[Bug c++/89050] New: GCC sometimes requires this to be captured when doing overload resolution but selecting a static member function

[m101010a at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89050

            Bug ID: 89050
           Summary: GCC sometimes requires this to be captured when doing
                    overload resolution but selecting a static member
                    function
           Product: gcc
           Version: 8.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: m101010a at gmail dot com
  Target Milestone: ---

$ cat x.cpp
template <class T> struct A {
    static void f();
    void f(int);

    void foo() {
        []{ f(); };
    }
};

void foo(A<int> &a) {
    a.foo();
}
$ g++ -fsyntax-only x.cpp
x.cpp: In lambda function:
x.cpp:6:15: error: ‘this’ was not captured for this lambda function
         []{ f(); };
               ^
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
--enable-cet=auto
Thread model: posix
gcc version 8.2.1 20181127 (GCC)

If A is not a template or there is no competing non-static member named f, this
works fine.  This is basically bug 51494 but with templates and overload
resolution.