Bug 15564 – Bogus non local error messages

src/main.d(22): Error: template instance query!(function Inv(h) { ubyte[32] stop; h.send(GetBlocks(60002, [], stop)); return h.receive!Inv(); } , ) cannot use local '__funcliteral1' as parameter to non-global template query(alias f, T...)(T args) That's a function.

The query method : auto query(alias f, T...)(T args) shared { auto s = acquireSocket(); scope(exit) releaseSocket(s); return f(Host(config, s), args); }

Is this a regression? Does it affect any function literal?

All function literals. It is also in the release so no regression, but it is a major blocker :)

cat > bug.d << CODE struct Foo { void foo(alias f)() { f(2); } } void test() { Foo foo; foo.foo!(function(int a) => 2 * a)(); // works w/ function foo.foo!(function(a) => 2 * a)(); // doesn't work w/ function template } CODE dmd -c bug ---- bug.d(13): Error: template instance foo!(function (a) => 2 * a) cannot use local '__funcliteral1' as parameter to non-global template foo(alias f)() ---- This was already not possible in 2.066.1.

The underlying issue here seems to be issue 5710, which is fixed.