source: CIVL/mods/dev.civl.com/examples/library/civlc/freeBad2.cvl@ a8a5acb

#include <civlc.cvh>

void main(){
  int * a = (int*) $malloc($here, sizeof(int));
 
  $free(NULL);
  $free(a);
  $free(a); //a has already been deallocated and the call is error prone.
}