[Bug c++/95222] GCC 10.1 x86 issue with function pointers with calling convention attribute and template specialization

[raptorfactor at raptorfactor dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95222

--- Comment #1 from raptorfactor at raptorfactor dot com ---
$ g++ -v
Using built-in specs.
COLLECT_GCC=C:\Redacted\msys2-x86_64-rolling\mingw32\bin\g++.exe
COLLECT_LTO_WRAPPER=C:/Redacted/msys2-x86_64-rolling/mingw32/bin/../lib/gcc/i686-w64-mingw32/10.1.0/lto-wrapper.exe
Target: i686-w64-mingw32
Configured with: ../gcc-10.1.0/configure --prefix=/mingw32
--with-local-prefix=/mingw32/local --build=i686-w64-mingw32
--host=i686-w64-mingw32 --target=i686-w64-mingw32
--with-native-system-header-dir=/mingw32/i686-w64-mingw32/include
--libexecdir=/mingw32/lib --enable-bootstrap --with-arch=i686
--with-tune=generic --enable-languages=c,lto,c++,fortran,ada,objc,obj-c++
--enable-shared --enable-static --enable-libatomic --enable-threads=posix
--enable-graphite --enable-fully-dynamic-string
--enable-libstdcxx-filesystem-ts=yes --enable-libstdcxx-time=yes
--disable-libstdcxx-pch --disable-libstdcxx-debug --disable-isl-version-check
--enable-lto --enable-libgomp --disable-multilib --enable-checking=release
--disable-rpath --disable-win32-registry --disable-nls --disable-werror
--disable-symvers --disable-plugin --with-libiconv --with-system-zlib
--with-gmp=/mingw32 --with-mpfr=/mingw32 --with-mpc=/mingw32
--with-isl=/mingw32 --with-pkgversion='Rev2, Built by MSYS2 project'
--with-bugurl=https://sourceforge.net/projects/msys2 --with-gnu-as
--with-gnu-ld --disable-sjlj-exceptions --with-dwarf2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.1.0 (Rev2, Built by MSYS2 project)