https://issues.dlang.org/show_bug.cgi?id=19786
--- Comment #6 from Basile-z <[email protected]> --- I have an excellent news. Si I was rewriting TypeTraits semantic, decomposing all possible Expressions kinds wit the idea to filter out the invalid cases and then realized that TypeTraits semantic is not the issue **at all**. IN the original report, if you use the old way, i.e `AliasSeq`, then the same problem occurs, see https://run.dlang.io/is/PGzqGp. The bug more likely lies in __traits semantic. Sorry if my comment lead you in the wrong direction and good luck with the fix. --
