Your bug reports play an essential role in making GNU Fortran reliable.
When you encounter a problem, the first thing to do is to see if it is already known. See Trouble. If it isn't known, then you should report the problem.
Reporting a bug might help you by bringing a solution to your problem, or it might not. (If it does not, look in the service directory; see Service.) In any case, the principal function of a bug report is to help the entire community by making the next version of GNU Fortran work better. Bug reports are your contribution to the maintenance of GNU Fortran.
Since the maintainers are very overloaded, we cannot respond to every bug report. However, if the bug has not been fixed, we are likely to send you a patch and ask you to tell us whether it works.
In order for a bug report to serve its purpose, you must include the information that makes for fixing the bug.
See Known Causes of Trouble with GNU Fortran, for information on problems we already know about.
See How To Get Help with GNU Fortran, for information on where to ask for help.