Bug 4246 – Delegate literals passed to variadic templates function incorrectly

I found this while playing with delegate literals and map. Thankfully, map and non-variadic templates don't compile with delegate literals, but this example does: import std.stdio: writeln; import std.range; import std.algorithm; template bar(fun...) { auto bar(int[] r) { return fun[0](r.front); } } void main(string[] args) { int[] x = [1,2,3,4,5]; int y = 6; auto dg = (int t){ return t + y; }; auto list = bar!( dg )(x); auto list2 = bar!( (int t){ return t + y; } )(x); writeln(list,'\t',list2); return; } This prints out the correct value (7) when a delegate is passed in, but the delegate literal call results in a random printed number.

I think this used to work: import std.algorithm; void main() { auto arr = [1, 2, 3]; auto xr1 = map!("a * a")(arr); // OK auto xr2 = map!((int x){ return x * x; })(arr); // ERR auto xr3 = map!((x){ return x * x; })(arr); // ERR }

Reduced test case. Applies to D1 also, as far back as DMD0.175. Not a regression. ------------- int bug4246(fun...)() { return fun[0](7); } void main() { assert( 7 == bug4246!( (int t){ return t; } )() ); }

*** Issue 4359 has been marked as a duplicate of this issue. ***

*** This issue has been marked as a duplicate of issue 1350 ***