/* try.c */
#include <stdio.h>
#include <stdlib.h>

void foo(double);

int main(void) {

 /* The value assigned to 'd' has no *
  * effect on the warning message.   */
 double d = 0.;
 foo(d);                 
}

void foo(double d) {
 char buf[127];
 sprintf (buf, "%.*g\n", 126, d);
 printf("%s\n", buf);
}


##</code><code>##

try.c: In function ‘foo’:
try.c:17:17: warning: ‘%.*g’ directive writing between 1 and 133 bytes into a region of size 127 [-Wformat-overflow=]
  sprintf (buf, "%.*g", 126, d);
                 ^~~~
try.c:17:16: note: assuming directive output of 132 bytes
  sprintf (buf, "%.*g", 126, d);
                ^~~~~~
try.c:17:2: note: ‘sprintf’ output between 2 and 134 bytes into a destination of size 127
  sprintf (buf, "%.*g", 126, d);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~