[INFO] cloning repository https://github.com/vhuynhle/atomics-locks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vhuynhle/atomics-locks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvhuynhle%2Fatomics-locks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvhuynhle%2Fatomics-locks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5a7a05bd0b1099112712e4e056856c3354f90fbc
[INFO] checking vhuynhle/atomics-locks against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvhuynhle%2Fatomics-locks" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/vhuynhle/atomics-locks 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 git repo https://github.com/vhuynhle/atomics-locks
[INFO] finished tweaking git repo https://github.com/vhuynhle/atomics-locks
[INFO] tweaked toml for git repo https://github.com/vhuynhle/atomics-locks written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/vhuynhle/atomics-locks 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded atomic-wait v1.1.0
[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] 0ab31dec94af06319c9a9447d269664c07461c3da585aefb090a97b64cc7f869
[INFO] running `Command { std: "docker" "start" "-a" "0ab31dec94af06319c9a9447d269664c07461c3da585aefb090a97b64cc7f869", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ab31dec94af06319c9a9447d269664c07461c3da585aefb090a97b64cc7f869", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ab31dec94af06319c9a9447d269664c07461c3da585aefb090a97b64cc7f869", kill_on_drop: false }`
[INFO] [stdout] 0ab31dec94af06319c9a9447d269664c07461c3da585aefb090a97b64cc7f869
[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] df04f3d6ad66eb6ff9d35d9b08e4fc1415b2c9b18d99a35a506aeab1501d1a2a
[INFO] running `Command { std: "docker" "start" "-a" "df04f3d6ad66eb6ff9d35d9b08e4fc1415b2c9b18d99a35a506aeab1501d1a2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]     Checking ch05 v0.1.0 (/opt/rustwide/workdir/ch05)
[INFO] [stderr]     Checking ch03 v0.1.0 (/opt/rustwide/workdir/ch03)
[INFO] [stderr]     Checking ch07 v0.1.0 (/opt/rustwide/workdir/ch07)
[INFO] [stderr]     Checking ch01 v0.1.0 (/opt/rustwide/workdir/ch01)
[INFO] [stdout] warning: the item `thread` is imported redundantly
[INFO] [stdout]   --> ch05/src/blocking_channel.rs:97:15
[INFO] [stdout]    |
[INFO] [stdout] 96 |     use super::*;
[INFO] [stdout]    |         -------- the item `thread` is already imported here
[INFO] [stdout] 97 |     use std::{thread, time::Duration};
[INFO] [stdout]    |               ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch06 v0.1.0 (/opt/rustwide/workdir/ch06)
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking atomic-wait v1.1.0
[INFO] [stderr]     Checking ch08 v0.1.0 (/opt/rustwide/workdir/ch08)
[INFO] [stderr]     Checking ch09 v0.1.0 (/opt/rustwide/workdir/ch09)
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking ch02 v0.1.0 (/opt/rustwide/workdir/ch02)
[INFO] [stderr]     Checking ch04 v0.1.0 (/opt/rustwide/workdir/ch04)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.02s
[INFO] running `Command { std: "docker" "inspect" "df04f3d6ad66eb6ff9d35d9b08e4fc1415b2c9b18d99a35a506aeab1501d1a2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df04f3d6ad66eb6ff9d35d9b08e4fc1415b2c9b18d99a35a506aeab1501d1a2a", kill_on_drop: false }`
[INFO] [stdout] df04f3d6ad66eb6ff9d35d9b08e4fc1415b2c9b18d99a35a506aeab1501d1a2a