[Bug target/65531] New: ICE: symtab_node::verify failed: Two symbols with same comdat_group are not linked by the same_comdat_group list. with -fcheck-pointer-bounds -mmpx

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65531

            Bug ID: 65531
           Summary: ICE: symtab_node::verify failed: Two symbols with same
                    comdat_group are not linked by the same_comdat_group
                    list. with -fcheck-pointer-bounds -mmpx
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 35118
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35118&action=edit
reduced testcase

Compiler output:
$ gcc -fcheck-pointer-bounds -mmpx testcase.C         
testcase.C:10:4: error: Two symbols with same comdat_group are not linked by
the same_comdat_group list.
 S s;
    ^
_ZN1SD1Ev.chkp/11 (S::~S(#'pointer_bounds_type' not supported by
dump_type#<type error>, void, ...)) @0x7f52d8b0f310
  Type: function definition analyzed alias cpp_implicit_alias
  Visibility: external public weak comdat comdat_group:_ZN1SD5Ev one_only
  Same comdat group as: _ZN1SD1Ev/2
  Address is taken.
  References: _ZN1SD2Ev.chkp/10 (alias)
  Referring: _ZN1SD1Ev/2 (chkp)
  Availability: available
  First run: 0
  Function flags:
  Called by: 
  Calls: 
  Is instrumented version.
_ZN1SD2Ev.chkp/10 (S::~S(#'pointer_bounds_type' not supported by
dump_type#<type error>, void, ...)) @0x7f52d8b0f188
  Type: function definition analyzed
  Visibility: external public weak comdat comdat_group:_ZN1SD5Ev one_only
artificial
  Same comdat group as: _ZN1SD2Ev/1
  Address is taken.
  References: 
  Referring: _ZN1SD1Ev.chkp/11 (alias)_ZN1SD2Ev/1 (chkp)
  Availability: available
  First run: 0
  Function flags: body
  Called by: _ZN1SD2Ev/1 (1.00 per call) 
  Calls: 
  Is instrumented version.
testcase.C:10:4: internal compiler error: symtab_node::verify failed
0x9dc3c4 symtab_node::verify_symtab_nodes()
        /mnt/svn/gcc-trunk/gcc/symtab.c:1140
0xc28668 symbol_table::remove_unreachable_nodes(_IO_FILE*)
        /mnt/svn/gcc-trunk/gcc/ipa.c:686
0xd0d4bd execute_todo
        /mnt/svn/gcc-trunk/gcc/passes.c:2023
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

$ gcc -v                                     
Using built-in specs.
COLLECT_GCC=/mnt/svn/gcc-trunk/binary-latest/bin/gcc
COLLECT_LTO_WRAPPER=/mnt/svn/gcc-trunk/binary-221530-lto-fortran-checking-yes-rtl-df/libexec/gcc/x86_64-unknown-linux-gnu/5.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /mnt/svn/gcc-trunk//configure --enable-checking=yes,rtl,df
--enable-languages=c,c++,lto,fortran
--prefix=/mnt/svn/gcc-trunk/binary-221530-lto-fortran-checking-yes-rtl-df/
--without-cloog --without-ppl
Thread model: posix
gcc version 5.0.0 20150320 (experimental) (GCC) 

Tested revisions:
r221530 - ICE