fclose() 提示No source available for ""

[coolmurder]

DEBUG模式下代码执行到第二个fclose(f);的时候就提示No source available for ""
大家帮忙看下什么原因

#include <stdio.h>

int main()
{
	int len;
	char * buff;

	FILE * f;
	
	f = fopen("/home/config.xml", "rt");
	
	if (!f) 
	{
		fclose(f);
		
		return 1;
	}
	
	fseek(f, 0L, SEEK_END);
	len = ftell(f);
	buff = new char(len);
	fseek(f,0L, SEEK_SET);
	
	fread(buff, len, 1, f);
	
	printf("%s", buff);
	
	fclose(f);
	
	delete[] buff;
	
	return 0;
}

[downmooner]

 if (f==NULL) 
    {
        
        return 1;
    }

buff = new char[len];

[bao001001]

[Quote=引用楼主 coolmurder 的帖子:]
if (!f)
{
fclose(f);

return 1;
}
[/Quote]

fclose(f) has problem because f is null pointer. please check error status after fopen() call.