[INFO] fetching crate cow_vec_item 0.5.1...
[INFO] checking cow_vec_item-0.5.1 against try#a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399 for pr-145770
[INFO] extracting crate cow_vec_item 0.5.1 into /workspace/builds/worker-7-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-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cow_vec_item 0.5.1 on toolchain a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 711694b8f892228bd6d4fcb208f3f3e1d1676f662a3b862ce44b17fec4627150
[INFO] running `Command { std: "docker" "start" "-a" "711694b8f892228bd6d4fcb208f3f3e1d1676f662a3b862ce44b17fec4627150", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "711694b8f892228bd6d4fcb208f3f3e1d1676f662a3b862ce44b17fec4627150", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "711694b8f892228bd6d4fcb208f3f3e1d1676f662a3b862ce44b17fec4627150", kill_on_drop: false }`
[INFO] [stdout] 711694b8f892228bd6d4fcb208f3f3e1d1676f662a3b862ce44b17fec4627150
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ec75e46387cc21d719e52aca5f92e36cda0dcbc9b1f12d308f306569a26205a
[INFO] running `Command { std: "docker" "start" "-a" "7ec75e46387cc21d719e52aca5f92e36cda0dcbc9b1f12d308f306569a26205a", 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: 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<Item = &mut T>
[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: `#[deny(mismatched_lifetime_syntaxes)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: consistently use `'cowvec`
[INFO] [stdout]     |
[INFO] [stdout] 473 |     pub fn eager_cloned_iter_mut<'cowvec>(&'cowvec mut self) -> impl Iterator<Item = &'cowvec mut T>
[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: 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<Item = &mut T>
[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: `#[deny(mismatched_lifetime_syntaxes)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: consistently use `'cowvec`
[INFO] [stdout]     |
[INFO] [stdout] 473 |     pub fn eager_cloned_iter_mut<'cowvec>(&'cowvec mut self) -> impl Iterator<Item = &'cowvec mut T>
[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" "7ec75e46387cc21d719e52aca5f92e36cda0dcbc9b1f12d308f306569a26205a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ec75e46387cc21d719e52aca5f92e36cda0dcbc9b1f12d308f306569a26205a", kill_on_drop: false }`
[INFO] [stdout] 7ec75e46387cc21d719e52aca5f92e36cda0dcbc9b1f12d308f306569a26205a
