LanguageFeatures/nnbd/flow-analysis/reachability_continue_A01_t07.dart

/*
 * Copyright (c) 2020, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion Continue statement: If N is a statement of the form continue [L];
 * then:
 *
 *  Let S be the statement targeted by the continue. If L is not present, this
 *  is the innermost do, for, or while statement. Otherwise it is the do, for,
 *  or while statement with a label matching L, or the switch statement
 *  containing a switch case with a label matching L.
 *
 *  Update continue(S) = join(continue(S), before(N)).
 *
 *  Let after(N) = unreachable(before(N)).
 *
 * @description Checks reachability after continue statement. Test for-in loop
 * and a label. The outer loop is while
 *
 * @author sgrekhov@unipro.ru
 * @issue 42045
 */
// Requirements=nnbd-strong
import "../../../Utils/expect.dart";

main() {
  late int i;
  int j = 0;
  outerLoop:
  while (j++ < 3) {
    for (;;) {
      continue outerLoop;
      i = 42; // Variable is initialized in a dead code
    }
  }
  try {
    // 'i' is treated here by flow analysis as possibly assigned, so it is a
    // runtime (not a compile time) error to read it
    i;
    Expect.fail("Error expected");
  } on Error {
    // Ok, expected
  }
}