Fortran exceptions

I have a fairly large fortran program that I am trying to run on flang.  It almost works, but I am sure there are a few typos in it.  I had to enter it by hand from a large listing.  When it encounters a STOP, it displays several ieee exception messages.  Unfortunately there is no way to identify where those occurred.  How can I get the runtime to stop when an exception occurs.  This is on FreeBSD 13.0 release with whatever flang is in the ports.

-- Doug