irc, 179 bytes

Result

WA

Code [DL]

* main has joined #code
* main changes topic to 'l'
* a has joined #code
<input> Hey, a.
<output> What's your character, a?
<jump> Let's talk about l.
* main has quit IRC (Quit: )

stdin

10110011
10100001
00001010
10101001
11110101
01011011
01000010
00100100
10000111
10111110
10011001
01100000
11100111
00110111
11010010
00010101
00011100
10111011
01010001
11110010
00101101
00000000
00000001
11100011
00111100
10000000
00000110
10011010
01111000
11010100
00000011
11011101
00001101
10001000
11101111
00110101
00011100
01001111
10101011
01000010
00011000
00001111
00100101
10000011
01101001
01001110
11111011
10110001
00100010
11111101

stdout

1*Error* This (un)voiced has already joined. (Line #3 in code.irc)

stderr

PHP Notice:  Undefined index: variables in /home/esolang/interpreters/irc/irc.phps on line 108
PHP Notice:  Undefined variable: kill_channel in /home/esolang/interpreters/irc/irc.phps on line 436
PHP Notice:  Undefined variable: kill_channel in /home/esolang/interpreters/irc/irc.phps on line 436
PHP Notice:  Undefined variable: kill_channel in /home/esolang/interpreters/irc/irc.phps on line 436
PHP Notice:  Undefined variable: kill_channel in /home/esolang/interpreters/irc/irc.phps on line 436
PHP Notice:  Undefined variable: kill_channel in /home/esolang/interpreters/irc/irc.phps on line 436
PHP Notice:  Undefined variable: kill_channel in /home/esolang/interpreters/irc/irc.phps on line 436

strace