LibJS: Don't coerce this value to an object in Function.prototype.call

Author: https://github.com/Lubrsi
Commit: 1bfbc0b6af
Pull-request: https://github.com/SerenityOS/serenity/pull/12404
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibJS/Tests/builtins/Function/Function.prototype.call.js

@@ -51,3 +51,19 @@ test("basic functionality", () => {
 
     expect((() => this).call("foo")).toBe(globalThis);
 });
+
+describe("errors", () => {
+    test("does not accept non-function values", () => {
+        expect(() => {
+            Function.prototype.call.call("foo");
+        }).toThrowWithMessage(TypeError, "foo is not a function");
+
+        expect(() => {
+            Function.prototype.call.call(undefined);
+        }).toThrowWithMessage(TypeError, "undefined is not a function");
+
+        expect(() => {
+            Function.prototype.call.call(null);
+        }).toThrowWithMessage(TypeError, "null is not a function");
+    });
+});