程序因
scanf()
函数处的分段错误而停止。
int main() {
int x = 0;
printf("$ ");
scanf("%i", x);
return 0;
}
GDB 返回以下错误:
(gdb) run
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff71f6794 in _IO_vfscanf_internal (s=<optimized out>, format=<optimized out>, argptr=argptr@entry=0x7fffffffe608, errp=errp@entry=0x0) at vfscanf.c:1902
1902 vfscanf.c: No such file or directory.
我尝试在互联网上搜索 vfscanf.c 但没有找到太多有用的信息。
程序是用g++编译的,g++(与GDB相同)是新更新的。
scanf("%i", &x);
// ^ THIS IS THE IMPORTANT BIT
gcc 甚至告诉你这一点:
foo.c: In function ‘main’:
foo.c:6:9: warning: format ‘%i’ expects argument of type ‘int *’, but argument 2 has type ‘int’ [-Wformat=]
scanf("%i", x);
^
vfscanf.c: No such file or directory
只是gdb抱怨它找不到scanf
的源代码。