------- Comment From <email address hidden> 2016-01-14 11:27 EDT-------
The ubsan overflow tests seem to have some issues with rounding, which make them a little unpredictable as the compiler changes. See PR63361 for an example bug report from a different architecture. It's unlikely that there's anything serious here, at first glance. If the reason for failure is the same kind of "outside the range of representative values" message having the wrong count, I wouldn't worry about it. But I can't tell whether that's the case.
------- Comment From <email address hidden> 2016-01-14 11:27 EDT-------
The ubsan overflow tests seem to have some issues with rounding, which make them a little unpredictable as the compiler changes. See PR63361 for an example bug report from a different architecture. It's unlikely that there's anything serious here, at first glance. If the reason for failure is the same kind of "outside the range of representative values" message having the wrong count, I wouldn't worry about it. But I can't tell whether that's the case.