https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81367
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- AFAICT this is fixed in 5.4.1 and 6.4.0: % gfc5 pr81367.f90 pr81367.f90:5:18: character(len=f)::fname 1 Error: Scalar INTEGER expression expected at (1) % gfc5 -v Using built-in specs. COLLECT_GCC=gfc5 COLLECT_LTO_WRAPPER=/opt/gcc/gcc5wr/libexec/gcc/x86_64-apple-darwin16.6.0/5.4.1/lto-wrapper Target: x86_64-apple-darwin16.6.0 Configured with: ../5_work/configure --prefix=/opt/gcc/gcc5wr --enable-languages=c,c++,fortran,objc,obj-c++,ada,java,lto --with-gmp=/opt/mp-new --with-system-zlib --with-isl=/opt/mp-new --enable-lto --enable-plugin Thread model: posix gcc version 5.4.1 20170604 [5 branch revision 248859p3] (GCC) % gfortran-fsf-6 pr81367.f90 pr81367.f90:5:18: character(len=f)::fname 1 Error: Scalar INTEGER expression expected at (1) % gfortran-fsf-6 -v Using built-in specs. COLLECT_GCC=gfortran-fsf-6 COLLECT_LTO_WRAPPER=/sw64/lib/gcc6/libexec/gcc/x86_64-apple-darwin16.6.0/6.4.0/lto-wrapper Target: x86_64-apple-darwin16.6.0 Configured with: ../gcc-6.4.0/configure --prefix=/sw64 --prefix=/sw64/lib/gcc6 --mandir=/sw64/share/man --infodir=/sw64/lib/gcc6/info --enable-languages=c,c++,fortran,lto,objc,obj-c++,java --with-gmp=/sw64 --with-libiconv-prefix=/sw64 --with-isl=/sw64 --with-mpc=/sw64 --with-system-zlib --program-suffix=-fsf-6 Thread model: posix gcc version 6.4.0 (GCC)