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Side by Side Diff: tests/language/src/ListDoubleIndexInLoopTest.dart

Issue 10248007: test rename overhaul: step 8 - language tests (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 8 years, 7 months ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file.
4 // Dart test program for testing arrays.
5
6 bar() => true;
7
8 // The type propagation in Dart2Js wrongly took the intersection of all incoming
9 // types in a loop-phi. In this case the back-edge brought type 'number' which,
10 // combined with 'integer' (i = 0) was narrowed to 'integer'. As a result no
11 // check was inserted for the list access.
12 foo(a) {
13 var i = 0;
14 while (true) {
15 if (i > 1) return a[i];
16 if (bar()) {
17 // Adding a double guarantees a double result. Therefore guard by an if.
18 i = i + 1.5;
19 }
20 }
21 }
22
23 main() {
24 Expect.throws(() => foo([1, 2]));
25 }
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