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Improve bug! message for impossible case in Relate

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Hitting this branch in Clippy and I think it makes sense to print
both values here in case other people hit this branch, too.
This commit is contained in:
Philipp Hansch 2018-09-29 08:04:34 +02:00
parent 6622172734
commit d654e3c69b
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1 changed files with 6 additions and 1 deletions
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7
src/librustc/ty/relate.rs
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@ -702,7 +702,12 @@ impl<'tcx> Relate<'tcx> for Kind<'tcx> {
(UnpackedKind::Type(a_ty), UnpackedKind::Type(b_ty)) => {
Ok(relation.relate(&a_ty, &b_ty)?.into())
}
(UnpackedKind::Lifetime(_), _) | (UnpackedKind::Type(_), _) => bug!()
(UnpackedKind::Lifetime(unpacked), x) => {
bug!("impossible case reached: can't relate: {:?} with {:?}", unpacked, x)
}
(UnpackedKind::Type(unpacked), x) => {
bug!("impossible case reached: can't relate: {:?} with {:?}", unpacked, x)
}
}
}
}