LibJS: Reset scheduled-jump flag when throwing an exception

Otherwise we might attempt to follow the scheduled jump later

Userland/Libraries/LibJS/Bytecode/Interpreter.cpp

@@ -277,6 +277,7 @@ void Interpreter::run_bytecode()
 
             if (result.is_error()) [[unlikely]] {
                 reg(Register::exception()) = *result.throw_completion().value();
+                m_scheduled_jump = {};
                 auto const* handler = m_current_block->handler();
                 auto const* finalizer = m_current_block->finalizer();
                 if (!handler && !finalizer)

Userland/Libraries/LibJS/Tests/try-finally-break.js

@@ -339,3 +339,25 @@ test("labelled break in finally overrides labelled break in try", () => {
 
     expect(executionOrder).toEqual([1, 2]);
 });
+
+test("Throw while breaking", () => {
+    const executionOrder = [];
+    try {
+        for (const i = 1337; ; expect().fail("Jumped to for loop update block")) {
+            try {
+                executionOrder.push(1);
+                break;
+            } finally {
+                executionOrder.push(2);
+                throw 1;
+            }
+        }
+    } finally {
+        executionOrder.push(3);
+    }
+    expect(() => {
+        i;
+    }).toThrowWithMessage(ReferenceError, "'i' is not defined");
+
+    expect(executionOrder).toEqual([1, 2, 3]);
+});