Why D const is annoying

[Mehrdad]

... and another... (yes, this one _IS_ a const issue)

struct S { int opApply(scope int delegate(ref inout(int)) dg) inout { 
return 0; } }
void main()
{
     foreach (i; S()) { }
}

Error: inout on parameter means inout must be on return type as well (if 
from D1 code, replace with 'ref')

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I'll go sleep now... but I could probably go on for a while more. I'll 
try to post more of these bugs when I get the chance (assuming they're 
welcome...).