Oracle Developer Studio 12.6 Fortran compiler: ieee_arithmetic_semantics: assertion `0' failed

Question

On Linux (Ubuntu 16.04, kernel 4.4.0-186-generic), I used the Fortran compiler sunf95 from Oracle Developer Studio 12.6 to compile the following Fortran code:

program testieee
    use ieee_arithmetic, only : is_nan => ieee_is_nan
    implicit none
    print *, is_nan(0.0)
end program testieee

No compiler option was specified. The compilation failed with the following message:

f90comp: ../src/s_intr_mod.c :772 : ieee_arithmetic_semantics: assertion `0' failed.
f90: Fatal error in $PATH_TO_ORACLE_DEVELOPER_STUDIO/OracleDeveloperStudio12.6-linux-x86-bin/developerstudio12.6/lib/compilers/bin/f90comp : Signal number = 6

However, the following code can be compiled successfully using the same compiler:

program testieee
    use ieee_arithmetic, only : ieee_is_nan  ! Here is the only difference.
    implicit none
    print *, ieee_is_nan(0.0)
end program testieee

Both versions of the code can be compiled without any problem by gfortran, g95, ifort, nagfor, pgfortran, and absoft fortran compilers.

So why did Oracle Developer Studio 12.6 fail? What does the error message mean? Any comments/criticism on the code will be appreciated. Thank you very much.

Edit

• As speculated by @Ian Bush, the error might be because the name "is_nan" conflicted with that of some nonstandard intrinsic procedure. So I tried changing it to "my_nan", but the error persisted. Thanks to Ian Bush.