https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119123
Bug ID: 119123
Summary: ICE when building llvm-20.1.0 with -g
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
Target Milestone: ---
Originally reported downstream in Gentoo at https://bugs.gentoo.org/950652.
```
$ g++ -c LSUnit.cpp.ii -g
/var/tmp/portage/llvm-core/llvm-20.1.0/work/llvm/lib/MCA/HardwareUnits/LSUnit.cpp:44:6:
error: type variant has different ‘TYPE_FIELDS’
[...]
/var/tmp/portage/llvm-core/llvm-20.1.0/work/llvm/lib/MCA/HardwareUnits/LSUnit.cpp:44:6:
internal compiler error: ‘verify_type’ failed
0x5b366fd43991 internal_error(char const*, ...)
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/diagnostic-global-context.cc:517
0x5b366e2dc3d8 verify_type(tree_node const*)
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree.cc:14607
0x5b366fe9ced8 gen_type_die_with_usage
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:26406
0x5b366fe9d273 gen_type_die_with_usage
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:26539
0x5b366fea806b gen_type_die
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:26637
0x5b366fea806b gen_formal_types_die
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:23285
0x5b366fe9a77c gen_subprogram_die
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:24136
0x5b366fe4e699 gen_decl_die
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:27254
0x5b366fea3ae8 gen_member_die
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:26089
0x5b366fea3ae8 gen_struct_or_union_type_die
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:26185
0x5b366fea3ae8 gen_tagged_type_die
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:26387
0x5b366fe9d241 gen_type_die_with_usage
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:26581
0x5b366fe97f2a gen_type_die
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:26637
0x5b366fe4e543 gen_decl_die
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:27277
0x5b366fe06a7c dwarf2out_decl
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:27835
0x5b366fe0670d dwarf2out_type_decl
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/dwarf2out.cc:27553
0x5b366fe8bc16 rest_of_type_compilation(tree_node*, int)
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/passes.cc:339
0x5b3670903dd3 note_debug_info_needed(tree_node*)
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/cp/search.cc:2436
0x5b3670902f9b maybe_emit_vtables
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/cp/decl2.cc:2758
0x5b366ff1801e c_parse_final_cleanups()
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/cp/decl2.cc:5557
```
---
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/15/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/15
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/15/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15
--disable-silent-rules --disable-dependency-tracking
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/15/python
--enable-objc-gc --enable-languages=c,c++,d,go,objc,obj-c++,fortran,ada,m2,rust
--enable-obsolete --enable-secureplt --disable-werror --with-system-zlib
--enable-nls --without-included-gettext --disable-libunwind-exceptions
--enable-checking=yes,extra,rtl --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo Hardened 15.0.9999 p, commit
c8efdd40e70884f82c463ad5cf4c44c9e01125c3' --with-gcc-major-version-only
--enable-libstdcxx-time --enable-lto --disable-libstdcxx-pch --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--enable-multilib --with-multilib-list=m32,m64 --disable-fixed-point
--enable-targets=all --enable-offload-defaulted
--enable-offload-targets=nvptx-none --enable-libgomp --disable-libssp
--enable-libada --disable-cet --disable-systemtap --enable-valgrind-annotations
--disable-vtable-verify --disable-libvtv --with-zstd --with-isl
--disable-isl-version-check --enable-default-pie --enable-host-pie
--enable-host-bind-now --enable-default-ssp --disable-fixincludes
--with-build-config='bootstrap-O3 bootstrap-lto'
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.1 20250303 (experimental)
2a502f9e4c5c6a8e908ef1b0b5c03fb2e4bd4390 (Gentoo Hardened 15.0.9999 p, commit
c8efdd40e70884f82c463ad5cf4c44c9e01125c3)
