Debug C++ code: Catch first NaN appearance

Question

Is there a simple way to check a C++ code in a debugger for the very first appearance of a NaN value?

Accepted Answer

The answer is given here: https://stackoverflow.com/a/5394095/1326595

Just include

```
#include <fenv.h>
```

and than add the following line to the code:

```
feenableexcept(FE_INVALID | FE_OVERFLOW);
```

The debugger is than able to capture the signal and shows the very first occurrence of a NaN.

Solution