[INFO] fetching crate rammer 0.3.1...
[INFO] checking rammer-0.3.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate rammer 0.3.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate rammer 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 rammer 0.3.1
[INFO] finished tweaking crates.io crate rammer 0.3.1
[INFO] tweaked toml for crates.io crate rammer 0.3.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate rammer 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]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_json v1.0.71
[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] 8061e79c98f0b6164dad180a9f3f24e1c0bc43cc3b949105302eeb3561bd5452
[INFO] running `Command { std: "docker" "start" "-a" "8061e79c98f0b6164dad180a9f3f24e1c0bc43cc3b949105302eeb3561bd5452", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8061e79c98f0b6164dad180a9f3f24e1c0bc43cc3b949105302eeb3561bd5452", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8061e79c98f0b6164dad180a9f3f24e1c0bc43cc3b949105302eeb3561bd5452", kill_on_drop: false }`
[INFO] [stdout] 8061e79c98f0b6164dad180a9f3f24e1c0bc43cc3b949105302eeb3561bd5452
[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] 6c75cb7e9ed772260ee15bf76f8f0601f8376f1ad83db6a0aac247cb9b3278a2
[INFO] running `Command { std: "docker" "start" "-a" "6c75cb7e9ed772260ee15bf76f8f0601f8376f1ad83db6a0aac247cb9b3278a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling serde_json v1.0.71
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking rammer v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `HashMap` is imported redundantly
[INFO] [stdout]    --> src/bag_of_words.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 199 |     use super::*;
[INFO] [stdout]     |         -------- the item `HashMap` is already imported here
[INFO] [stdout] 200 |     use std::collections::HashMap;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[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 15.79s
[INFO] running `Command { std: "docker" "inspect" "6c75cb7e9ed772260ee15bf76f8f0601f8376f1ad83db6a0aac247cb9b3278a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c75cb7e9ed772260ee15bf76f8f0601f8376f1ad83db6a0aac247cb9b3278a2", kill_on_drop: false }`
[INFO] [stdout] 6c75cb7e9ed772260ee15bf76f8f0601f8376f1ad83db6a0aac247cb9b3278a2