Regarding Issue 9423

[bearophile]

Currently you are allowed to write a lambda literal as in line 3, 
but you can't omit "ref" as in line 4:


void foo(int delegate(ref int[1]) spam) {}
void main() {
     foo((ref x) => 0); // line3, OK
     foo(x => 0); // line4, Error
}


Do you think "ref" annotation should be required at the call site?

This is the Bugzilla thread. Hara has already implemented the 
"ref" inference, but he's not sure if it's a good idea:

http://d.puremagic.com/issues/show_bug.cgi?id=9423

Bye,
bearophile