[Bug fortran/98701] I compiled a program with gfortran on Mac (Big Sur, version 11.1) and g77 on Windows 10. I get two very different results for identical input files with the results from the one compiled by gfortran being wrong.

[Bahram.shahrooz at uc dot edu via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98701

--- Comment #11 from Bahram.shahrooz at uc dot edu ---
Thanks!

This is how I compiled: 

gfortran FiberAnalysis.f -finit-real=nan -fcheck=all -ffpe-trap=zero,invalid -o
FiberAnalysis_v2

This what I get after running (the answers are correct):

Program received signal SIGFPE: Floating-point exception - erroneous arithmetic
operation.

Backtrace for this error:
#0  0x105c4ad3d
#1  0x105c4a16d
#2  0x7fff203c4d7c
#3  0x105c34e45
#4  0x105c3c653
#5  0x105c3cae6
zsh: floating point exception  /Users/bahram/FiberAnalysis_v2
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.
Deleting expired sessions...none found.

Do you've any suggestions for how to trace the source of error so I can fix the
code?