Using inout in delegates

[Jacob Carlborg]

void foo (inout int[] arr)
{
    auto a = { auto b = arr[0]; };
}
void main ()
{
    auto a = [3, 4, 5];
    foo(a);
}

Compiling the above code with DMD 2.060 results in the following error 
message:

Error: variable main.foo.__lambda1.b inout variables can only be 
declared inside inout functions
Failed: /Users/jacob/.dvm/bin/dvm-current-dc  -v -o- 
'/Users/jacob/development/d/main.d' -I'/Users/jacob/development/d' 
>/Users/jacob/development/d/main.d.deps

Is this a bug, a limitation of inout/delegate or am I doing something 
else wrong?

--
/Jacob Carlborg