lambda alias import

[JN via Digitalmars-d-learn]

stuff.d:

alias doStuff = () {};
main.d:

import stuff;

void main()
{
  doStuff();
}


DMD throws compile error:

 Error 42: Symbol Undefined __D5stuff9__lambda3FNaNbNiNfZv

Is this expected behavior? It tripped me while trying to use 
DerelictVulkan :(