std.algorithm.map with multiple lambdas (2.066.0-b1) (does not compile)

[via Digitalmars-d-learn]

This is an instance of these bugs:

https://issues.dlang.org/show_bug.cgi?id=5710
https://issues.dlang.org/show_bug.cgi?id=11946

But seeing that `map` works with a single lambda/local function, 
it should be possible to make it work with several ones too.

For the time being, a simple workaround is to make the local 
functions static:

void main() {
     static int square(int i) { return i*i; }
     static int twoTimes(int i) { return i+i; }
     import std.algorithm, std.stdio;
     auto arr = [1,2,3];
     arr.map!(twoTimes, square).writeln;
}