[INFO] fetching crate cow_vec_item 0.5.1... [INFO] checking cow_vec_item-0.5.1 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170 [INFO] extracting crate cow_vec_item 0.5.1 into /workspace/builds/worker-3-tc2/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-3-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate cow_vec_item 0.5.1 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c68a8433399c8e2f6b79ebd0ce7fb59811c3641d4d0a486ba3289c6910588180 [INFO] running `Command { std: "docker" "start" "-a" "c68a8433399c8e2f6b79ebd0ce7fb59811c3641d4d0a486ba3289c6910588180", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c68a8433399c8e2f6b79ebd0ce7fb59811c3641d4d0a486ba3289c6910588180", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c68a8433399c8e2f6b79ebd0ce7fb59811c3641d4d0a486ba3289c6910588180", kill_on_drop: false }` [INFO] [stdout] c68a8433399c8e2f6b79ebd0ce7fb59811c3641d4d0a486ba3289c6910588180 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 62340ffe41894a19e23cb7a207958339fec3ee5391c747659a1d9081eb2e4375 [INFO] running `Command { std: "docker" "start" "-a" "62340ffe41894a19e23cb7a207958339fec3ee5391c747659a1d9081eb2e4375", kill_on_drop: false }` [INFO] [stderr] Checking cow_vec_item v0.5.1 (/opt/rustwide/workdir) [INFO] [stdout] error: 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: `#[deny(unused_mut)]` implied by `#[deny(warnings)]` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: lifetime flowing from input to output with different syntax can be 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] | ^^^^^^^ this lifetime flows to the output ------ the lifetime gets resolved as `'cowvec` [INFO] [stdout] | [INFO] [stdout] = note: `#[deny(mismatched_lifetime_syntaxes)]` implied by `#[deny(warnings)]` [INFO] [stdout] help: one option is to 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] error: could not compile `cow_vec_item` (lib) due to 2 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] error: 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: `#[deny(unused_mut)]` implied by `#[deny(warnings)]` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: lifetime flowing from input to output with different syntax can be 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] | ^^^^^^^ this lifetime flows to the output ------ the lifetime gets resolved as `'cowvec` [INFO] [stdout] | [INFO] [stdout] = note: `#[deny(mismatched_lifetime_syntaxes)]` implied by `#[deny(warnings)]` [INFO] [stdout] help: one option is to 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] error: could not compile `cow_vec_item` (lib test) due to 2 previous errors [INFO] running `Command { std: "docker" "inspect" "62340ffe41894a19e23cb7a207958339fec3ee5391c747659a1d9081eb2e4375", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "62340ffe41894a19e23cb7a207958339fec3ee5391c747659a1d9081eb2e4375", kill_on_drop: false }` [INFO] [stdout] 62340ffe41894a19e23cb7a207958339fec3ee5391c747659a1d9081eb2e4375