[Bug fortran/36652] New: Internal compiler error: in gfc_conv_expr

[j dot wookey at bristol dot ac dot uk]

When compiling the code (taken and simplified from FoX, the FORTRAN XML
library):

module charset
     implicit none
     private

     character(len=1), parameter :: SPACE = achar(32)
     character(len=1), parameter :: NEWLINE = achar(10)
     character(len=1), parameter :: CARRIAGE_RETURN = achar(13)
     character(len=1), parameter :: TAB = achar(9)

!  ** taking the last one or two items out of the concatenation allows
compilation 
     character(len=*), parameter :: whitespace =
SPACE//NEWLINE//CARRIAGE_RETURN//TAB

     public :: whitespace

     public :: allowed_encoding

contains

     function allowed_encoding(encoding) result(p)
     character(len=*), intent(in) :: encoding
      logical :: p

      character(len=100) :: enc

      logical :: utf8, usascii, iso88591

!  ** restoring the next line allows compilation
!      utf8 = .false.
      p = utf8.or.usascii.or.iso88591

        stop
   end function allowed_encoding     
end module charset

with the command: gfortran -v -save-temps -c testbug.f90
I get an Internal Error:

Using built-in specs.
Target: i386-apple-darwin9.2.0
Configured with: ../gcc-4.4-20080509/configure --enable-languages=fortran
Thread model: posix
gcc version 4.4.0 20080509 (experimental) (GCC) 
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.5.3' '-v' '-save-temps' '-c'
'-mtune=generic'
 /usr/local/libexec/gcc/i386-apple-darwin9.2.0/4.4.0/f951 testbug.f90 -fPIC
-quiet -dumpbase testbug.f90 -mmacosx-version-min=10.5.3 -mtune=generic
-auxbase testbug -version -fintrinsic-modules-path
/usr/local/lib/gcc/i386-apple-darwin9.2.0/4.4.0/finclude -o testbug.s
GNU Fortran (GCC) version 4.4.0 20080509 (experimental)
(i386-apple-darwin9.2.0)
        compiled by GNU C version 4.4.0 20080509 (experimental), GMP version
4.2.1, MPFR version 2.2.1.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
testbug.f90: In function ‘allowed_encoding’:
testbug.f90:19: internal compiler error: in gfc_conv_expr, at
fortran/trans-expr.c:3589
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


-- 
           Summary: Internal compiler error: in gfc_conv_expr
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: j dot wookey at bristol dot ac dot uk
 GCC build triplet:  ../gcc-4.4-20080509/configure --enable-
                    languages=fortran
GCC target triplet: i386-apple-darwin9.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36652