Regressions on trunk at revision 243473 vs revision 243446

[Intel Automatic Testing System [ia32 Core AVX2 PIC]]

New failures:
FAIL: gcc.dg/attr-alloc_size-3.c (test for excess errors)
FAIL: gcc.dg/attr-alloc_size-3.c  (test for warnings, line 445)

New passes:
FAIL: 25_algorithms/headers/algorithm/parallel_algorithm_assert2.cc (test for excess errors)