Internal compiler error when attempting Chapel calling Fortran

[mstrout]

This is not a show stopper at this point. Current work around is to not include the header file on the compilation command. Of course then I get a linking error, but that is for another github issue.

Steps to Reproduce

Source Code:

// example.chpl

// extern declaration of a function in exampleLib.f90
pragma "generate signature"
extern proc myfunc(formal1 : real, formal2 : int) : real;

var answer = myfunc(2.0, 3);
writeln("answer should be 8.0, answer = ", answer);

! exampleLib.f90

module TestProcs
  use iso_c_binding
  implicit none

  contains

double precision function myfunc(formal1, formal2) bind(C,name='myfunc')
  double precision formal1
  integer formal2
  double precision power
  integer i

  !real(8), bind(C, name='power') :: power = 1.0

  power = 1.0d0
  do i = 0, formal2 - 1
    power = power * formal1
  end do

  myfunc = power
end function myfunc

end module TestProcs

// exampleLib.h

double myfunc(double formal1, int formal2);

Compile command:

gfortran -c exampleLib.f90
chpl exampleLib.h exampleLib.o example.chpl
example.chpl:4: internal error: COD-CG--BOL-2313 chpl version 1.32.0

Internal errors indicate a bug in the Chapel compiler,
and we're sorry for the hassle.  We would appreciate your reporting this bug --
please see https://chapel-lang.org/bugs.html for instructions.  In the meantime,
the filename + line number above may be useful in working around the issue.

Configuration Information

chpl --version
chpl version 1.32.0
  built with LLVM version 15.0.7
  available LLVM targets: xcore, x86-64, x86, wasm64, wasm32, ve, systemz, sparcel, sparcv9, sparc, riscv64, riscv32, ppc64le, ppc64, ppc32le, ppc32, nvptx64, nvptx, msp430, mips64el, mips64, mipsel, mips, lanai, hexagon, bpfeb, bpfel, bpf, avr, thumbeb, thumb, armeb, arm, amdgcn, r600, aarch64_32, aarch64_be, aarch64, arm64_32, arm64
Copyright 2020-2023 Hewlett Packard Enterprise Development LP
Copyright 2004-2019 Cray Inc.
(See LICENSE file for more details)

gfortran --version
GNU Fortran (Homebrew GCC 13.2.0) 13.2.0
Copyright (C) 2023 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.