Regressions on trunk at revision 254740 vs revision 254724

[H.J. Lu Intel64 -fpic -mcmodel=medium -mcmodel=large]

New failures:
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 138)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 138)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 138)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 30)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 30)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 30)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 36)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 36)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 36)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 40)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 40)
FAIL: 26_numerics/gcd/gcd_neg.cc  (test for errors, line 40)

New passes:
FAIL: c-c++-common/Wstringop-truncation.c  -std=gnu++14  (test for warnings, line 211)
FAIL: c-c++-common/Wstringop-truncation.c  -std=gnu++14  (test for warnings, line 211)
FAIL: c-c++-common/Wstringop-truncation.c  -std=gnu++14  (test for warnings, line 212)
FAIL: c-c++-common/Wstringop-truncation.c  -std=gnu++14  (test for warnings, line 212)
FAIL: c-c++-common/Wstringop-truncation.c  -std=gnu++98  (test for warnings, line 211)
FAIL: c-c++-common/Wstringop-truncation.c  -std=gnu++98  (test for warnings, line 212)