Software compiled statically with clang++ (not clang-cl) and linked with libcmt(d).lib and libcpmt(d).lib generate a Runtime error soon into execution.

If linked with Microsoft's link.exe, it works properly. This is new as of a few weeks ago, but I'm unclear at which point this issue started.

I'm trying to find a simple example to demonstrate this, but I can't debug it to find it. As soon as I hit Retry, which should break at the offending line of code, the software exits instead.

Strangely, it is not immediate, but happens after our software has been running for a couple of seconds. I can verify that we have already done several floating point operations.