https://issues.dlang.org/show_bug.cgi?id=22706
Issue ID: 22706 Summary: Bad error message when trying to explicitly instantiate a function template with an auto ref parameter Product: D Version: D2 Hardware: All OS: All Status: NEW Severity: minor Priority: P1 Component: dmd Assignee: nob...@puremagic.com Reporter: spoov0....@gmail.com ### test.d ### void foo(T)(auto ref T arg) {} alias bar = foo!int; produces the error message: test.d(1): Error: `auto` can only be used as part of `auto ref` for template function parameters test.d(2): Error: template instance `test.foo!int` error instantiating which makes not much sense. The message should instead explain that it is not possible to decide if arg is passed by ref or not. --