[Bug c++/61623] New: [4.10 Regression] ICE: verify_symtab failed: Two symbols with same comdat_group are not linked by the same_comdat_group list.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61623

            Bug ID: 61623
           Summary: [4.10 Regression] ICE: verify_symtab failed: Two
                    symbols with same comdat_group are not linked by the
                    same_comdat_group list.
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 33012
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33012&action=edit
reduced testcase

Compiler output:
$ gcc -Os testcase.C
testcase.C:7:8: error: Two symbols with same comdat_group are not linked by the
same_comdat_group list.
 A a (0);
        ^
_ZN1AC1Ei/8 (A::A(int)) @0x7f200bc92170
  Type: function definition analyzed
  Visibility: externally_visible public weak comdat comdat_group:_ZN1AC5Ei
one_only
  Same comdat group as: _ZN1AC2Ei/7
  References: 
  Referring: 
  Availability: available
  First run: 0
  Function flags: body
  Called by: _Z41__static_initialization_and_destruction_0ii/19 (0.07 per call) 
  Calls: _ZN1AC4Ei.isra.0/31 (1.00 per call) 
_ZN1AC1Ei/8 (A::A(int)) @0x7f200bc92170
  Type: function definition analyzed
  Visibility: externally_visible public weak comdat comdat_group:_ZN1AC5Ei
one_only
  Same comdat group as: _ZN1AC2Ei/7
  References: 
  Referring: 
  Availability: available
  First run: 0
  Function flags: body
  Called by: _Z41__static_initialization_and_destruction_0ii/19 (0.07 per call) 
  Calls: _ZN1AC4Ei.isra.0/31 (1.00 per call) 
testcase.C:7:8: internal compiler error: verify_symtab failed
0x9407e6 verify_symtab()
        /mnt/svn/gcc-trunk/gcc/symtab.c:1192
0xb45040 symtab_remove_unreachable_nodes(bool, _IO_FILE*)
        /mnt/svn/gcc-trunk/gcc/ipa.c:591
0x94e93b ipa_passes
        /mnt/svn/gcc-trunk/gcc/cgraphunit.c:2064
0x94e93b compile()
        /mnt/svn/gcc-trunk/gcc/cgraphunit.c:2186
0x94f3d4 finalize_compilation_unit()
        /mnt/svn/gcc-trunk/gcc/cgraphunit.c:2341
0x72860e cp_write_global_declarations()
        /mnt/svn/gcc-trunk/gcc/cp/decl2.c:4647
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.

Tested revisions:
r212007 - ICE
4_9 r211338 - OK