dmd 2.068 deducing purity

[Jack Applegame via Digitalmars-d-learn]

Using lambdas in 2.068 becomes painful:

>import std.algorithm;
>
>struct Foo {
>	int baz(int v) {
>		static int id;
>		return v + id++;
>	}
>	void bar() {
>		auto arr1 = [1, 2, 3];
>		auto arr2 = [4, 5, 6];
>		arr1.map!(i =>
>			arr2.map!(j => baz(i + j))
>		);
>	}
>}
>
>void main() {
>}

>Error: pure function 
>'bug.Foo.bar.__lambda1!int.__lambda1.__lambda2' cannot call 
>impure function 'bug.Foo.baz'

Also after switching to dmd 2.068 I got many stupid errors in 
lambdas (defined inside class non-static functions):

>Error: need 'this' for '...' of type '...'

I have no idea how to fix it and had to go back to 2.067.