BESEN wrong behavior of the logical && and || operators

besen-logicaloperators.js

// BESEN wrong behavior of the logical && and || operators
// Tested on r111

var obj = {};

// Logical AND operator
print(obj && obj);       // prints true, expected '[object Object]'
print(obj && 'foo');     // prints '[object Object]', expected 'foo' 
print(obj && 4);         // prints '[object Object]', expected 4 
print(obj && NaN);       // prints false, expected NaN
print(NaN && 0);         // prints 0, expected NaN
print(NaN && NaN);       // prints false, expected NaN
print(obj && true);      // prints false, expected true
print(obj && undefined); // prints false, expected undefined
print(obj && null);      // prints false, expected null
print(obj && false);     // prints false, Ok
print(obj && 0);         // prints 0, Ok

// Logical OR operator
print(obj || obj);       // prints true, expected '[object Object]'
print(obj || 'foo');     // prints 'foo', expected '[object Object]' 
print(obj || 4);         // prints '4', expected '[object Object]'
print(obj || NaN);       // prints true, expected '[object Object]'
print(NaN || 0);         // prints NaN, expected 0
print(NaN || NaN);       // prints false, expected NaN
print(obj || true);      // prints true, expected '[object Object]'
print(obj || undefined); // prints true, expected '[object Object]'
print(obj || null);      // prints true, expected '[object Object]'
print(obj || 0);         // prints '[object Object]', Ok
print(obj || false);     // prints [object Object], Ok