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			26 lines
		
	
	
		
			469 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			26 lines
		
	
	
		
			469 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
| // Copyright 2017 the V8 project authors. All rights reserved.
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| // Use of this source code is governed by a BSD-style license that can be
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| // found in the LICENSE file.
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| 
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| // Flags: --verify-heap
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| 
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| class Array1 extends Array {
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|   constructor(len) {
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|       super(1);
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|     }
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| };
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| 
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| class MyArray extends Array {
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|   static get [Symbol.species]() {
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|       return Array1;
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|     }
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| }
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| 
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| a = new MyArray();
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| 
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| for (var i = 0; i < 100000; i++) {
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|   a.push(1);
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| }
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| 
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| a.map(function(x) { return 42; });
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