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select: treat ErrorCandidate as a real error #29954

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select: treat ErrorCandidate as a real error #29954

wants to merge 2 commits into from

Commits on Nov 25, 2015

  1. select: treat ErrorCandidate as a real error 

    Otherwise, projection can result in type errors that are unified
into the trait inputs. We should probably refactor the
`normalize_to_error` mess.
    @arielb1
    arielb1 authored and Ariel Ben-Yehuda committed Nov 25, 2015
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  2. improve cast handling - this fixes test failures 

    the problem is that now "type_is_known_to_be_sized" now returns
false when called on a type with ty_err inside - this prevents
spurious errors (we may want to move the check to check::cast
anyway - see rust-lang#12894).
    Ariel Ben-Yehuda committed Nov 25, 2015
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