[INFO] fetching crate hashcow 0.2.0...
[INFO] checking hashcow-0.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate hashcow 0.2.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate hashcow 0.2.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hashcow 0.2.0
[INFO] finished tweaking crates.io crate hashcow 0.2.0
[INFO] tweaked toml for crates.io crate hashcow 0.2.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 10 packages
[INFO] [stderr]       Adding hashbrown v0.1.8 (latest: v0.14.3)
[INFO] [stderr]       Adding scopeguard v0.3.3 (latest: v1.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f382ff3e77ec6c6ec65493893579183091e40238a63ee723f7703ea7b9fedc21
[INFO] running `Command { std: "docker" "start" "-a" "f382ff3e77ec6c6ec65493893579183091e40238a63ee723f7703ea7b9fedc21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f382ff3e77ec6c6ec65493893579183091e40238a63ee723f7703ea7b9fedc21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f382ff3e77ec6c6ec65493893579183091e40238a63ee723f7703ea7b9fedc21", kill_on_drop: false }`
[INFO] [stdout] f382ff3e77ec6c6ec65493893579183091e40238a63ee723f7703ea7b9fedc21
[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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bee0f0875d0b9f90f84f9d30733542e889baaefe55522c7319b3c55b741ffcee
[INFO] running `Command { std: "docker" "start" "-a" "bee0f0875d0b9f90f84f9d30733542e889baaefe55522c7319b3c55b741ffcee", kill_on_drop: false }`
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking hashbrown v0.1.8
[INFO] [stderr]     Checking hashcow v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ToOwned` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:46:32
[INFO] [stdout]    |
[INFO] [stdout] 46 | use std::borrow::{Borrow, Cow, ToOwned};
[INFO] [stdout]    |                                ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToOwned` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/lib.rs:449:9
[INFO] [stdout]     |
[INFO] [stdout] 449 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToOwned` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:46:32
[INFO] [stdout]    |
[INFO] [stdout] 46 | use std::borrow::{Borrow, Cow, ToOwned};
[INFO] [stdout]    |                                ^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `ToOwned` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/lib.rs:310:5
[INFO] [stdout]     |
[INFO] [stdout] 310 |     #[inline]
[INFO] [stdout]     |     ^^^^^^^^^ help: remove this attribute
[INFO] [stdout]     |
[INFO] [stdout] note: attribute also specified here
[INFO] [stdout]    --> src/lib.rs:293:5
[INFO] [stdout]     |
[INFO] [stdout] 293 |     #[inline]
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused attribute
[INFO] [stdout]    --> src/lib.rs:310:5
[INFO] [stdout]     |
[INFO] [stdout] 310 |     #[inline]
[INFO] [stdout]     |     ^^^^^^^^^ help: remove this attribute
[INFO] [stdout]     |
[INFO] [stdout] note: attribute also specified here
[INFO] [stdout]    --> src/lib.rs:293:5
[INFO] [stdout]     |
[INFO] [stdout] 293 |     #[inline]
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "bee0f0875d0b9f90f84f9d30733542e889baaefe55522c7319b3c55b741ffcee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bee0f0875d0b9f90f84f9d30733542e889baaefe55522c7319b3c55b741ffcee", kill_on_drop: false }`
[INFO] [stdout] bee0f0875d0b9f90f84f9d30733542e889baaefe55522c7319b3c55b741ffcee