https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126188
--- Comment #2 from Björn Schäpers <gcc at hazardy dot de> --- Well if it is really a bug or not I can't tell. But it feels like one, because right now I can't check if the lambda could be instantiated with the parameters, without getting a compilation error. I take callable as template and want to make sure that it can be used with one of five possible parameter sets.
