[Bug lto/64043] [5 Regression] ICE (segfault) with LTO: in tree_check/tree.h:2758 get_binfo_at_offset/tree.c:11914

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64043

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-11-24
                 CC|                            |trippels at gcc dot gnu.org
   Target Milestone|---                         |5.0
     Ever confirmed|0                           |1

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
This is a case of -O0 vs -O2 (during final link):

Further reduced:

markus@x4 testcase % cat one.ii
class Validator
{
public:
  virtual ~Validator ();
};
class FooWriter
{
  Validator *validator;
  ~FooWriter ();
};
FooWriter::~FooWriter () { delete validator; }

markus@x4 testcase % g++ -flto -std=c++11 -c one.ii
markus@x4 testcase % g++ -r -nostdlib -O2 -flto one.o
one.ii: In member function â__base_dtor â:
one.ii:11:1: internal compiler error: Segmentation fault
 FooWriter::~FooWriter () { delete validator; }
 ^
0x9dc45f crash_signal
        ../../gcc/gcc/toplev.c:359
0xc3f211 tree_check
        ../../gcc/gcc/tree.h:2758
0xc3f211 get_binfo_at_offset(tree_node*, long, tree_node*)
        ../../gcc/gcc/tree.c:11914
0x82855b possible_polymorphic_call_targets(tree_node*, long,
ipa_polymorphic_call_context, bool*, void**, bool)
        ../../gcc/gcc/ipa-devirt.c:2404
0x792a2f possible_polymorphic_call_targets(tree_node*, gimple_statement_base*,
bool*, void**)
        ../../gcc/gcc/ipa-utils.h:126
0x790c4a gimple_fold_call
        ../../gcc/gcc/gimple-fold.c:2667
0x790c4a fold_stmt_1
        ../../gcc/gcc/gimple-fold.c:3246
0xafb1a3 execute
        ../../gcc/gcc/tree-ssa-forwprop.c:2228
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
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lto-wrapper: fatal error: /var/tmp/gcc_test/usr/local/bin/g++ returned 1 exit
status
compilation terminated.
/usr/bin/ld: fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status