[INFO] fetching crate kingslayer 0.5.5...
[INFO] checking kingslayer-0.5.5 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate kingslayer 0.5.5 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate kingslayer 0.5.5 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 kingslayer 0.5.5
[INFO] finished tweaking crates.io crate kingslayer 0.5.5
[INFO] tweaked toml for crates.io crate kingslayer 0.5.5 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate kingslayer 0.5.5 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.16
[INFO] [stderr]   Downloaded syn v1.0.89
[INFO] [stderr]   Downloaded libc v0.2.120
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 840c31250a2a2f5b72a2999c40d05dd48502da5ce32f9a998ed3908606f4539a
[INFO] running `Command { std: "docker" "start" "-a" "840c31250a2a2f5b72a2999c40d05dd48502da5ce32f9a998ed3908606f4539a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "840c31250a2a2f5b72a2999c40d05dd48502da5ce32f9a998ed3908606f4539a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "840c31250a2a2f5b72a2999c40d05dd48502da5ce32f9a998ed3908606f4539a", kill_on_drop: false }`
[INFO] [stdout] 840c31250a2a2f5b72a2999c40d05dd48502da5ce32f9a998ed3908606f4539a
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c3c6987ccb853784eb50e243bbbbfee4624ccdf37596a7822ab5942b58a22f8
[INFO] running `Command { std: "docker" "start" "-a" "7c3c6987ccb853784eb50e243bbbbfee4624ccdf37596a7822ab5942b58a22f8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.120
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]     Checking serde v1.0.136
[INFO] [stderr]     Checking ron v0.6.6
[INFO] [stderr]     Checking kingslayer v0.5.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Breakable`
[INFO] [stdout]   --> src/entity/mod.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use breakable::{Breakable, Durability};
[INFO] [stdout]    |                     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Breakable`
[INFO] [stdout]   --> src/entity/mod.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use breakable::{Breakable, Durability};
[INFO] [stdout]    |                     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Breakable` is never used
[INFO] [stdout]   --> src/entity/breakable.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub trait Breakable {}
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `lock` is never used
[INFO] [stdout]   --> src/entity/lockable.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait Lockable {
[INFO] [stdout]    |           -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn lock(&mut self) -> CmdResult;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Breakable` is never used
[INFO] [stdout]   --> src/entity/breakable.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub trait Breakable {}
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `lock` is never used
[INFO] [stdout]   --> src/entity/lockable.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait Lockable {
[INFO] [stdout]    |           -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn lock(&mut self) -> CmdResult;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.00s
[INFO] running `Command { std: "docker" "inspect" "7c3c6987ccb853784eb50e243bbbbfee4624ccdf37596a7822ab5942b58a22f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c3c6987ccb853784eb50e243bbbbfee4624ccdf37596a7822ab5942b58a22f8", kill_on_drop: false }`
[INFO] [stdout] 7c3c6987ccb853784eb50e243bbbbfee4624ccdf37596a7822ab5942b58a22f8
[INFO] checking kingslayer-0.5.5 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate kingslayer 0.5.5 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate kingslayer 0.5.5 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate kingslayer 0.5.5
[INFO] finished tweaking crates.io crate kingslayer 0.5.5
[INFO] tweaked toml for crates.io crate kingslayer 0.5.5 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate kingslayer 0.5.5 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 099437206d3db9182f70e620c499ce27f7450f8c7bdb7c43da8b4de0207143fa
[INFO] running `Command { std: "docker" "start" "-a" "099437206d3db9182f70e620c499ce27f7450f8c7bdb7c43da8b4de0207143fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "099437206d3db9182f70e620c499ce27f7450f8c7bdb7c43da8b4de0207143fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "099437206d3db9182f70e620c499ce27f7450f8c7bdb7c43da8b4de0207143fa", kill_on_drop: false }`
[INFO] [stdout] 099437206d3db9182f70e620c499ce27f7450f8c7bdb7c43da8b4de0207143fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a976da4bb57531984f484ca2e06a52ce0aa22adb109a00557a38e6b805bb1dd5
[INFO] running `Command { std: "docker" "start" "-a" "a976da4bb57531984f484ca2e06a52ce0aa22adb109a00557a38e6b805bb1dd5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.120
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]     Checking serde v1.0.136
[INFO] [stderr]     Checking ron v0.6.6
[INFO] [stderr]     Checking kingslayer v0.5.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Breakable`
[INFO] [stdout]   --> src/entity/mod.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use breakable::{Breakable, Durability};
[INFO] [stdout]    |                     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Breakable`
[INFO] [stdout]   --> src/entity/mod.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub use breakable::{Breakable, Durability};
[INFO] [stdout]    |                     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Breakable` is never used
[INFO] [stdout]   --> src/entity/breakable.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub trait Breakable {}
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `lock` is never used
[INFO] [stdout]   --> src/entity/lockable.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait Lockable {
[INFO] [stdout]    |           -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn lock(&mut self) -> CmdResult;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Breakable` is never used
[INFO] [stdout]   --> src/entity/breakable.rs:17:11
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub trait Breakable {}
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `lock` is never used
[INFO] [stdout]   --> src/entity/lockable.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub trait Lockable {
[INFO] [stdout]    |           -------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn lock(&mut self) -> CmdResult;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.24s
[INFO] running `Command { std: "docker" "inspect" "a976da4bb57531984f484ca2e06a52ce0aa22adb109a00557a38e6b805bb1dd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a976da4bb57531984f484ca2e06a52ce0aa22adb109a00557a38e6b805bb1dd5", kill_on_drop: false }`
[INFO] [stdout] a976da4bb57531984f484ca2e06a52ce0aa22adb109a00557a38e6b805bb1dd5