LibJS: Handle continue in switch statement unwinding

Libraries/LibJS/AST.cpp

@@ -1899,7 +1899,8 @@ Value SwitchStatement::execute(Interpreter& interpreter, GlobalObject& global_ob
                 return {};
             if (interpreter.vm().should_unwind()) {
                 if (interpreter.vm().should_unwind_until(ScopeType::Continuable, m_label)) {
-                    ASSERT_NOT_REACHED();
+                    // No stop_unwind(), the outer loop will handle that - we just need to break out of the switch/case.
+                    return {};
                 } else if (interpreter.vm().should_unwind_until(ScopeType::Breakable, m_label)) {
                     interpreter.vm().stop_unwind();
                     return {};

Libraries/LibJS/Tests/switch-basic.js

@@ -49,4 +49,22 @@ describe("basic switch tests", () => {
         expect(foo(42)).toBe("return from 'case 42'");
         expect(foo(43)).toBe("return from 'default'");
     });
+
+    test("continue from switch statement", () => {
+        let i = 0;
+        for (; i < 5; ++i) {
+            switch (i) {
+                case 0:
+                    continue;
+                    expect().fail();
+                case 0:
+                    expect().fail();
+                default:
+                    continue;
+                    expect().fail();
+            }
+            expect().fail();
+        }
+        expect(i).toBe(5);
+    });
 });