Fix trans coercions of Box<[T]> and Box<Trait> in match arms#21692

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bors merged 3 commits intorust-lang:masterfrom

pnkfelix:fsk-fix-coerce-match-20055

Jan 30, 2015

Commits on Jan 27, 2015

trans: When coercing to `Box<Trait>` or `Box<[T]>`, leave datum in its original L-/R-value state.
pnkfelix
committed
Test cases for issue #20055.
pnkfelix
committed

Commits on Jan 28, 2015

In unsize_unique_expr, do not convert scratch value to lvalue.
pnkfelix
committed