Regressions on trunk at revision 253496 vs revision 253489

[H.J. Lu]

New failures:
FAIL: ext/shared_ptr/1.cc (test for excess errors)
FAIL: ext/slist/23781_neg.cc  (test for errors, line 27)
FAIL: ext/slist/23781_neg.cc  (test for errors, line 28)
FAIL: ext/slist/23781_neg.cc (test for excess errors)
FAIL: ext/stdio_filebuf/char/10063-3.cc (test for excess errors)
FAIL: ext/stdio_filebuf/char/2.cc (test for excess errors)
FAIL: ext/stdio_filebuf/char/79820.cc (test for excess errors)
FAIL: ext/stdio_filebuf/char/81751.cc (test for excess errors)
FAIL: ext/stdio_filebuf/requirements/explicit_instantiation.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/char/12048-1.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/char/12048-2.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/char/12048-3.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/char/12048-4.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/char/1.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/char/35209.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/12948-1.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/12948-2.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/12948-3.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/12948-4.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/1.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/35209.cc (test for excess errors)
FAIL: ext/throw_allocator/check_allocate_max_size.cc (test for excess errors)
FAIL: ext/throw_allocator/check_deallocate_null.cc (test for excess errors)
FAIL: ext/throw_allocator/check_delete.cc (test for excess errors)
FAIL: ext/throw_allocator/check_new.cc (test for excess errors)
FAIL: ext/throw_allocator/deallocate_global.cc (test for excess errors)
FAIL: ext/throw_allocator/deallocate_local.cc (test for excess errors)
FAIL: ext/throw_allocator/explicit_instantiation.cc (test for excess errors)
FAIL: ext/throw_allocator/variadic_construct.cc (test for excess errors)
FAIL: ext/throw_value/cons.cc (test for excess errors)
FAIL: ext/type_traits/add_unsigned.cc (test for excess errors)
FAIL: ext/type_traits/add_unsigned_floating_neg.cc  (test for errors, line 28)
FAIL: ext/type_traits/add_unsigned_floating_neg.cc  (test for errors, line 33)
FAIL: ext/type_traits/add_unsigned_floating_neg.cc  (test for errors, line 71)
FAIL: ext/type_traits/add_unsigned_floating_neg.cc (test for excess errors)
FAIL: ext/type_traits/add_unsigned_integer_neg.cc  (test for errors, line 100)
FAIL: ext/type_traits/add_unsigned_integer_neg.cc  (test for errors, line 103)
FAIL: ext/type_traits/add_unsigned_integer_neg.cc  (test for errors, line 28)
FAIL: ext/type_traits/add_unsigned_integer_neg.cc  (test for errors, line 33)
FAIL: ext/type_traits/add_unsigned_integer_neg.cc  (test for errors, line 34)
FAIL: ext/type_traits/add_unsigned_integer_neg.cc (test for excess errors)
FAIL: ext/type_traits/remove_unsigned.cc (test for excess errors)
FAIL: ext/type_traits/remove_unsigned_floating_neg.cc  (test for errors, line 114)
FAIL: ext/type_traits/remove_unsigned_floating_neg.cc  (test for errors, line 28)
FAIL: ext/type_traits/remove_unsigned_floating_neg.cc  (test for errors, line 33)
FAIL: ext/type_traits/remove_unsigned_floating_neg.cc (test for excess errors)
FAIL: ext/type_traits/remove_unsigned_integer_neg.cc  (test for errors, line 143)
FAIL: ext/type_traits/remove_unsigned_integer_neg.cc  (test for errors, line 146)
FAIL: ext/type_traits/remove_unsigned_integer_neg.cc  (test for errors, line 28)
FAIL: ext/type_traits/remove_unsigned_integer_neg.cc  (test for errors, line 33)
FAIL: ext/type_traits/remove_unsigned_integer_neg.cc  (test for errors, line 34)
FAIL: ext/type_traits/remove_unsigned_integer_neg.cc (test for excess errors)

New passes: