v8/test/mjsunit/compiler/switch-bailout.js

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// Flags: --allow-natives-syntax

// Test that bailing out of the optimized compilation doesn't mess with
// the labels in the AST.
function f(x) {
  switch (x) {
    case "foo": return 87;
    case "bar": return 42;
  }
  return 99;
}

for (var i = 0; i < 5; i++) f("foo");
%OptimizeFunctionOnNextCall(f);
f("foo");
assertEquals(42, f("bar"));