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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 tata() => 1.5; | |
9 | |
10 // The type propagation in Dart2Js wrongly took the intersection of all incoming | |
11 // types in a loop-phi. In this case the back-edge brought type 'number' which, | |
12 // combined with 'integer' (i = 0) was narrowed to 'integer'. As a result no | |
13 // check was inserted for the list access. | |
14 foo(a) { | |
15 var i; | |
16 if (bar()) { | |
17 // t's desired type is conflicting. Once it is used as array receiver. And | |
18 // once as integer. The backward propagation thus can't decide. | |
19 // The forward declaration, however, will assign type num. | |
20 var t = 0 + tata(); | |
21 i = t; | |
22 if (!bar()) t[0]; | |
23 } else { | |
24 i = 0; | |
25 } | |
26 for (int j = 0; j < 1; j++) { | |
27 // The phi, combining the two 'i's must reach the conclusion that i is of | |
28 // type num and therefore needs a check before accessing the array. | |
29 a[i]; | |
30 } | |
31 } | |
32 | |
33 main() { | |
34 Expect.throws(() => foo([1, 2])); | |
35 } | |
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