[INFO] fetching crate eso 0.0.2...
[INFO] checking eso-0.0.2 against master#507271bc119683008ec719ecee48814e8ac86c65 for pr-146440
[INFO] extracting crate eso 0.0.2 into /workspace/builds/worker-4-tc1/source
[INFO] removed /workspace/builds/worker-4-tc1/source/.cargo/config
[INFO] started tweaking crates.io crate eso 0.0.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate eso 0.0.2
[INFO] tweaked toml for crates.io crate eso 0.0.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate eso 0.0.2 on toolchain 507271bc119683008ec719ecee48814e8ac86c65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate eso 0.0.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "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-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d152acdb67425ffe8f447adb11ed51a64c19ccc508d19f97f6bd7cacbb97fd17
[INFO] running `Command { std: "docker" "start" "-a" "d152acdb67425ffe8f447adb11ed51a64c19ccc508d19f97f6bd7cacbb97fd17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d152acdb67425ffe8f447adb11ed51a64c19ccc508d19f97f6bd7cacbb97fd17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d152acdb67425ffe8f447adb11ed51a64c19ccc508d19f97f6bd7cacbb97fd17", kill_on_drop: false }`
[INFO] [stdout] d152acdb67425ffe8f447adb11ed51a64c19ccc508d19f97f6bd7cacbb97fd17
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+507271bc119683008ec719ecee48814e8ac86c65" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06a19186331f4f1056641bfa75ef380bb249124ca540922dcbaad4fe24f321fd
[INFO] running `Command { std: "docker" "start" "-a" "06a19186331f4f1056641bfa75ef380bb249124ca540922dcbaad4fe24f321fd", kill_on_drop: false }`
[INFO] [stderr]     Checking impls v1.0.3
[INFO] [stderr]     Checking eso v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable-doc-cfg`
[INFO] [stdout]   --> src/lib.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | #[cfg_attr(feature = "unstable-doc-cfg", feature(doc_cfg))]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `allow-unsafe` and `default`
[INFO] [stdout]    = help: consider adding `unstable-doc-cfg` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `unstable-doc-cfg`
[INFO] [stdout]   --> src/lib.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 68 | #[cfg_attr(feature = "unstable-doc-cfg", feature(doc_cfg))]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `allow-unsafe` and `default`
[INFO] [stdout]    = help: consider adding `unstable-doc-cfg` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/borrow.rs:116:28
[INFO] [stdout]     |
[INFO] [stdout] 116 |     fn borrow(&'a self) -> Cow<R> {
[INFO] [stdout]     |                --          ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is named 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)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 116 |     fn borrow(&'a self) -> Cow<'a, R> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/borrow.rs:116:28
[INFO] [stdout]     |
[INFO] [stdout] 116 |     fn borrow(&'a self) -> Cow<R> {
[INFO] [stdout]     |                --          ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                |
[INFO] [stdout]     |                the lifetime is named 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)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 116 |     fn borrow(&'a self) -> Cow<'a, R> {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "06a19186331f4f1056641bfa75ef380bb249124ca540922dcbaad4fe24f321fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06a19186331f4f1056641bfa75ef380bb249124ca540922dcbaad4fe24f321fd", kill_on_drop: false }`
[INFO] [stdout] 06a19186331f4f1056641bfa75ef380bb249124ca540922dcbaad4fe24f321fd
