[INFO] fetching crate mki 0.2.1...
[INFO] checking mki-0.2.1 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate mki 0.2.1 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate mki 0.2.1 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mki 0.2.1
[INFO] finished tweaking crates.io crate mki 0.2.1
[INFO] tweaked toml for crates.io crate mki 0.2.1 written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] crate crates.io crate mki 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d5c90d654e0f7ae8013f4bfc3eac04d3cff3d9c9b7d4da99db3b44382d351670
[INFO] running `Command { std: "docker" "start" "-a" "d5c90d654e0f7ae8013f4bfc3eac04d3cff3d9c9b7d4da99db3b44382d351670", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d5c90d654e0f7ae8013f4bfc3eac04d3cff3d9c9b7d4da99db3b44382d351670", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5c90d654e0f7ae8013f4bfc3eac04d3cff3d9c9b7d4da99db3b44382d351670", kill_on_drop: false }`
[INFO] [stdout] d5c90d654e0f7ae8013f4bfc3eac04d3cff3d9c9b7d4da99db3b44382d351670
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f121226eddc199438116a41495085e5a76191833b0ab56332c5ccdb7b354fa5
[INFO] running `Command { std: "docker" "start" "-a" "7f121226eddc199438116a41495085e5a76191833b0ab56332c5ccdb7b354fa5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling input-sys v1.16.0
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking ioctl-sys v0.5.2
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking enum_derive v0.1.7
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling x11 v2.19.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking uinput-sys v0.1.7
[INFO] [stderr]     Checking nix v0.22.2
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking udev v0.6.2
[INFO] [stderr]     Checking input v0.6.0
[INFO] [stderr]     Checking uinput v0.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking serde_yaml v0.8.21
[INFO] [stderr]     Checking mki v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::thread::Builder` that must be used
[INFO] [stdout]    --> src/details.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |             thread::Builder::new();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: must eventually spawn the thread
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::thread::Builder` that must be used
[INFO] [stdout]    --> src/details.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |             thread::Builder::new();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: must eventually spawn the thread
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.04s
[INFO] running `Command { std: "docker" "inspect" "7f121226eddc199438116a41495085e5a76191833b0ab56332c5ccdb7b354fa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f121226eddc199438116a41495085e5a76191833b0ab56332c5ccdb7b354fa5", kill_on_drop: false }`
[INFO] [stdout] 7f121226eddc199438116a41495085e5a76191833b0ab56332c5ccdb7b354fa5