https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114804
Bug ID: 114804
Summary: rejects valid code
Product: gcc
Version: 13.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: wdehnen64 at gmail dot com
Target Milestone: ---
gcc fails to compile the following
===test.cc===
template<int D> struct blurb
{ constexpr static int d=D; };
template<typename> struct pant
{ int foo=0; };
template<typename Base>
struct bug : Base
{
using base = Base;
using base::d;
using tool = blurb<d>;
struct problem : pant<tool> { using pant<tool>::foo; };
void bar() const { problem b; }
};
template struct bug< blurb<2> >;
===Terminal===
> gcc-13 src/bug.cc -c
src/bug.cc: In instantiation of 'struct bug<blurb<2> >::problem':
src/bug.cc:17:17: required from here
src/bug.cc:13:12: error: 'd' was not declared in this scope
13 | struct problem : pant<tool> { using pant<tool>::foo; };
| ^~~~~~~
src/bug.cc:13:53: error: type 'pant<blurb<2> >' is not a base type for type
'bug<blurb<2> >::problem'
13 | struct problem : pant<tool> { using pant<tool>::foo; };
| ^~~
===Note===
last version known to be correct: gcc-10.5.0 (gcc-11, gcc-12 also fail)
===Version===
> g++-13 -v
Using built-in specs.
COLLECT_GCC=g++-13
COLLECT_LTO_WRAPPER=/usr/local/Cellar/gcc/13.2.0/bin/../libexec/gcc/x86_64-apple-darwin23/13/lto-wrapper
Target: x86_64-apple-darwin23
Configured with: ../configure --prefix=/usr/local/opt/gcc
--libdir=/usr/local/opt/gcc/lib/gcc/current --disable-nls
--enable-checking=release --with-gcc-major-version-only
--enable-languages=c,c++,objc,obj-c++,fortran --program-suffix=-13
--with-gmp=/usr/local/opt/gmp --with-mpfr=/usr/local/opt/mpfr
--with-mpc=/usr/local/opt/libmpc --with-isl=/usr/local/opt/isl
--with-zstd=/usr/local/opt/zstd --with-pkgversion='Homebrew GCC 13.2.0'
--with-bugurl=https://github.com/Homebrew/homebrew-core/issues
--with-system-zlib --build=x86_64-apple-darwin23
--with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.2.0 (Homebrew GCC 13.2.0)
