Commits on Apr 15, 2018

1. don't see issue #0 …

   The unstable-feature attribute requires an issue (neglecting it is
   E0547), which gets used in the error messages. Unfortunately, there are
   some cases where "0" is apparently used a placeholder where no issue
   exists, directing the user to see the (nonexistent) issue #0. (It would
   have been better to either let `issue` be optional—compare to how issue
   is an `Option<u32>` in the feature-gate declarations in
   libsyntax/feature-gate.rs—or actually require that an issue be created.)
   Rather than endeavoring to change how `#[unstable]` works at this time
   (given competing contributor and reviewer priorities), this simple patch
   proposes the less-ambitious solution of just not adding the "(see
   issue)" note when the number is zero.
   
   Resolves rust-lang#49983.

   

   zackmdavis committed Apr 15, 2018
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