[Bug c++/98802] New: class template argument deduce guide leads infinite recursive.

[netcan1996 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98802

            Bug ID: 98802
           Summary: class template argument deduce guide leads infinite
                    recursive.
           Product: gcc
           Version: 10.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: netcan1996 at gmail dot com
  Target Milestone: ---

code here:
https://godbolt.org/z/8W7dK5

#include <iostream>
#include <utility>
using namespace std;

template<typename T, size_t N = 0>
struct List {
    T head;
    List<T, N-1> tail;
};

template<typename T>
struct List<T, 0> {};

template<typename T> List(T) -> List<T, 1>;
template<typename T, size_t N> List(T, List<T, N>) -> List<T, N+1>;

template<size_t N>
using IntList = List<int, N>;

int main(int argc, char** argv) {
    auto list1 = IntList<2>{0, IntList<1>{1, IntList<0>{}}};
    auto list2 = List{0, List{1, List{2}}};

    return 0;
}


error info:

<source>: In instantiation of 'struct List<int, 18446744073709550716>':
<source>:8:18:   recursively required from 'struct List<int,
18446744073709551614>'
<source>:8:18:   required from 'struct List<int, 18446744073709551615>'
<source>:22:41:   required from here
<source>:8:18: fatal error: template instantiation depth exceeds maximum of 900
(use '-ftemplate-depth=' to increase the maximum)
    8 |     List<T, N-1> tail;
      |                  ^~~~
compilation terminated.
Compiler returned: 1

$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/10/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 10.2.1-6'
--with-bugurl=file:///usr/share/doc/gcc-10/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,m2 --prefix=/usr
--with-gcc-major-version-only --program-suffix=-10
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib
--enable-libphobos-checking=release --with-target-system-zlib=auto
--enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic
--enable-offload-targets=nvptx-none=/build/gcc-10-Km9U7s/gcc-10-10.2.1/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-10-Km9U7s/gcc-10-10.2.1/debian/tmp-gcn/usr,hsa
--without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
--with-build-config=bootstrap-lto-lean --enable-link-mutex
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.2.1 20210110 (Debian 10.2.1-6)

but it work normal in clang.