Regressions on trunk at revision 202731 vs revision 202683

[H.J. Lu x32]

New failures:
FAIL: ext/random/normal_mv_distribution/cons/default.cc (test for excess errors)
FAIL: ext/random/normal_mv_distribution/cons/parms.cc (test for excess errors)
FAIL: ext/random/normal_mv_distribution/operators/equal.cc (test for excess errors)
FAIL: ext/random/normal_mv_distribution/operators/inequal.cc (test for excess errors)
FAIL: ext/random/normal_mv_distribution/operators/serialize.cc (test for excess errors)
FAIL: ext/random/normal_mv_distribution/requirements/explicit_instantiation/1.cc (test for excess errors)

New passes: