[Bug fortran/69524] New: [ICE] [F2008] Compiler segfaults on simple testcase @ -O0

["kyukhin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69524

            Bug ID: 69524
           Summary: [ICE] [F2008] Compiler segfaults on simple testcase @
                    -O0
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kyukhin at gcc dot gnu.org
  Target Milestone: ---

Created attachment 37501
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37501&action=edit
Reproducer

Attached testcase produces ICE while compiling w/ recent trunk:

$ ./build-x86_64-linux/gcc/gfortran -B./build-x86_64-linux/gcc -S 2.f08
f951: internal compiler error: in build_function_decl, at
fortran/trans-decl.c:2065
0x88c1df build_function_decl
        /export/users/kyukhin/gcc/git/gcc2/gcc/fortran/trans-decl.c:2065
0x88ec53 gfc_create_function_decl(gfc_namespace*, bool)
        /export/users/kyukhin/gcc/git/gcc2/gcc/fortran/trans-decl.c:2758
0x86361d gfc_generate_module_code(gfc_namespace*)
        /export/users/kyukhin/gcc/git/gcc2/gcc/fortran/trans.c:2043
0x7f9d19 translate_all_program_units
        /export/users/kyukhin/gcc/git/gcc2/gcc/fortran/parse.c:5599
0x7fa3f7 gfc_parse_file()
        /export/users/kyukhin/gcc/git/gcc2/gcc/fortran/parse.c:5818
0x84c839 gfc_be_parse_file
        /export/users/kyukhin/gcc/git/gcc2/gcc/fortran/f95-lang.c:201
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