node, 47 bytes

Result

WA

Code [DL]

for(i=0;i<50;i++)a.on('data',n=>console.log(n))

stdin

00101101
10101011
01011011
01000010
00010011
10011001
01011000
01111000
11111111
01010111
11111101
10011111
10001011
10001000
10101111
10110101
10111000
00001011
00001111
11101100
00000010
01101001
10110100
00110101
00000000
01001110
11111101
10111110
00000001
10100110
11010010
00011100
00101100
01100110
11110001
00011111
10011010
00000110
00010101
00000011
01100100
00100100
00001010
10100010
00110111
01101110
11100111
10001101
01011011
00101010

stdout

stderr

/volume/CODE:1
(function (exports, require, module, __filename, __dirname) { for(i=0;i<50;i++)a.on('data',n=>console.log(n))
                                                                               ^

ReferenceError: a is not defined
    at Object.<anonymous> (/volume/CODE:1:80)
    at Module._compile (module.js:573:30)
    at Object.Module._extensions..js (module.js:584:10)
    at Module.load (module.js:507:32)
    at tryModuleLoad (module.js:470:12)
    at Function.Module._load (module.js:462:3)
    at Function.Module.runMain (module.js:609:10)
    at startup (bootstrap_node.js:158:16)
    at bootstrap_node.js:598:3

strace