[INFO] fetching crate perhaps 2.0.0...
[INFO] checking perhaps-2.0.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate perhaps 2.0.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate perhaps 2.0.0
[INFO] finished tweaking crates.io crate perhaps 2.0.0
[INFO] tweaked toml for crates.io crate perhaps 2.0.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate perhaps 2.0.0 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f62f06a153febde3b62092a9a10c3ec913effe320a834296b74dbbeb90482a72
[INFO] running `Command { std: "docker" "start" "-a" "f62f06a153febde3b62092a9a10c3ec913effe320a834296b74dbbeb90482a72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f62f06a153febde3b62092a9a10c3ec913effe320a834296b74dbbeb90482a72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f62f06a153febde3b62092a9a10c3ec913effe320a834296b74dbbeb90482a72", kill_on_drop: false }`
[INFO] [stdout] f62f06a153febde3b62092a9a10c3ec913effe320a834296b74dbbeb90482a72
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57c7a174da5a5fc224299132ee2222a8996dafd6c08b1620d014cebc07c86da9
[INFO] running `Command { std: "docker" "start" "-a" "57c7a174da5a5fc224299132ee2222a8996dafd6c08b1620d014cebc07c86da9", kill_on_drop: false }`
[INFO] [stderr]     Checking perhaps v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `panic_immediate_abort`
[INFO] [stdout]     --> src/lib.rs:1638:16
[INFO] [stdout]      |
[INFO] [stdout] 1638 | #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `panic_immediate_abort` 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: `panic_immediate_abort`
[INFO] [stdout]     --> src/lib.rs:1639:12
[INFO] [stdout]      |
[INFO] [stdout] 1639 | #[cfg_attr(feature = "panic_immediate_abort", inline)]
[INFO] [stdout]      |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `panic_immediate_abort` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `panic_immediate_abort`
[INFO] [stdout]     --> src/lib.rs:1647:16
[INFO] [stdout]      |
[INFO] [stdout] 1647 | #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `panic_immediate_abort` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `panic_immediate_abort`
[INFO] [stdout]     --> src/lib.rs:1648:12
[INFO] [stdout]      |
[INFO] [stdout] 1648 | #[cfg_attr(feature = "panic_immediate_abort", inline)]
[INFO] [stdout]      |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `panic_immediate_abort` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `panic_immediate_abort`
[INFO] [stdout]     --> src/lib.rs:1638:16
[INFO] [stdout]      |
[INFO] [stdout] 1638 | #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `panic_immediate_abort` 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: `panic_immediate_abort`
[INFO] [stdout]     --> src/lib.rs:1639:12
[INFO] [stdout]      |
[INFO] [stdout] 1639 | #[cfg_attr(feature = "panic_immediate_abort", inline)]
[INFO] [stdout]      |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `panic_immediate_abort` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `panic_immediate_abort`
[INFO] [stdout]     --> src/lib.rs:1647:16
[INFO] [stdout]      |
[INFO] [stdout] 1647 | #[cfg_attr(not(feature = "panic_immediate_abort"), inline(never))]
[INFO] [stdout]      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `panic_immediate_abort` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `panic_immediate_abort`
[INFO] [stdout]     --> src/lib.rs:1648:12
[INFO] [stdout]      |
[INFO] [stdout] 1648 | #[cfg_attr(feature = "panic_immediate_abort", inline)]
[INFO] [stdout]      |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]      |
[INFO] [stdout]      = note: no expected values for `feature`
[INFO] [stdout]      = help: consider adding `panic_immediate_abort` 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] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "57c7a174da5a5fc224299132ee2222a8996dafd6c08b1620d014cebc07c86da9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57c7a174da5a5fc224299132ee2222a8996dafd6c08b1620d014cebc07c86da9", kill_on_drop: false }`
[INFO] [stdout] 57c7a174da5a5fc224299132ee2222a8996dafd6c08b1620d014cebc07c86da9