Regressions on trunk at revision 254786 vs revision 254781

[H.J. Lu Intel64 Core i7]

New failures:

New passes:
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 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: g++.dg/cpp0x/lambda/lambda-switch.C  -std=c++11 (test for excess errors)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C  -std=c++11 (test for excess errors)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C  -std=c++11  (test for warnings, line 19)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C  -std=c++11  (test for warnings, line 19)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C  -std=c++14 (test for excess errors)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C  -std=c++14  (test for warnings, line 19)
FAIL: g++.dg/cpp0x/lambda/lambda-switch.C  -std=c++14  (test for warnings, line 19)