Fix evaluating trivial drop glue in constants#57734

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bors merged 3 commits intorust-lang:masterfrom

oli-obk:fixes_and_cleanups

Jan 26, 2019

Commits on Jan 18, 2019

Commits on Jan 25, 2019

Add a compile-fail test for `Drop` in constants in the presence of `Option`s
oli-obk
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