trunk doesn't compile with recent gfortran 6.0.0

[Juergen Reuter]

/bin/sh ../../libtool  --tag=FC   --mode=compile gfortran -I../basics -I../utilities -I../testing -I../system -I../combinatorics   -fcheck=all -c -o lexers.lo  lexers.f90
libtool: compile:  gfortran -I../basics -I../utilities -I../testing -I../system -I../combinatorics -fcheck=all -c lexers.f90  -fno-common -o .libs/lexers.o
lexers.f90:452:14:

     character(tt%len1) :: ch1
              1
Error: Scalar INTEGER expression expected at (1)
lexers.f90:453:14:

     character(tt%len2) :: ch2
              1
Error: Scalar INTEGER expression expected at (1)
lexers.f90:455:7:

     ch1 = tt%charset1
       1
Error: Symbol 'ch1' at (1) has no IMPLICIT type
lexers.f90:457:10:

        ch2 = tt%charset2
          1
Error: Symbol 'ch2' at (1) has no IMPLICIT type
make[3]: *** [lexers.lo] Error 1
make[2]: *** [all] Error 2
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive] Error 1

[Juergen Reuter]

Steve Kargl made me file a new bug: ​https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68108

[Juergen Reuter]

This has been fixed in gcc's r229293, thanks to Steve Kargl.