[Solved] `Diesel` not compiling in nightly. What change could've done that?


#1

Is Diesel not compiling in nightly for anyone else? (rustc 1.28.0-nightly (990d8aa74 2018-05-25))
I am curious what change happened in nightly to prompt this error. It looks like a missing implementation error but missing implementation were never legal AFAIK.

error[E0277]: the trait bound `<expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Add` is not satisfied
  --> /Users/user/.cargo/registry/src/github.com-1ecc6299db9ec823/diesel-1.3.0/src/expression/count.rs:58:39
   |
58 | #[derive(Debug, Clone, Copy, QueryId, DieselNumericOps)]
   |                                       ^^^^^^^^^^^^^^^^ the trait `sql_types::ops::Add` is not implemented for `<expression::count::CountStar as expression::Expression>::SqlType`
   |
   = help: consider adding a `where <expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Add` bound
   = help: see issue #48214
   = help: add #![feature(trivial_bounds)] to the crate attributes to enable

error[E0277]: the trait bound `<expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Sub` is not satisfied
  --> /Users/user/.cargo/registry/src/github.com-1ecc6299db9ec823/diesel-1.3.0/src/expression/count.rs:58:39
   |
58 | #[derive(Debug, Clone, Copy, QueryId, DieselNumericOps)]
   |                                       ^^^^^^^^^^^^^^^^ the trait `sql_types::ops::Sub` is not implemented for `<expression::count::CountStar as expression::Expression>::SqlType`
   |
   = help: consider adding a `where <expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Sub` bound
   = help: see issue #48214
   = help: add #![feature(trivial_bounds)] to the crate attributes to enable

error[E0277]: the trait bound `<expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Mul` is not satisfied
  --> /Users/user/.cargo/registry/src/github.com-1ecc6299db9ec823/diesel-1.3.0/src/expression/count.rs:58:39
   |
58 | #[derive(Debug, Clone, Copy, QueryId, DieselNumericOps)]
   |                                       ^^^^^^^^^^^^^^^^ the trait `sql_types::ops::Mul` is not implemented for `<expression::count::CountStar as expression::Expression>::SqlType`
   |
   = help: consider adding a `where <expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Mul` bound
   = help: see issue #48214
   = help: add #![feature(trivial_bounds)] to the crate attributes to enable

error[E0277]: the trait bound `<expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Div` is not satisfied
  --> /Users/user/.cargo/registry/src/github.com-1ecc6299db9ec823/diesel-1.3.0/src/expression/count.rs:58:39
   |
58 | #[derive(Debug, Clone, Copy, QueryId, DieselNumericOps)]
   |                                       ^^^^^^^^^^^^^^^^ the trait `sql_types::ops::Div` is not implemented for `<expression::count::CountStar as expression::Expression>::SqlType`
   |
   = help: consider adding a `where <expression::count::CountStar as expression::Expression>::SqlType: sql_types::ops::Div` bound
   = help: see issue #48214
   = help: add #![feature(trivial_bounds)] to the crate attributes to enable

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0277`.
error: Could not compile `diesel`.

To learn more, run the command again with --verbose.

#2

Better to create an issue on the diesel repo


#3

Nevermind. It’s an issue in nightly.



#4

Is it me or has the quality of rustc and/or LLVM been going down lately?
I ask because I am having a stability issue of my own on stable(!!) rust, and this seems to be happening not long after.