Foreach type infering only works up to 2 levels?

[Andrej Mitrovic]

int[][][][] multiArray;

void main()
{
    foreach (one, two; multiArray)  // ok
    {
    }
    
    foreach (one, two, three; multiArray)  // fail
    {
    }    
}

test.d(13): Error: cannot infer type for two
test.d(13): Error: cannot infer type for three

Same thing happens with hashes as well. Is this a limitation in the language or 
a bug?