c-gcc, 26 bytes

Result

WA

Code [DL]

i;main(){gets(&i);puts();}

stdin

9410654627474343302043147861522757109426909590895260656980696488697941166589630614137679410595643070

stdout

stderr

/tmp/code.c:1:1: warning: data definition has no type or storage class
 i;main(){gets(&i);puts();}
 ^
/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(){gets(&i);puts();}
   ^
/tmp/code.c: In function ‘main’:
/tmp/code.c:1:10: warning: implicit declaration of function ‘gets’ [-Wimplicit-function-declaration]
 i;main(){gets(&i);puts();}
          ^
/tmp/code.c:1:19: warning: implicit declaration of function ‘puts’ [-Wimplicit-function-declaration]
 i;main(){gets(&i);puts();}
                   ^
/tmp/ccoK88DP.o: In function `main':
code.c:(.text.startup+0xc): 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