[Bug tree-optimization/65337] [5 regression] LTO bootstrap failure with Ada enabled

[steven at uplinklabs dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65337

--- Comment #18 from Steven Noonan <steven at uplinklabs dot net> ---
I'm still seeing an Ada-related failure when using
--with-build-config=bootstrap-lto on the current gcc-7-branch (r253607).


/build/gcc-multilib/src/gcc/gcc/ada/g-dyntab.adb: In function
‘prep__symbol_table__free’:
/build/gcc-multilib/src/gcc/gcc/ada/g-dyntab.adb:140:9: internal compiler
error: in gen_typedef_die, at dwarf2out.c:24370
    end Free;
         ^
0x8b8067 gen_typedef_die
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:24370
0x8b9f6d gen_decl_die
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:25390
0x8b85ad gen_type_die_with_usage
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:24547
0x8b8d24 gen_type_die
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:24758
0x8b9fec gen_decl_die
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:25410
0x8b9146 process_scope_var
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:24903
0x8b91a4 decls_for_scope
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:24928
0x8b3c5c gen_subprogram_die
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:22465
0x8b9e9a gen_decl_die
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:25364
0x8bacd2 dwarf2out_decl
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:25873
0x8bad31 dwarf2out_function_decl
        /build/gcc-multilib/src/gcc/gcc/dwarf2out.c:25888
0x939924 rest_of_handle_final
        /build/gcc-multilib/src/gcc/gcc/final.c:4520
0x939a92 execute
        /build/gcc-multilib/src/gcc/gcc/final.c:4562
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