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deps/v8/test/mjsunit/turboshaft/maglev-frontend/not-initialized-let-in-switch.js

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+// Copyright 2024 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --turbolev --turbofan
+
+function ref_err_if_hole(x) {
+  switch (x) {
+    case 0:
+      let v = 17;
+    case 1:
+      return v;
+  }
+}
+
+%PrepareFunctionForOptimization(ref_err_if_hole);
+assertEquals(17, ref_err_if_hole(0));
+%OptimizeFunctionOnNextCall(ref_err_if_hole);
+assertEquals(17, ref_err_if_hole(0));
+
+assertThrows(() => ref_err_if_hole(1), ReferenceError,
+            "Cannot access 'v' before initialization");
+assertOptimized(ref_err_if_hole);