[Bug c++/109781] [11/12/13/14 Regression] erroneous error "lambda-expression in template parameter type" for tparam lambda returning a lambda

[johelegp at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109781

--- Comment #4 from Johel Ernesto Guerrero Peña <johelegp at gmail dot com> ---
This isn't valid since <https://cplusplus.github.io/CWG/issues/2542.html>.