[INFO] crate flatten 0.2.2 is already in cache
[INFO] checking flatten-0.2.2 against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] extracting crate flatten 0.2.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate flatten 0.2.2 on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate flatten 0.2.2
[INFO] finished tweaking crates.io crate flatten 0.2.2
[INFO] tweaked toml for crates.io crate flatten 0.2.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 03ebd4e2f160bd9a62a012183599cfa26b1274ea5008dd44cce593b9aae32cb1
[INFO] running `"docker" "start" "-a" "03ebd4e2f160bd9a62a012183599cfa26b1274ea5008dd44cce593b9aae32cb1"`
[INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[INFO] [stderr]     Checking flatten v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/lib.rs:1:34
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)]
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stderr] 
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/lib.rs:1:34
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)]
[INFO] [stderr]   |                                  ^^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> src/cons/mod.rs:24:6
[INFO] [stderr]    |
[INFO] [stderr] 24 | impl !ValidHead for Nil {}
[INFO] [stderr]    |      ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]    = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> src/cons/mod.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 | impl<H, T> !ValidHead for Cons<H, T> {}
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]    = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:153:6
[INFO] [stderr]     |
[INFO] [stderr] 153 | impl !NotTuple for () {}
[INFO] [stderr]     |      ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:154:9
[INFO] [stderr]     |
[INFO] [stderr] 154 | impl<A> !NotTuple for (A,) {}
[INFO] [stderr]     |         ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:155:9
[INFO] [stderr]     |
[INFO] [stderr] 155 | impl<R> !NotTuple for Either<!, R> {}
[INFO] [stderr]     |         ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 248 | / impl_for_tuple! {
[INFO] [stderr] 249 | |    (0, A),
[INFO] [stderr] 250 | |    (1, B),
[INFO] [stderr] 251 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 253 | / impl_for_tuple! {
[INFO] [stderr] 254 | |    (0, A),
[INFO] [stderr] 255 | |    (1, B),
[INFO] [stderr] 256 | |    (2, C),
[INFO] [stderr] 257 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 259 | / impl_for_tuple! {
[INFO] [stderr] 260 | |    (0, A),
[INFO] [stderr] 261 | |    (1, B),
[INFO] [stderr] 262 | |    (2, C),
[INFO] [stderr] 263 | |    (3, D),
[INFO] [stderr] 264 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 266 | / impl_for_tuple! {
[INFO] [stderr] 267 | |    (0, A),
[INFO] [stderr] 268 | |    (1, B),
[INFO] [stderr] 269 | |    (2, C),
[INFO] [stderr] 270 | |    (3, D),
[INFO] [stderr] 271 | |    (4, E),
[INFO] [stderr] 272 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 274 | / impl_for_tuple! {
[INFO] [stderr] 275 | |    (0, A),
[INFO] [stderr] 276 | |    (1, B),
[INFO] [stderr] 277 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 280 | |    (5, F),
[INFO] [stderr] 281 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 283 | / impl_for_tuple! {
[INFO] [stderr] 284 | |    (0, A),
[INFO] [stderr] 285 | |    (1, B),
[INFO] [stderr] 286 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 290 | |    (6, G),
[INFO] [stderr] 291 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 293 | / impl_for_tuple! {
[INFO] [stderr] 294 | |    (0, A),
[INFO] [stderr] 295 | |    (1, B),
[INFO] [stderr] 296 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 301 | |    (7, H),
[INFO] [stderr] 302 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 304 | / impl_for_tuple! {
[INFO] [stderr] 305 | |    (0, A),
[INFO] [stderr] 306 | |    (1, B),
[INFO] [stderr] 307 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 313 | |    (8, I),
[INFO] [stderr] 314 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 316 | / impl_for_tuple! {
[INFO] [stderr] 317 | |    (0, A),
[INFO] [stderr] 318 | |    (1, B),
[INFO] [stderr] 319 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 326 | |    (9, J),
[INFO] [stderr] 327 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 329 | / impl_for_tuple! {
[INFO] [stderr] 330 | |    (0, A),
[INFO] [stderr] 331 | |    (1, B),
[INFO] [stderr] 332 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 340 | |    (10, K),
[INFO] [stderr] 341 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 343 | / impl_for_tuple! {
[INFO] [stderr] 344 | |    (0, A),
[INFO] [stderr] 345 | |    (1, B),
[INFO] [stderr] 346 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 355 | |    (11, L),
[INFO] [stderr] 356 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: this is an internal attribute that will never be stable
[INFO] [stderr]   --> src/tuple.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | / #[rustc_on_unimplemented = "
[INFO] [stderr] 19 | | If you are writing generic code, add a bound like
[INFO] [stderr] 20 | |
[INFO] [stderr] 21 | |     where {OrigType}: Flatten,
[INFO] [stderr] ...  |
[INFO] [stderr] 31 | |
[INFO] [stderr] 32 | | This is required because current type system does not have negative reasoning."]
[INFO] [stderr]    | |________________________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/into_cons.rs:234:21
[INFO] [stderr]     |
[INFO] [stderr] 234 |                       ( $( $N ),* )
[INFO] [stderr]     |                       ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] ...
[INFO] [stderr] 248 | / impl_for_tuple! {
[INFO] [stderr] 249 | |    (0, A),
[INFO] [stderr] 250 | |    (1, B),
[INFO] [stderr] 251 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/tuple.rs:185:9
[INFO] [stderr]     |
[INFO] [stderr] 185 |         (self.head)
[INFO] [stderr]     |         ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> src/cons/mod.rs:24:6
[INFO] [stderr]    |
[INFO] [stderr] 24 | impl !ValidHead for Nil {}
[INFO] [stderr]    |      ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]    = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]   --> src/cons/mod.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 | impl<H, T> !ValidHead for Cons<H, T> {}
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]    = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:153:6
[INFO] [stderr]     |
[INFO] [stderr] 153 | impl !NotTuple for () {}
[INFO] [stderr]     |      ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:154:9
[INFO] [stderr]     |
[INFO] [stderr] 154 | impl<A> !NotTuple for (A,) {}
[INFO] [stderr]     |         ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:155:9
[INFO] [stderr]     |
[INFO] [stderr] 155 | impl<R> !NotTuple for Either<!, R> {}
[INFO] [stderr]     |         ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 248 | / impl_for_tuple! {
[INFO] [stderr] 249 | |    (0, A),
[INFO] [stderr] 250 | |    (1, B),
[INFO] [stderr] 251 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 253 | / impl_for_tuple! {
[INFO] [stderr] 254 | |    (0, A),
[INFO] [stderr] 255 | |    (1, B),
[INFO] [stderr] 256 | |    (2, C),
[INFO] [stderr] 257 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 259 | / impl_for_tuple! {
[INFO] [stderr] 260 | |    (0, A),
[INFO] [stderr] 261 | |    (1, B),
[INFO] [stderr] 262 | |    (2, C),
[INFO] [stderr] 263 | |    (3, D),
[INFO] [stderr] 264 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 266 | / impl_for_tuple! {
[INFO] [stderr] 267 | |    (0, A),
[INFO] [stderr] 268 | |    (1, B),
[INFO] [stderr] 269 | |    (2, C),
[INFO] [stderr] 270 | |    (3, D),
[INFO] [stderr] 271 | |    (4, E),
[INFO] [stderr] 272 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 274 | / impl_for_tuple! {
[INFO] [stderr] 275 | |    (0, A),
[INFO] [stderr] 276 | |    (1, B),
[INFO] [stderr] 277 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 280 | |    (5, F),
[INFO] [stderr] 281 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 283 | / impl_for_tuple! {
[INFO] [stderr] 284 | |    (0, A),
[INFO] [stderr] 285 | |    (1, B),
[INFO] [stderr] 286 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 290 | |    (6, G),
[INFO] [stderr] 291 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 293 | / impl_for_tuple! {
[INFO] [stderr] 294 | |    (0, A),
[INFO] [stderr] 295 | |    (1, B),
[INFO] [stderr] 296 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 301 | |    (7, H),
[INFO] [stderr] 302 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 304 | / impl_for_tuple! {
[INFO] [stderr] 305 | |    (0, A),
[INFO] [stderr] 306 | |    (1, B),
[INFO] [stderr] 307 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 313 | |    (8, I),
[INFO] [stderr] 314 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 316 | / impl_for_tuple! {
[INFO] [stderr] 317 | |    (0, A),
[INFO] [stderr] 318 | |    (1, B),
[INFO] [stderr] 319 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 326 | |    (9, J),
[INFO] [stderr] 327 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 329 | / impl_for_tuple! {
[INFO] [stderr] 330 | |    (0, A),
[INFO] [stderr] 331 | |    (1, B),
[INFO] [stderr] 332 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 340 | |    (10, K),
[INFO] [stderr] 341 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: negative trait bounds are not yet fully implemented; use marker types for now
[INFO] [stderr]    --> src/into_cons.rs:218:36
[INFO] [stderr]     |
[INFO] [stderr] 218 |           impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {}
[INFO] [stderr]     |                                      ^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 343 | / impl_for_tuple! {
[INFO] [stderr] 344 | |    (0, A),
[INFO] [stderr] 345 | |    (1, B),
[INFO] [stderr] 346 | |    (2, C),
[INFO] [stderr] ...   |
[INFO] [stderr] 355 | |    (11, L),
[INFO] [stderr] 356 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: see issue #68318 <https://github.com/rust-lang/rust/issues/68318> for more information
[INFO] [stderr]     = help: add `#![feature(negative_impls)]` to the crate attributes to enable
[INFO] [stderr]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: this is an internal attribute that will never be stable
[INFO] [stderr]   --> src/tuple.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | / #[rustc_on_unimplemented = "
[INFO] [stderr] 19 | | If you are writing generic code, add a bound like
[INFO] [stderr] 20 | |
[INFO] [stderr] 21 | |     where {OrigType}: Flatten,
[INFO] [stderr] ...  |
[INFO] [stderr] 31 | |
[INFO] [stderr] 32 | | This is required because current type system does not have negative reasoning."]
[INFO] [stderr]    | |________________________________________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/into_cons.rs:234:21
[INFO] [stderr]     |
[INFO] [stderr] 234 |                       ( $( $N ),* )
[INFO] [stderr]     |                       ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] ...
[INFO] [stderr] 248 | / impl_for_tuple! {
[INFO] [stderr] 249 | |    (0, A),
[INFO] [stderr] 250 | |    (1, B),
[INFO] [stderr] 251 | | }
[INFO] [stderr]     | |_- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/tuple.rs:185:9
[INFO] [stderr]     |
[INFO] [stderr] 185 |         (self.head)
[INFO] [stderr]     |         ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 18 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0557, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0557`.
[INFO] [stderr] error: could not compile `flatten`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 18 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0557, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0557`.
[INFO] [stderr] error: could not compile `flatten`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "03ebd4e2f160bd9a62a012183599cfa26b1274ea5008dd44cce593b9aae32cb1"`
[INFO] running `"docker" "rm" "-f" "03ebd4e2f160bd9a62a012183599cfa26b1274ea5008dd44cce593b9aae32cb1"`
[INFO] [stdout] 03ebd4e2f160bd9a62a012183599cfa26b1274ea5008dd44cce593b9aae32cb1
