re PR testsuite/31884 (priority_queue_dijkstra.cc operates on deallocated memory)

re PR testsuite/31884 (priority_queue_dijkstra.cc operates on deallocated memory)

	PR testsuite/31884
	* testsuite/ext/pb_ds/example/priority_queue_dijkstra.cc (main): Do
	not access deleted nodes.

	* testsuite/25_algorithms/copy/streambuf_iterators/char/4.cc,
	testsuite/25_algorithms/find/istreambuf_iterators/char/2.cc,
	testsuite/27_io/basic_filebuf/open/char/4.cc,
	testsuite/27_io/objects/char/9.cc: Use dg-require-fileio.
	* testsuite/ext/forced_exception_error/cons_virtual_derivation.cc,
	testsuite/ext/pb_ds/regression/hash_data_map_rand.cc,
	testsuite/ext/pb_ds/regression/trie_data_map_rand.cc,
	testsuite/ext/pb_ds/regression/list_update_no_data_map_rand.cc,
	testsuite/ext/pb_ds/regression/tree_no_data_map_rand.cc,
	testsuite/ext/pb_ds/regression/list_update_data_map_rand.cc,
	testsuite/ext/pb_ds/regression/hash_no_data_map_rand.cc,
	testsuite/ext/pb_ds/regression/priority_queue_rand.cc,
	testsuite/ext/pb_ds/regression/tree_data_map_rand.cc,
	testsuite/ext/pb_ds/regression/trie_no_data_map_rand.cc,
	testsuite/ext/throw_allocator/deallocate_global.cc,
	testsuite/ext/throw_allocator/check_delete.cc,
	testsuite/ext/throw_allocator/check_allocate_max_size.cc,
	testsuite/ext/throw_allocator/check_deallocate_null.cc,
	testsuite/ext/throw_allocator/check_new.cc,
	testsuite/ext/throw_allocator/deallocate_local.cc,
	testsuite/tr1/5_numerical_facilities/random/subtract_with_carry_01/cons/gen1.cc,
	testsuite/tr1/5_numerical_facilities/random/subtract_with_carry/cons/gen1.cc,
	testsuite/tr1/5_numerical_facilities/random/linear_congruential/cons/gen1.cc,
	testsuite/tr1/5_numerical_facilities/random/mersenne_twister/cons/gen1.cc,
	testsuite/23_containers/list/modifiers/insert/25288.cc: Use
	dg-require-time.

From-SVN: r127590