[INFO] fetching crate maths-traits 0.2.1... [INFO] testing maths-traits-0.2.1 against 1.91.0 for beta-1.92-2 [INFO] extracting crate maths-traits 0.2.1 into /workspace/builds/worker-3-tc1/source [INFO] started tweaking crates.io crate maths-traits 0.2.1 [INFO] finished tweaking crates.io crate maths-traits 0.2.1 [INFO] tweaked toml for crates.io crate maths-traits 0.2.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate maths-traits 0.2.1 on toolchain 1.91.0 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 2 packages to latest compatible versions [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 427a48487a069e488d8d97c6145cee90fa23ba8ce9d5e18fe273cd5d35b395e4 [INFO] running `Command { std: "docker" "start" "-a" "427a48487a069e488d8d97c6145cee90fa23ba8ce9d5e18fe273cd5d35b395e4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "427a48487a069e488d8d97c6145cee90fa23ba8ce9d5e18fe273cd5d35b395e4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "427a48487a069e488d8d97c6145cee90fa23ba8ce9d5e18fe273cd5d35b395e4", kill_on_drop: false }` [INFO] [stdout] 427a48487a069e488d8d97c6145cee90fa23ba8ce9d5e18fe273cd5d35b395e4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7b87d814c6b5bd744f79bd456d81f782bfbab63302f6634087a4cef847df124a [INFO] running `Command { std: "docker" "start" "-a" "7b87d814c6b5bd744f79bd456d81f782bfbab63302f6634087a4cef847df124a", kill_on_drop: false }` [INFO] [stderr] Compiling num-traits v0.2.19 [INFO] [stderr] Compiling maths-traits v0.2.1 (/opt/rustwide/workdir) [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/lib.rs:317:1 [INFO] [stdout] | [INFO] [stdout] 317 | #![feature(trait_alias)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/lib.rs:318:1 [INFO] [stdout] | [INFO] [stdout] 318 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/lib.rs:319:1 [INFO] [stdout] | [INFO] [stdout] 319 | #![feature(extra_log_consts)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [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:318:12 [INFO] [stdout] | [INFO] [stdout] 318 | #![feature(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: unexpected `cfg` condition name: `std` [INFO] [stdout] --> src/algebra/group_like.rs:567:7 [INFO] [stdout] | [INFO] [stdout] 567 | #[cfg(std)] impl<'a> AddAssociative for ::std::borrow::Cow<'a,str> {} [INFO] [stdout] | ^^^ help: found config with similar value: `feature = "std"` [INFO] [stdout] | [INFO] [stdout] = help: expected names are: `docsrs`, `feature`, and `test` and 31 more [INFO] [stdout] = help: consider using a Cargo feature instead [INFO] [stdout] = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint: [INFO] [stdout] [lints.rust] [INFO] [stdout] unexpected_cfgs = { level = "warn", check-cfg = ['cfg(std)'] } [INFO] [stdout] = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(std)");` to the top of the `build.rs` [INFO] [stdout] = note: see for more information about checking conditional configuration [INFO] [stdout] = note: `#[warn(unexpected_cfgs)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `extra_log_consts` has been stable since 1.43.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/lib.rs:319:12 [INFO] [stdout] | [INFO] [stdout] 319 | #![feature(extra_log_consts)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(stable_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `#[inline]` attribute cannot be used on required trait methods [INFO] [stdout] --> src/analysis/metric.rs:44:5 [INFO] [stdout] | [INFO] [stdout] 44 | #[inline] fn norm(&self, x:X) -> R; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[inline]` can be applied to functions, inherent methods, provided trait methods, trait methods in impl blocks, and closures [INFO] [stdout] = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0554`. [INFO] [stdout] [INFO] [stderr] error: could not compile `maths-traits` (lib) due to 3 previous errors; 4 warnings emitted [INFO] running `Command { std: "docker" "inspect" "7b87d814c6b5bd744f79bd456d81f782bfbab63302f6634087a4cef847df124a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7b87d814c6b5bd744f79bd456d81f782bfbab63302f6634087a4cef847df124a", kill_on_drop: false }` [INFO] [stdout] 7b87d814c6b5bd744f79bd456d81f782bfbab63302f6634087a4cef847df124a