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Type inference(?) regression, rand fails to build on nightly 2016-01-04 #30713
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Also builds fine on 1.5.0 and 1.6.0-beta.1 |
@eddyb pointed out on IRC that the real culprit is the new impls at https://github.com/rust-lang/rust/pull/30523/files#diff-0cfd5773528ef167f36c81b535a97a3dR127 which should be commented again until #23545 is fixed. |
There's a fix in #30733. |
Nominating for some discussion, but if there already has been discussion and I missed out please feel free to un-nominate :) |
@alexcrichton We're currently waiting for a new nightly. |
@alexcrichton this was discussed informally on IRC: Previously, #23545 is about resolving the ambiguity somehow (maybe defaulting to |
Thanks for the info @eddyb and @SimonSapin! I'd personally prefer to keep those impls (e.g. not have anything commented out), but may be worth discussing and perhaps holding off that change until #23545 is handled. |
The libs team discussed this in triage yesterday and the conclusion was that the current state is where we'd like to be. We'll hold off on adding the relevant impls until #23545 is dealt with, and otherwise this has been fixed. |
The rand crate (rust-random/rand@4aa8f5b) builds correctly with rustc 1.7.0-nightly (8f11a9e 2016-01-03), but fails with rustc 1.7.0-nightly (d5e2290 2016-01-04):
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