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     27 
     28 // Test that we always use original Intl.Constructors for toLocaleString calls.
     29 
     30 function throwError() {
     31   throw new Error('Malicious method invoked.');
     32 }
     33 
     34 Intl.Collator = Intl.NumberFormat = Intl.DateTimeFormat = throwError;
     35 
     36 Intl.Collator.prototype.compare = throwError;
     37 Intl.NumberFormat.prototype.format = throwError;
     38 Intl.DateTimeFormat.prototype.format = throwError;
     39 
     40 // Make sure constructors actually throw now.
     41 assertThrows('new Intl.Collator()');
     42 assertThrows('new Intl.NumberFormat()');
     43 assertThrows('new Intl.DateTimeFormat()');
     44 
     45 // None of these should throw.
     46 assertDoesNotThrow('new Date().toLocaleString()');
     47 assertDoesNotThrow('new Date().toLocaleDateString()');
     48 assertDoesNotThrow('new Date().toLocaleTimeString()');
     49 assertDoesNotThrow('new Number(12345.412).toLocaleString()');
     50 assertDoesNotThrow('new String(\'abc\').localeCompare(\'bcd\')');
     51