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LibJS: Do not coerce nullish references to unresolvable references

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These are not strictly unresolvable references. Treating them as such
fails an assertion in the `delete UnaryExpression` semantic (which is
Reference::delete_ in our implementation) - we enter the unresolvable,
branch, which then asserts that the [[Strict]] slot of the reference is
false.
This commit is contained in:
Timothy Flynn 2023-07-06 16:18:17 -04:00 • committed by Linus Groh
parent f57310999d
commit 2b19d1b5ab
Notes: sideshowbarker 2024-07-17 07:43:05 +09:00
2 changed files with 11 additions and 6 deletions
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11
Userland/Libraries/LibJS/Tests/operators/delete-basic.js
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@ -87,6 +87,12 @@ test("deleting super property", () => {
}
}
class C {
static foo() {
delete super.bar;
}
}
const obj = new B();
expect(() => {
obj.bar();
@ -95,6 +101,11 @@ test("deleting super property", () => {
expect(() => {
obj.baz();
}).toThrowWithMessage(ReferenceError, "Can't delete a property on 'super'");
Object.setPrototypeOf(C, null);
expect(() => {
C.foo();
}).toThrowWithMessage(ReferenceError, "Can't delete a property on 'super'");
});
test("deleting an object computed property coerces the object to a property key", () => {