https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125539
Bug ID: 125539
Summary: ICE on define_aggregate in comma expression
Product: gcc
Version: 16.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: programmer00001h at gmail dot com
Target Milestone: ---
Created attachment 64601
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64601&action=edit
output of -freport-bug
GCC crashes for the following code (preprocessed version attached):
#include<meta>
struct empty{};
struct X;
template<typename T>
constexpr static empty n = (define_aggregate(^^X,{}),empty{});
The compile command is `g++ -std=c++26 -freflection ice.cpp`. Note that
replacing `empty` with `int` seems to make the error go away.
(I'm pretty sure this is illegal code, since define_aggregate isn't called in a
consteval block.)
Output of gcc -v:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/16.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure
--enable-languages=ada,c,c++,d,fortran,go,lto,m2,objc,obj-c++,rust,cobol
--enable-bootstrap --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://gitlab.archlinux.org/archlinux/packaging/packages/gcc/-/issues
--with-build-config=bootstrap-lto --with-linker-hash-style=gnu
--with-system-zlib --enable-cet=auto --enable-checking=release
--enable-clocale=gnu --enable-default-pie --enable-default-ssp
--enable-gnu-indirect-function --enable-gnu-unique-object
--enable-libstdcxx-backtrace --enable-link-serialization=1
--enable-linker-build-id --enable-lto --enable-multilib --enable-plugin
--enable-shared --enable-threads=posix --disable-libssp --disable-libstdcxx-pch
--disable-werror --disable-fixincludes
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 16.1.1 20260430 (GCC)
