[Bug c++/87750] [8/9 Regression] Failed compilation / parsing of template member call after 'using' declaration

[mark.atkinson99 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87750

--- Comment #2 from Mark Atkinson <mark.atkinson99 at gmail dot com> ---
Created attachment 44906
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44906&action=edit
Bug repro (godbolt link copy-paste)