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From: "slyfox at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/106334] [13 Regression] lto -g ICE in
 dwarf2out_register_external_die at dwarf2out.cc:6072
Date: Sun, 31 Jul 2022 07:36:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106334

Sergei Trofimovich <slyfox at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |NEW
         Resolution|FIXED                       |---

--- Comment #5 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
I'll reopen this bug. I still see the crash in original example. I can make
#comment1 example crash by using `-flto-partition=3Dnone` in the link phase:

$ ./result/bin/g++ -O1 -flto -fPIC -g -I. -o eval-cache.o -c eval-cache.cc =
&&
./result/bin/g++ -O1 -flto -fPIC -g -I. -o eval.o -c eval.cc &&
./result/bin/g++ -O1 -flto -fPIC -g -I. -o libnixexpr.so -shared eval-cache=
.o
eval.o -flto-partition=3Dnone
lto1: internal compiler error: in dwarf2out_register_external_die, at
dwarf2out.cc:6076
0x1dc6714 diagnostic_impl(rich_location*, diagnostic_metadata const*, int, =
char
const*, __va_list_tag (*) [1], diagnostic_t)
        ???:0
0x1dc7366 internal_error(char const*, ...)
        ???:0
0x8b7012 fancy_abort(char const*, int, char const*)
        ???:0
0xa07036 dwarf2out_register_external_die(tree_node*, char const*, unsigned
long)
        ???:0
0x904efd lto_read_decls(lto_file_decl_data*, void const*,
vec<ld_plugin_symbol_resolution, va_heap, vl_ptr>)
        ???:0
0x905c6a read_cgraph_and_symbols(unsigned int, char const**)
        ???:0
0x8edc52 lto_main()
        ???:0

The compiler should already cpntain the fix:

$ ./result/bin/g++ -v | unnix
Using built-in specs.
COLLECT_GCC=3D/nix/store/w9kh67lghm1mq5gbcgg06d00d982cyj2-gcc-13.0.0/bin/g++
COLLECT_LTO_WRAPPER=3D/nix/store/w9kh67lghm1mq5gbcgg06d00d982cyj2-gcc-13.0.=
0/libexec/gcc/x86_64-unknown-linux-gnu/13.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with:
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 13.0.0 20220724 (experimental) (GCC)=