[INFO] fetching crate flatten 0.2.2... [INFO] testing flatten-0.2.2 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0 [INFO] extracting crate flatten 0.2.2 into /workspace/builds/worker-4-tc1/source [INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain [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-4-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate flatten 0.2.2 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 1 package to latest compatible version [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`? [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] d19344028fde0a14ab528d1d3eb27cdbb2ad5c599c22b22d623de0e558c95b79 [INFO] running `Command { std: "docker" "start" "-a" "d19344028fde0a14ab528d1d3eb27cdbb2ad5c599c22b22d623de0e558c95b79", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "d19344028fde0a14ab528d1d3eb27cdbb2ad5c599c22b22d623de0e558c95b79", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d19344028fde0a14ab528d1d3eb27cdbb2ad5c599c22b22d623de0e558c95b79", kill_on_drop: false }` [INFO] [stdout] d19344028fde0a14ab528d1d3eb27cdbb2ad5c599c22b22d623de0e558c95b79 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }` [INFO] [stdout] 7bfce996ce9c52d762a7440c3ea9c9ef91e5a9d59be309b6a6dd4eb856d30f6b [INFO] running `Command { std: "docker" "start" "-a" "7bfce996ce9c52d762a7440c3ea9c9ef91e5a9d59be309b6a6dd4eb856d30f6b", kill_on_drop: false }` [INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024 [INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`? [INFO] [stderr] Compiling either v1.15.0 [INFO] [stderr] Compiling flatten v0.2.2 (/opt/rustwide/workdir) [INFO] [stdout] error[E0557]: feature has been removed [INFO] [stdout] --> src/lib.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ feature has been removed [INFO] [stdout] | [INFO] [stdout] = note: removed in 1.50.0 (you are using 1.89.0-nightly (8de4c7234 2025-06-19)); see for more information [INFO] [stdout] = note: renamed to `auto_traits` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0557]: feature has been removed [INFO] [stdout] --> src/lib.rs:1:34 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^ feature has been removed [INFO] [stdout] | [INFO] [stdout] = note: removed in 1.40.0 (you are using 1.89.0-nightly (8de4c7234 2025-06-19)); see for more information [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy [INFO] [stdout] --> src/cons/mod.rs:23:1 [INFO] [stdout] | [INFO] [stdout] 23 | pub auto trait ValidHead {} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #13231 for more information [INFO] [stdout] = help: add `#![feature(auto_traits)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/cons/mod.rs:24:6 [INFO] [stdout] | [INFO] [stdout] 24 | impl !ValidHead for Nil {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/cons/mod.rs:25:12 [INFO] [stdout] | [INFO] [stdout] 25 | impl !ValidHead for Cons {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: auto traits are experimental and possibly buggy [INFO] [stdout] --> src/into_cons.rs:152:1 [INFO] [stdout] | [INFO] [stdout] 152 | pub auto trait NotTuple {} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #13231 for more information [INFO] [stdout] = help: add `#![feature(auto_traits)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:153:6 [INFO] [stdout] | [INFO] [stdout] 153 | impl !NotTuple for () {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:154:9 [INFO] [stdout] | [INFO] [stdout] 154 | impl !NotTuple for (A,) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:155:9 [INFO] [stdout] | [INFO] [stdout] 155 | impl !NotTuple for Either {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 248 | / impl_for_tuple! { [INFO] [stdout] 249 | | (0, A), [INFO] [stdout] 250 | | (1, B), [INFO] [stdout] 251 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 253 | / impl_for_tuple! { [INFO] [stdout] 254 | | (0, A), [INFO] [stdout] 255 | | (1, B), [INFO] [stdout] 256 | | (2, C), [INFO] [stdout] 257 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 259 | / impl_for_tuple! { [INFO] [stdout] 260 | | (0, A), [INFO] [stdout] 261 | | (1, B), [INFO] [stdout] 262 | | (2, C), [INFO] [stdout] 263 | | (3, D), [INFO] [stdout] 264 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 266 | / impl_for_tuple! { [INFO] [stdout] 267 | | (0, A), [INFO] [stdout] 268 | | (1, B), [INFO] [stdout] 269 | | (2, C), [INFO] [stdout] 270 | | (3, D), [INFO] [stdout] 271 | | (4, E), [INFO] [stdout] 272 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 274 | / impl_for_tuple! { [INFO] [stdout] 275 | | (0, A), [INFO] [stdout] 276 | | (1, B), [INFO] [stdout] 277 | | (2, C), [INFO] [stdout] ... | [INFO] [stdout] 280 | | (5, F), [INFO] [stdout] 281 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 283 | / impl_for_tuple! { [INFO] [stdout] 284 | | (0, A), [INFO] [stdout] 285 | | (1, B), [INFO] [stdout] 286 | | (2, C), [INFO] [stdout] ... | [INFO] [stdout] 290 | | (6, G), [INFO] [stdout] 291 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 293 | / impl_for_tuple! { [INFO] [stdout] 294 | | (0, A), [INFO] [stdout] 295 | | (1, B), [INFO] [stdout] 296 | | (2, C), [INFO] [stdout] ... | [INFO] [stdout] 301 | | (7, H), [INFO] [stdout] 302 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 304 | / impl_for_tuple! { [INFO] [stdout] 305 | | (0, A), [INFO] [stdout] 306 | | (1, B), [INFO] [stdout] 307 | | (2, C), [INFO] [stdout] ... | [INFO] [stdout] 313 | | (8, I), [INFO] [stdout] 314 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 316 | / impl_for_tuple! { [INFO] [stdout] 317 | | (0, A), [INFO] [stdout] 318 | | (1, B), [INFO] [stdout] 319 | | (2, C), [INFO] [stdout] ... | [INFO] [stdout] 326 | | (9, J), [INFO] [stdout] 327 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 329 | / impl_for_tuple! { [INFO] [stdout] 330 | | (0, A), [INFO] [stdout] 331 | | (1, B), [INFO] [stdout] 332 | | (2, C), [INFO] [stdout] ... | [INFO] [stdout] 340 | | (10, K), [INFO] [stdout] 341 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: negative trait bounds are not fully implemented; use marker types for now [INFO] [stdout] --> src/into_cons.rs:218:36 [INFO] [stdout] | [INFO] [stdout] 218 | impl<$first_ty, $( $N ),*> !NotTuple for ( $first_ty, $( $N, )* ) {} [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 343 | / impl_for_tuple! { [INFO] [stdout] 344 | | (0, A), [INFO] [stdout] 345 | | (1, B), [INFO] [stdout] 346 | | (2, C), [INFO] [stdout] ... | [INFO] [stdout] 355 | | (11, L), [INFO] [stdout] 356 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: see issue #68318 for more information [INFO] [stdout] = help: add `#![feature(negative_impls)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-06-19; consider upgrading it if it is out of date [INFO] [stdout] = note: this error originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: use of an internal attribute [INFO] [stdout] --> src/tuple.rs:18:1 [INFO] [stdout] | [INFO] [stdout] 18 | / #[rustc_on_unimplemented = " [INFO] [stdout] 19 | | If you are writing generic code, add a bound like [INFO] [stdout] 20 | | [INFO] [stdout] 21 | | where {OrigType}: Flatten, [INFO] [stdout] ... | [INFO] [stdout] 32 | | This is required because current type system does not have negative reasoning."] [INFO] [stdout] | |________________________________________________________________________________^ [INFO] [stdout] | [INFO] [stdout] = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable [INFO] [stdout] = note: the `#[rustc_on_unimplemented]` attribute is an internal implementation detail that will never be stable [INFO] [stdout] = note: see `#[diagnostic::on_unimplemented]` for the stable equivalent of this attribute [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:1:64 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(optin_builtin_traits, on_unimplemented, never_type, specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around type [INFO] [stdout] --> src/into_cons.rs:234:21 [INFO] [stdout] | [INFO] [stdout] 234 | ( $( $N ),* ) [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 248 | / impl_for_tuple! { [INFO] [stdout] 249 | | (0, A), [INFO] [stdout] 250 | | (1, B), [INFO] [stdout] 251 | | } [INFO] [stdout] | |_- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` on by default [INFO] [stdout] = note: this warning originates in the macro `impl_for_tuple` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around block return value [INFO] [stdout] --> src/tuple.rs:185:9 [INFO] [stdout] | [INFO] [stdout] 185 | (self.head) [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 185 - (self.head) [INFO] [stdout] 185 + self.head [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0277]: the trait bound `cons::Cons: FixHead` is not satisfied [INFO] [stdout] --> src/into_cons.rs:148:32 [INFO] [stdout] | [INFO] [stdout] 148 | default type Specialized = DefaultIntoCons; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ the trait `FixHead` is not implemented for `cons::Cons` [INFO] [stdout] | [INFO] [stdout] note: required for `DefaultIntoCons` to implement `SpecializedIntoCons` [INFO] [stdout] --> src/into_cons.rs:172:9 [INFO] [stdout] | [INFO] [stdout] 172 | impl SpecializedIntoCons for DefaultIntoCons [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] 173 | where [INFO] [stdout] 174 | Cons: FixHead, [INFO] [stdout] | ------- unsatisfied trait bound introduced here [INFO] [stdout] note: required by a bound in `IntoConsSpecializer::Specialized` [INFO] [stdout] --> src/into_cons.rs:81:36 [INFO] [stdout] | [INFO] [stdout] 81 | type Specialized: From + SpecializedIntoCons; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ required by this bound in `IntoConsSpecializer::Specialized` [INFO] [stdout] help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement [INFO] [stdout] | [INFO] [stdout] 147 | impl IntoConsSpecializer for V where cons::Cons: FixHead { [INFO] [stdout] | +++++++++++++++++++++++++++++++++++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0366]: `!NotTuple` impls cannot be specialized [INFO] [stdout] --> src/into_cons.rs:155:1 [INFO] [stdout] | [INFO] [stdout] 155 | impl !NotTuple for Either {} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `!` is not a generic parameter [INFO] [stdout] note: use the same sequence of generic lifetime, type and const parameters as the enum definition [INFO] [stdout] --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/either-1.15.0/src/lib.rs:49:1 [INFO] [stdout] | [INFO] [stdout] 49 | pub enum Either { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0277, E0366, E0557, E0658. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0277`. [INFO] [stdout] [INFO] [stderr] error: could not compile `flatten` (lib) due to 23 previous errors; 3 warnings emitted [INFO] running `Command { std: "docker" "inspect" "7bfce996ce9c52d762a7440c3ea9c9ef91e5a9d59be309b6a6dd4eb856d30f6b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7bfce996ce9c52d762a7440c3ea9c9ef91e5a9d59be309b6a6dd4eb856d30f6b", kill_on_drop: false }` [INFO] [stdout] 7bfce996ce9c52d762a7440c3ea9c9ef91e5a9d59be309b6a6dd4eb856d30f6b