[INFO] fetching crate futures_cbor_codec 0.3.1...
[INFO] checking futures_cbor_codec-0.3.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate futures_cbor_codec 0.3.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate futures_cbor_codec 0.3.1 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 futures_cbor_codec 0.3.1
[INFO] finished tweaking crates.io crate futures_cbor_codec 0.3.1
[INFO] tweaked toml for crates.io crate futures_cbor_codec 0.3.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate futures_cbor_codec 0.3.1 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 wasm-bindgen-test v0.3.24
[INFO] [stderr]   Downloaded ringbuf v0.2.5
[INFO] [stderr]   Downloaded futures_ringbuf v0.3.1
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.24
[INFO] [stderr]   Downloaded asynchronous-codec v0.6.0
[INFO] [stderr]   Downloaded log-derive v0.4.1
[INFO] [stderr]   Downloaded semver v1.0.3
[INFO] [stderr]   Downloaded console_error_panic_hook v0.1.6
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.24
[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] d17bd28cb584a702fa6d5e2d893ea40ccd86596e1bce4b9e52590df83c86d4ec
[INFO] running `Command { std: "docker" "start" "-a" "d17bd28cb584a702fa6d5e2d893ea40ccd86596e1bce4b9e52590df83c86d4ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d17bd28cb584a702fa6d5e2d893ea40ccd86596e1bce4b9e52590df83c86d4ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d17bd28cb584a702fa6d5e2d893ea40ccd86596e1bce4b9e52590df83c86d4ec", kill_on_drop: false }`
[INFO] [stdout] d17bd28cb584a702fa6d5e2d893ea40ccd86596e1bce4b9e52590df83c86d4ec
[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] c4694ff1ab3f6c7640dc5844faab43cc7b0899bb7cb168e0c4c8d7d7237d9de6
[INFO] running `Command { std: "docker" "start" "-a" "c4694ff1ab3f6c7640dc5844faab43cc7b0899bb7cb168e0c4c8d7d7237d9de6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]    Compiling semver v1.0.3
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking futures-sink v0.3.15
[INFO] [stderr]     Checking futures-io v0.3.15
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking ringbuf v0.2.5
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling futures_ringbuf v0.3.1
[INFO] [stderr]    Compiling futures_cbor_codec v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling log-derive v0.4.1
[INFO] [stderr]     Checking futures-executor v0.3.15
[INFO] [stderr]     Checking asynchronous-codec v0.6.0
[INFO] [stderr]     Checking futures v0.3.15
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.84s
[INFO] running `Command { std: "docker" "inspect" "c4694ff1ab3f6c7640dc5844faab43cc7b0899bb7cb168e0c4c8d7d7237d9de6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4694ff1ab3f6c7640dc5844faab43cc7b0899bb7cb168e0c4c8d7d7237d9de6", kill_on_drop: false }`
[INFO] [stdout] c4694ff1ab3f6c7640dc5844faab43cc7b0899bb7cb168e0c4c8d7d7237d9de6