https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83218

            Bug ID: 83218
           Summary: gforttran command fails to compile if fortran file is
                    present inside folder "%+@"
           Product: gcc
           Version: 6.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sanket.karnik.s at gmail dot com
  Target Milestone: ---

I was trying to compile a Fortran file which was present inside a directory
called "%+@". This works fine with gfortran 4.9, however, when I tried to do
the same using gfortran 6.3 I get an error. I tried to compile a simple "Hello
world" program but even that code failed to compile.

Output for version:
gfortran --version
GNU Fortran (MW GCC 6.3.0-GLIBC2.11) 6.3.0
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Reproduction steps from any directory:
1. % mkdir %+@
2. %gedit %+@/hello_world.f90
3. copy following code and save the file:
program hello
        print *, "Hello World!"
end program hello
4. gfortran %+@/hello_world.f90

This should produce an error.

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