c-gcc, 79 bytes

Result

WA

Code [DL]

i;main(n,x){for(;1;printf("%d",!n))for(n=strtol(x=gets(&n),i=0,2);n>0;n-=i++);}

stdin

01001110
01011011
11100111
00010001
00000110
00000011
10111110
00000000
11011110
10001000
00110111
00011100
11001011
10010010
11111110
01101101
00000110
01010101
01011101
10101011
00100100
00001010
10011111
00110111
01110111
01100111
11001111
10010001
10011001
10011100
00011001
10010100
00010000
11110011
01101001
00001111
01111000
10101100
11101111
00101101
00100010
11111010
11011011
11111101
11010010
01000010
01101000
00000001
10110000
00010101

stdout

stderr

/tmp/code.c:1:1: warning: data definition has no type or storage class
 i;main(n,x){for(;1;printf("%d",!n))for(n=strtol(x=gets(&n),i=0,2);n>0;n-=i++);}
 ^
/tmp/code.c:1:1: warning: type defaults to ‘int’ in declaration of ‘i’ [-Wimplicit-int]
/tmp/code.c:1:3: warning: return type defaults to ‘int’ [-Wimplicit-int]
 i;main(n,x){for(;1;printf("%d",!n))for(n=strtol(x=gets(&n),i=0,2);n>0;n-=i++);}
   ^
/tmp/code.c: In function ‘main’:
/tmp/code.c:1:3: warning: type of ‘n’ defaults to ‘int’ [-Wimplicit-int]
/tmp/code.c:1:3: warning: type of ‘x’ defaults to ‘int’ [-Wimplicit-int]
/tmp/code.c:1:20: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]
 i;main(n,x){for(;1;printf("%d",!n))for(n=strtol(x=gets(&n),i=0,2);n>0;n-=i++);}
                    ^
/tmp/code.c:1:20: warning: incompatible implicit declaration of built-in function ‘printf’
/tmp/code.c:1:20: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’
/tmp/code.c:1:42: warning: implicit declaration of function ‘strtol’ [-Wimplicit-function-declaration]
 i;main(n,x){for(;1;printf("%d",!n))for(n=strtol(x=gets(&n),i=0,2);n>0;n-=i++);}
                                          ^
/tmp/code.c:1:51: warning: implicit declaration of function ‘gets’ [-Wimplicit-function-declaration]
 i;main(n,x){for(;1;printf("%d",!n))for(n=strtol(x=gets(&n),i=0,2);n>0;n-=i++);}
                                                   ^
/tmp/ccXmVPpn.o: In function `main':
code.c:(.text.startup+0x22): warning: the `gets' function is dangerous and should not be used.
/home/esolang/bin/c-gcc: line 6:    13 Done                    cat -
        14 Segmentation fault      (core dumped) | /tmp/code

strace