gcc/testsuite/g++.old-deja/g++.jason/synth9.C

// PRMS Id: 6837
// Bug: anonymous union confuses g++.
// Build don't link:

struct my_key {
   my_key(const my_key&);
   my_key(const char* n);
};

struct my_node {
   my_node(my_key&);
   union {
      long cnt;
      my_node* next;
   };
   my_key a;
};

extern my_node n;
my_node a(n);