Cannot automatically derive equality for structures implementing the drop trait.

[mstewartgallus]

In the latest incoming (last commit 270b508) the compiler gives an error when one tries to automatically derive equality for structures implementing the Drop trait. This error is:

error: deconstructing struct not allowed in pattern (it has a destructor)

[huonw]

Hm, I caused this, and I know what the problem is (the deriving code performs a match on every argument).