https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66027
--- Comment #2 from JD <t at sharklasers dot com> ---
I managed create a minimal example.
bug66027 $ make -j
g++ -std=c++14 -c -fPIC -march=native -O3 -flto -fuse-linker-plugin
-fno-fat-lto-objects ASTContext_preproc.cpp -o ASTContext_preproc.o
g++ -std=c++14 -c -fPIC -march=native -O3 -flto -fuse-linker-plugin
-fno-fat-lto-objects ASTConsumer_preproc.cpp -o ASTConsumer_preproc.o
ar cru libAST.a ASTContext_preproc.o ASTConsumer_preproc.o
g++ -flto=4 -std=c++14 -march=native -fuse-linker-plugin -shared -o bla.so
CIndex_preproc.cpp libAST.a
<nullptr_type 0x7f9352ff5d20 decltype(nullptr) unsigned DI
size <integer_cst 0x7f9353b9bbb8 type <integer_type 0x7f9353b9f150
bitsizetype> constant 64>
unit size <integer_cst 0x7f9353b9bbd0 type <integer_type 0x7f9353b9f0a8
sizetype> constant 8>
align 8 symtab 0 alias set 0 canonical type 0x7f9352ff5d20
pointer_to_this <pointer_type 0x7f9352782738> reference_to_this
<reference_type 0x7f9352ff6000>>
lto1: internal compiler error: in odr_types_equivalent_p, at ipa-devirt.c:1543
0x807397 odr_types_equivalent_p
../../gcc-5.1.0/gcc/ipa-devirt.c:1543
0x8076ad odr_types_equivalent_p
../../gcc-5.1.0/gcc/ipa-devirt.c:1440
0x804ca1 add_type_duplicate
../../gcc-5.1.0/gcc/ipa-devirt.c:1770
0x804ca1 get_odr_type(tree_node*, bool)
../../gcc-5.1.0/gcc/ipa-devirt.c:1959
0x80642c register_odr_type(tree_node*)
../../gcc-5.1.0/gcc/ipa-devirt.c:2034
0x63876d lto_read_decls
../../gcc-5.1.0/gcc/lto/lto.c:1952
0x6394ae lto_file_finalize
../../gcc-5.1.0/gcc/lto/lto.c:2249
0x6394ae lto_create_files_from_ids
../../gcc-5.1.0/gcc/lto/lto.c:2259
0x6394ae lto_file_read
../../gcc-5.1.0/gcc/lto/lto.c:2300
0x6394ae read_cgraph_and_symbols
../../gcc-5.1.0/gcc/lto/lto.c:3005
0x6394ae lto_main()
../../gcc-5.1.0/gcc/lto/lto.c:3475
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.
lto-wrapper: fatal error: g++ returned 1 exit status
compilation terminated.
/usr/bin/ld: lto-wrapper failed
collect2: error: ld returned 1 exit status
Makefile:7: recipe for target 'all' failed
make: *** [all] Error 1
ld -v
GNU ld (GNU Binutils; openSUSE 13.2) 2.24.0.20140403-6.1
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/german/local/gcc5.1/lib/gcc/x86_64-unknown-linux-gnu/5.1.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-5.1.0/configure --prefix=/home/german/local/gcc5.1
--enable-languages=c,c++ --enable-gold=yes --enable-ld=yes --enable-lto
--enable-bootstrap --disable-multilib
Thread model: posix
gcc version 5.1.0 (GCC)
ar --version
GNU ar (GNU Binutils; openSUSE 13.2) 2.24.0.20140403-6.1
