[INFO] fetching crate tokenlock 0.3.8...
[INFO] checking tokenlock-0.3.8 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate tokenlock 0.3.8 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate tokenlock 0.3.8 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] removed /workspace/builds/worker-1-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate tokenlock 0.3.8
[INFO] finished tweaking crates.io crate tokenlock 0.3.8
[INFO] tweaked toml for crates.io crate tokenlock 0.3.8 written to /workspace/builds/worker-1-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]     Updating crates.io index
[INFO] [stderr]      Locking 62 packages
[INFO] [stderr]       Adding async-scoped v0.7.1 (latest: v0.9.0)
[INFO] [stderr]       Adding env_logger v0.9.3 (latest: v0.11.3)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded const-default v1.0.0
[INFO] [stderr]   Downloaded async-scoped v0.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 798b4b2b1ade4c1a792ccd91a4bb2714decfea27047b47ef05d4087433205693
[INFO] running `Command { std: "docker" "start" "-a" "798b4b2b1ade4c1a792ccd91a4bb2714decfea27047b47ef05d4087433205693", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "798b4b2b1ade4c1a792ccd91a4bb2714decfea27047b47ef05d4087433205693", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "798b4b2b1ade4c1a792ccd91a4bb2714decfea27047b47ef05d4087433205693", kill_on_drop: false }`
[INFO] [stdout] 798b4b2b1ade4c1a792ccd91a4bb2714decfea27047b47ef05d4087433205693
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 1e52c37d2bcb8d8eb1a641a60e59e73a5b1cb3b4207ff122b324f367e2394c98
[INFO] running `Command { std: "docker" "start" "-a" "1e52c37d2bcb8d8eb1a641a60e59e73a5b1cb3b4207ff122b324f367e2394c98", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]    Compiling tokenlock v0.3.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking rayon v1.10.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/singleton.rs:133:31
[INFO] [stdout]     |
[INFO] [stdout] 133 | struct Invariant<Tag: ?Sized>(fn(&Tag) -> &Tag);
[INFO] [stdout]     |        ---------              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 133 | struct Invariant<Tag: ?Sized>(());
[INFO] [stdout]     |                               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex-automata v0.4.6
[INFO] [stderr]     Checking pin-project v1.1.5
[INFO] [stderr]     Checking regex v1.10.4
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking async-scoped v0.7.1
[INFO] [stderr]     Checking env_logger v0.9.3
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/singleton.rs:133:31
[INFO] [stdout]     |
[INFO] [stdout] 133 | struct Invariant<Tag: ?Sized>(fn(&Tag) -> &Tag);
[INFO] [stdout]     |        ---------              ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 133 | struct Invariant<Tag: ?Sized>(());
[INFO] [stdout]     |                               ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.15s
[INFO] running `Command { std: "docker" "inspect" "1e52c37d2bcb8d8eb1a641a60e59e73a5b1cb3b4207ff122b324f367e2394c98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e52c37d2bcb8d8eb1a641a60e59e73a5b1cb3b4207ff122b324f367e2394c98", kill_on_drop: false }`
[INFO] [stdout] 1e52c37d2bcb8d8eb1a641a60e59e73a5b1cb3b4207ff122b324f367e2394c98