https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114574
Bug ID: 114574
Summary: [14 regression] ICE when building curl with LTO
(internal compiler error: in fld_incomplete_type_of,
at ipa-free-lang-data.cc:257)
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
Target Milestone: ---
Created attachment 57861
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57861&action=edit
libcurl_la-curl_ntlm_core.i.xz
Tonnes of these failures. Just picked curl at random.
```
$ x86_64-pc-linux-gnu-gcc -m32 -mfpmath=sse -DHAVE_CONFIG_H
-I/var/tmp/portage/net-misc/curl-8.7.1-r1/work/curl-8.7.1/include -I../lib
-I/var/tmp/portage/net-misc/curl-8.7.1-r1/work/curl-8.7.1/lib
-DBUILDING_LIBCURL -DCURL_HIDDEN_SYMBOLS -fvisibility=hidden -O3 -pipe
-march=native -fdiagnostics-color=always -flto -fno-vect-cost-model
-fpermissive -Werror-implicit-function-declaration -c
/var/tmp/portage/net-misc/curl-8.7.1-r1/work/curl-8.7.1/lib/curl_ntlm_core.c
-fPIC -DPIC -o .libs/libcurl_la-curl_ntlm_core.o
during IPA pass: *free_lang_data
/var/tmp/portage/net-misc/curl-8.7.1-r1/work/curl-8.7.1/lib/curl_ntlm_core.c:665:1:
internal compiler error: in fld_incomplete_type_of, at
ipa-free-lang-data.cc:257
665 | }
| ^
0x55f1b9e2de0f fld_incomplete_type_of
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/ipa-free-lang-data.cc:257
0x55f1bb41a2ad fld_simplified_type
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/ipa-free-lang-data.cc:344
0x55f1bb41a2ad free_lang_data_in_type
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/ipa-free-lang-data.cc:439
0x55f1bbaa5ad0 free_lang_data_in_cgraph
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/ipa-free-lang-data.cc:1072
0x55f1bbaa5ad0 free_lang_data
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/ipa-free-lang-data.cc:1109
0x55f1bbaa5ad0 execute
/usr/src/debug/sys-devel/gcc-14.0.9999/gcc-14.0.9999/gcc/ipa-free-lang-data.cc:1176
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://bugs.gentoo.org/> for instructions.
```
'gcc -c libcurl_la-curl_ntlm_core.i -O2 -flto' is enough to reproduce. I last
built curl fine on 30th March, apparently.
```
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/14/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-14.0.9999/work/gcc-14.0.9999/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/14
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/14/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/14
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/14/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/14/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/14/include/g++-v14
--disable-silent-rules --disable-dependency-tracking
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/14/python
--enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --enable-nls --without-included-gettext
--disable-libunwind-exceptions --enable-checking=yes,extra,rtl,df
--with-bugurl=https://bugs.gentoo.org/ --with-pkgversion='Gentoo 14.0.9999 p,
commit 7bbfb01a32b73842f8908de028703510a0e12057' --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-libgomp --disable-libssp --disable-libada
--disable-cet --disable-systemtap --disable-valgrind-annotations
--disable-vtable-verify --disable-libvtv --with-zstd --without-isl
--enable-default-pie --enable-host-pie --disable-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 14.0.1 20240403 (experimental)
8455d6f6cd43b7b143ab9ee19437452fceba9cc9 (Gentoo 14.0.9999 p, commit
7bbfb01a32b73842f8908de028703510a0e12057)
```
