[INFO] fetching crate amfnengine 0.3.5...
[INFO] checking amfnengine-0.3.5 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate amfnengine 0.3.5 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate amfnengine 0.3.5 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 amfnengine 0.3.5
[INFO] finished tweaking crates.io crate amfnengine 0.3.5
[INFO] tweaked toml for crates.io crate amfnengine 0.3.5 written to /workspace/builds/worker-2-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 54 packages
[INFO] [stderr]       Adding aho-corasick v0.7.20 (latest: v1.1.3)
[INFO] [stderr]       Adding arrayvec v0.5.2 (latest: v0.7.4)
[INFO] [stderr]       Adding rand v0.3.23 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding regex v1.5.6 (latest: v1.10.4)
[INFO] [stderr]       Adding regex-syntax v0.6.29 (latest: v0.8.3)
[INFO] [stderr]       Adding rust_decimal v1.10.3 (latest: v1.35.0)
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[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 rdrand v0.4.0
[INFO] [stderr]   Downloaded libmath v0.2.1
[INFO] [stderr]   Downloaded fuchsia-cprng v0.1.1
[INFO] [stderr]   Downloaded rand v0.4.6
[INFO] [stderr]   Downloaded rand_core v0.4.2
[INFO] [stderr]   Downloaded compare v0.1.0
[INFO] [stderr]   Downloaded json v0.12.4
[INFO] [stderr]   Downloaded rand_core v0.3.1
[INFO] [stderr]   Downloaded regex v1.5.6
[INFO] [stderr]   Downloaded rand v0.3.23
[INFO] [stderr]   Downloaded arrayvec v0.5.2
[INFO] [stderr]   Downloaded rust_decimal v1.10.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] d72b833a74aa526a5fbc2c42a434a83a5de85a68d6b89b98ed7baa146b872252
[INFO] running `Command { std: "docker" "start" "-a" "d72b833a74aa526a5fbc2c42a434a83a5de85a68d6b89b98ed7baa146b872252", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d72b833a74aa526a5fbc2c42a434a83a5de85a68d6b89b98ed7baa146b872252", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d72b833a74aa526a5fbc2c42a434a83a5de85a68d6b89b98ed7baa146b872252", kill_on_drop: false }`
[INFO] [stdout] d72b833a74aa526a5fbc2c42a434a83a5de85a68d6b89b98ed7baa146b872252
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a77c2687c9dc7ec5309b8ccdf6ebf1f2561c9614c05da8e580b57d48b4279637
[INFO] running `Command { std: "docker" "start" "-a" "a77c2687c9dc7ec5309b8ccdf6ebf1f2561c9614c05da8e580b57d48b4279637", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking iana-time-zone v0.1.60
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking compare v0.1.0
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking libmath v0.2.1
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking chrono v0.4.37
[INFO] [stderr]     Checking rust_decimal v1.10.3
[INFO] [stderr]     Checking amfnengine v0.3.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Vec` is imported redundantly
[INFO] [stdout]   --> src/core/list_key.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::vec::Vec;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[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 `Vec` is imported redundantly
[INFO] [stdout]   --> src/core/list_key.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::vec::Vec;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.32s
[INFO] running `Command { std: "docker" "inspect" "a77c2687c9dc7ec5309b8ccdf6ebf1f2561c9614c05da8e580b57d48b4279637", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a77c2687c9dc7ec5309b8ccdf6ebf1f2561c9614c05da8e580b57d48b4279637", kill_on_drop: false }`
[INFO] [stdout] a77c2687c9dc7ec5309b8ccdf6ebf1f2561c9614c05da8e580b57d48b4279637