Opened an issue here, github, ethereum, solidity, issue 1731: https://github.com/ethereum/solidity/issues/1731
If I understand their process correctly, original issue 1731 is closed by issue 1737 which is now merged. Possibly the compiler is going to emit an error for this sort of thing in the future.
Both thumbs up for the devs!
https://github.com/ethereum/solidity/pull/1737