https://issues.dlang.org/show_bug.cgi?id=17661
Andrei Alexandrescu <and...@erdani.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |and...@erdani.com --- Comment #1 from Andrei Alexandrescu <and...@erdani.com> --- Can you try replacing the clause is(typeof((R r) => r.front)) with is(typeof((R r) => r.front)) || is(typeof((R r) return => r.front)) ? If that works you may want to create a PR with it. Thanks! --