
export function b(){}
---

Triggers this assertion:
---
ASSERTION FAILED: !scope.exception()
../../Source/JavaScriptCore/runtime/JSModuleNamespaceObject.cpp(130) : static bool JSC::JSModuleNamespaceObject::getOwnPropertySlot(JSC::JSObject*, JSC::ExecState*, JSC::PropertyName, JSC::PropertySlot&)
---

Stacktrace:
---
#0  0x00007ffff6dc6f98 in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:323
#1  0x00007ffff6bc9856 in JSC::JSModuleNamespaceObject::getOwnPropertySlot (cell=0x7fffaef88110, exec=0x7fffffffca10, propertyName=..., slot=...)
    at ../../Source/JavaScriptCore/runtime/JSModuleNamespaceObject.cpp:130
#2  0x00007ffff6be471d in JSC::JSObject::getOwnPropertyDescriptor (this=0x7fffaef88110, exec=0x7fffffffca10, propertyName=..., descriptor=...) at ../../Source/JavaScriptCore/runtime/JSObject.cpp:3187
#3  0x00007ffff6c626b3 in JSC::objectConstructorIsSealed (exec=0x7fffffffca10) at ../../Source/JavaScriptCore/runtime/ObjectConstructor.cpp:642
...
---

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