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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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