[INFO] fetching crate cow_vec_item 0.5.1... [INFO] testing cow_vec_item-0.5.1 against 1.90.0 for beta-1.91-3 [INFO] extracting crate cow_vec_item 0.5.1 into /workspace/builds/worker-5-tc1/source [INFO] started tweaking crates.io crate cow_vec_item 0.5.1 [INFO] finished tweaking crates.io crate cow_vec_item 0.5.1 [INFO] tweaked toml for crates.io crate cow_vec_item 0.5.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate cow_vec_item 0.5.1 on toolchain 1.90.0 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f361ac6d23ef231c7aacde37f8a4bba1d2ee071cf8a032ecc2120ff969ecf427 [INFO] running `Command { std: "docker" "start" "-a" "f361ac6d23ef231c7aacde37f8a4bba1d2ee071cf8a032ecc2120ff969ecf427", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f361ac6d23ef231c7aacde37f8a4bba1d2ee071cf8a032ecc2120ff969ecf427", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f361ac6d23ef231c7aacde37f8a4bba1d2ee071cf8a032ecc2120ff969ecf427", kill_on_drop: false }` [INFO] [stdout] f361ac6d23ef231c7aacde37f8a4bba1d2ee071cf8a032ecc2120ff969ecf427 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] cc02b91dda02aa532acd32ae613fdf5de89072c1358436868f8118172d9ec746 [INFO] running `Command { std: "docker" "start" "-a" "cc02b91dda02aa532acd32ae613fdf5de89072c1358436868f8118172d9ec746", kill_on_drop: false }` [INFO] [stderr] Compiling cow_vec_item v0.5.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:511:13 [INFO] [stdout] | [INFO] [stdout] 511 | let mut theref = unsafe { &mut *self.cowvec }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> src/lib.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | #![deny(warnings)] [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] = note: `#[warn(unused_mut)]` implied by `#[warn(warnings)]` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/lib.rs:473:44 [INFO] [stdout] | [INFO] [stdout] 473 | pub fn eager_cloned_iter_mut<'cowvec>(&'cowvec mut self) -> impl Iterator [INFO] [stdout] | ^^^^^^^ the lifetime is named here ------ the same lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` implied by `#[warn(warnings)]` [INFO] [stdout] help: consistently use `'cowvec` [INFO] [stdout] | [INFO] [stdout] 473 | pub fn eager_cloned_iter_mut<'cowvec>(&'cowvec mut self) -> impl Iterator [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.29s [INFO] running `Command { std: "docker" "inspect" "cc02b91dda02aa532acd32ae613fdf5de89072c1358436868f8118172d9ec746", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cc02b91dda02aa532acd32ae613fdf5de89072c1358436868f8118172d9ec746", kill_on_drop: false }` [INFO] [stdout] cc02b91dda02aa532acd32ae613fdf5de89072c1358436868f8118172d9ec746 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] a41173858784015259b3a9dcd15bf8ad702abd7eeb7588f3fffb6e53a3a93889 [INFO] running `Command { std: "docker" "start" "-a" "a41173858784015259b3a9dcd15bf8ad702abd7eeb7588f3fffb6e53a3a93889", kill_on_drop: false }` [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:511:13 [INFO] [stdout] | [INFO] [stdout] 511 | let mut theref = unsafe { &mut *self.cowvec }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> src/lib.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | #![deny(warnings)] [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] = note: `#[warn(unused_mut)]` implied by `#[warn(warnings)]` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: eliding a lifetime that's named elsewhere is confusing [INFO] [stdout] --> src/lib.rs:473:44 [INFO] [stdout] | [INFO] [stdout] 473 | pub fn eager_cloned_iter_mut<'cowvec>(&'cowvec mut self) -> impl Iterator [INFO] [stdout] | ^^^^^^^ the lifetime is named here ------ the same lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` implied by `#[warn(warnings)]` [INFO] [stdout] help: consistently use `'cowvec` [INFO] [stdout] | [INFO] [stdout] 473 | pub fn eager_cloned_iter_mut<'cowvec>(&'cowvec mut self) -> impl Iterator [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling cow_vec_item v0.5.1 (/opt/rustwide/workdir) [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/lib.rs:3:19 [INFO] [stdout] | [INFO] [stdout] 3 | #![cfg_attr(test, feature(test))] [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:511:13 [INFO] [stdout] | [INFO] [stdout] 511 | let mut theref = unsafe { &mut *self.cowvec }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> src/lib.rs:2:9 [INFO] [stdout] | [INFO] [stdout] 2 | #![deny(warnings)] [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] = note: `#[warn(unused_mut)]` implied by `#[warn(warnings)]` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0554`. [INFO] [stdout] [INFO] [stderr] error: could not compile `cow_vec_item` (lib test) due to 1 previous error; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "a41173858784015259b3a9dcd15bf8ad702abd7eeb7588f3fffb6e53a3a93889", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a41173858784015259b3a9dcd15bf8ad702abd7eeb7588f3fffb6e53a3a93889", kill_on_drop: false }` [INFO] [stdout] a41173858784015259b3a9dcd15bf8ad702abd7eeb7588f3fffb6e53a3a93889