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/* Spurious uninitialized variable warnings, case 1.

   Taken from cppfiles.c (merge_include_chains) */

/* { dg-do compile } */

/* { dg-options "-Wuninitialized" } */

struct list

{

  struct list *next;

  int id;

};

extern void free (void *);

void remove_dupes (struct list *el)

{

  struct list *p, *q, *r;  /* { dg-bogus "r" "uninitialized variable warning" } */

  for (p = el; p; p = p->next)

  {

    for (q = el; q != p; q = q->next)

      if (q->id == p->id)

      {

        r->next = p->next;

        free (p);

        p = r;

        break;

      }

    r = p;

  }

}