[INFO] fetching crate creak 0.3.0...
[INFO] checking creak-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate creak 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate creak 0.3.0 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 creak 0.3.0
[INFO] finished tweaking crates.io crate creak 0.3.0
[INFO] tweaked toml for crates.io crate creak 0.3.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate creak 0.3.0 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 slice-deque v0.3.0
[INFO] [stderr]   Downloaded cc v1.0.66
[INFO] [stderr]   Downloaded minimp3 v0.5.0
[INFO] [stderr]   Downloaded ogg v0.7.1
[INFO] [stderr]   Downloaded hound v3.4.0
[INFO] [stderr]   Downloaded lewton v0.10.1
[INFO] [stderr]   Downloaded minimp3-sys v0.3.2
[INFO] [stderr]   Downloaded claxon v0.4.3
[INFO] [stderr]   Downloaded libc v0.2.80
[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] 6152dc802838f1fcc21b394775a4a65be6393f86b12b65dd49c463c39833e5e7
[INFO] running `Command { std: "docker" "start" "-a" "6152dc802838f1fcc21b394775a4a65be6393f86b12b65dd49c463c39833e5e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6152dc802838f1fcc21b394775a4a65be6393f86b12b65dd49c463c39833e5e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6152dc802838f1fcc21b394775a4a65be6393f86b12b65dd49c463c39833e5e7", kill_on_drop: false }`
[INFO] [stdout] 6152dc802838f1fcc21b394775a4a65be6393f86b12b65dd49c463c39833e5e7
[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] bc264fc5cea4e6ab3bd1f2126bc0c2d9bc88c2faa5361fc44b401c79a8a268fd
[INFO] running `Command { std: "docker" "start" "-a" "bc264fc5cea4e6ab3bd1f2126bc0c2d9bc88c2faa5361fc44b401c79a8a268fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]     Checking tinyvec v0.3.4
[INFO] [stderr]     Checking hound v3.4.0
[INFO] [stderr]     Checking claxon v0.4.3
[INFO] [stderr]     Checking ogg v0.7.1
[INFO] [stderr]     Checking slice-deque v0.3.0
[INFO] [stderr]    Compiling minimp3-sys v0.3.2
[INFO] [stderr]     Checking lewton v0.10.1
[INFO] [stderr]     Checking minimp3 v0.5.0
[INFO] [stderr]     Checking creak v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `creak` is imported redundantly
[INFO] [stdout]  --> src/tools/creak-raw.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use creak;
[INFO] [stdout]   |     ^^^^^ the item `creak` is already defined by prelude
[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] [stdout] warning: the item `creak` is imported redundantly
[INFO] [stdout]  --> src/tools/creak-raw.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use creak;
[INFO] [stdout]   |     ^^^^^ the item `creak` is already defined by prelude
[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]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.90s
[INFO] running `Command { std: "docker" "inspect" "bc264fc5cea4e6ab3bd1f2126bc0c2d9bc88c2faa5361fc44b401c79a8a268fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc264fc5cea4e6ab3bd1f2126bc0c2d9bc88c2faa5361fc44b401c79a8a268fd", kill_on_drop: false }`
[INFO] [stdout] bc264fc5cea4e6ab3bd1f2126bc0c2d9bc88c2faa5361fc44b401c79a8a268fd