Arithmetic exception in PROPOSAL

vertical_EAS with parameters 1 1 1e9 10 on current master branch yields a FPE:

 (gdb) run 1 1 1e9 10 > /dev/null
Starting program: /home/tmp/reininghaus/corsika-build-gcc-release/Documentation/Examples/vertical_EAS 1 1 1e9 10 > /dev/null
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Program received signal SIGFPE, Arithmetic exception.
0x0000555555bdbf2c in PROPOSAL::Integral::Trapezoid3S (this=this@entry=0x5555579832f8, n=n@entry=81, oldSum=<optimized out>, stepNumber=stepNumber@entry=4) at /cr/users/reininghaus/git/corsika/Processes/Proposal/PROPOSAL/src/PROPOSAL/math/Integral.cxx:748
748                                 approX      = (bEq + determinant) / aEq;

I believe this is reproducible with the fixed seed.