Synopsis

Memory is allocated and then freed without being used.

Enabled by default

Yes

Severity/Certainty

Medium/Medium

Full description

Memory is allocated and then freed without being used. This is probably unintentional and might indicate a copy-paste error.

Coding standards

This check does not correspond to any coding standard rules.

Code examples

The following code example fails the check and will give a warning:

#include <stdlib.h>
void example(void) {
  int *p = malloc(sizeof(int));
  free(p);
}

The following code example passes the check and will not give a warning about this issue:

#include <stdlib.h>
int * foo() {
  return (int *) 0xF0000000;
}
void example(void) {
  int *p = malloc(sizeof(int));
  *p = 1;
  free(p);
  p = foo();
  free(p);
}