Fix for #31267 and additional zero-width constant bug#31326

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bors merged 2 commits intorust-lang:masterfrom

sdleffler:master

Feb 4, 2016

Commits on Jan 31, 2016

Fix 31267, add rpass tests
sdleffler
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Commits on Feb 2, 2016

Added assertion ensuring zero-sized type.
sdleffler
committed