[INFO] fetching crate multihash 0.19.1...
[INFO] checking multihash-0.19.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate multihash 0.19.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate multihash 0.19.1 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 multihash 0.19.1
[INFO] finished tweaking crates.io crate multihash 0.19.1
[INFO] tweaked toml for crates.io crate multihash 0.19.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate multihash 0.19.1 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]  Downloading crates ...
[INFO] [stderr]   Downloaded parity-scale-codec-derive v3.1.4
[INFO] [stderr]   Downloaded parity-scale-codec v3.5.0
[INFO] [stderr]   Downloaded log v0.4.18
[INFO] [stderr]   Downloaded serde_test v1.0.163
[INFO] [stderr]   Downloaded toml_datetime v0.6.2
[INFO] [stderr]   Downloaded proc-macro2 v1.0.59
[INFO] [stderr]   Downloaded arbitrary v1.3.0
[INFO] [stderr]   Downloaded serde v1.0.163
[INFO] [stderr]   Downloaded winnow v0.4.6
[INFO] [stderr]   Downloaded toml_edit v0.19.10
[INFO] [stderr]   Downloaded libc v0.2.144
[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] d9f42ae178cf2232483a990c46eb05e7faf7782c59217f907cefb2107c7f219a
[INFO] running `Command { std: "docker" "start" "-a" "d9f42ae178cf2232483a990c46eb05e7faf7782c59217f907cefb2107c7f219a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9f42ae178cf2232483a990c46eb05e7faf7782c59217f907cefb2107c7f219a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9f42ae178cf2232483a990c46eb05e7faf7782c59217f907cefb2107c7f219a", kill_on_drop: false }`
[INFO] [stdout] d9f42ae178cf2232483a990c46eb05e7faf7782c59217f907cefb2107c7f219a
[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] fbe9a7262b3f7ee5340aa44e160d4a69c8e8c70adb62134e7fd4b171fdc0ab11
[INFO] running `Command { std: "docker" "start" "-a" "fbe9a7262b3f7ee5340aa44e160d4a69c8e8c70adb62134e7fd4b171fdc0ab11", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling serde_test v1.0.163
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking unsigned-varint v0.7.1
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking arbitrary v1.3.0
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]     Checking core2 v0.4.0
[INFO] [stderr]     Checking multihash v0.19.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> src/multihash.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use alloc::vec::Vec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/multihash.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use core::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking getrandom v0.2.9
[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 regex v1.8.4
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking quickcheck v1.0.3
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]  --> src/multihash.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use alloc::vec::Vec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Vec` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/multihash.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use core::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.33s
[INFO] running `Command { std: "docker" "inspect" "fbe9a7262b3f7ee5340aa44e160d4a69c8e8c70adb62134e7fd4b171fdc0ab11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbe9a7262b3f7ee5340aa44e160d4a69c8e8c70adb62134e7fd4b171fdc0ab11", kill_on_drop: false }`
[INFO] [stdout] fbe9a7262b3f7ee5340aa44e160d4a69c8e8c70adb62134e7fd4b171fdc0ab11