stabilize `#[must_use]` for functions and must-use comparison operators (RFC 1940)#48925

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zackmdavis:fn_must_stabilize

May 1, 2018

Commits on Apr 29, 2018

in which the fn-must-use codepath is prevented from panicking on closure
zackmdavis
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stabilize `#[must_use]` for functions and must-use operators
zackmdavis
committed