https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62026
--- Comment #11 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Thanks for the testcase.
Reduced:
markus@x4 /tmp % cat ErrorTry.ii
template <typename T>
class B {
public:
T values;
T operator[](int);
};
class C;
class D {
public:
int m_fn2();
virtual C *m_fn1();
};
class C : public D {
public:
virtual B<int> *m_fn3(int);
};
class F : D, C {
B<int> *offsets;
B<int> *m_fn3(int);
};
B<int> *F::m_fn3(int) {
if (offsets) return 0;
}
void fn1(B<D *> &p1) {
for (int i;;) {
C *a = p1[0]->m_fn1();
a->m_fn2() && a->m_fn3(0);
}
}
markus@x4 /tmp % g++ -flto -O3 -r -nostdlib ErrorTry.ii
ErrorTry.ii:17:7: warning: direct base ‘D’ inaccessible in ‘F’ due to ambiguity
class F : D, C {
^
lto1: internal compiler error: Segmentation fault
0x943f9f crash_signal
../../gcc/gcc/toplev.c:340
0x843af8 lto_get_decl_name_mapping(lto_file_decl_data*, char const*)
../../gcc/gcc/lto-section-in.c:340
0x83ce96 copy_function_or_variable
../../gcc/gcc/lto-streamer-out.c:2163
0x83dae1 lto_output()
../../gcc/gcc/lto-streamer-out.c:2255
0x889701 write_lto
../../gcc/gcc/passes.c:2228
0x88cccb ipa_write_optimization_summaries(lto_symtab_encoder_d*)
../../gcc/gcc/passes.c:2425
0x55db6a do_stream_out
../../gcc/gcc/lto/lto.c:2463
0x55f849 stream_out
../../gcc/gcc/lto/lto.c:2505
0x55f849 lto_wpa_write_files
../../gcc/gcc/lto/lto.c:2642
0x568a94 do_whole_program_analysis
../../gcc/gcc/lto/lto.c:3310
0x568a94 lto_main()
../../gcc/gcc/lto/lto.c:3430
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.
