[Bug c++/61471] redeclaration of default-argument in function template declaration not caught

[filip.roseen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61471

--- Comment #1 from Filip Roséen <filip.roseen at gmail dot com> ---
Created attachment 32922
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32922&action=edit
testcase-real.cpp

The previously attached `testcase.cpp` contains a code snippet for a related,
but different, bug.

See the newly attached testcase.cpp for contents matching the code in the
original post.