What will be the output of the following program on GCC compiler by

What will be the output of the following program on GCC compiler by giving command as:-

$ gcc test.c

$ ./a.out

/* test.c */
 #include 
 void fun(int);  
 int main(int argc) {     
   printf("%d ", argc);     
   fun(argc);     
   return 0; 
 } 
 void fun(int i) {     
   if(i!=4){         
     main(++i); 
   }
 } 

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