[INFO] fetching crate dudect-bencher 0.6.0...
[INFO] checking dudect-bencher-0.6.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate dudect-bencher 0.6.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate dudect-bencher 0.6.0 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 dudect-bencher 0.6.0
[INFO] finished tweaking crates.io crate dudect-bencher 0.6.0
[INFO] tweaked toml for crates.io crate dudect-bencher 0.6.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate dudect-bencher 0.6.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded ctrlc v3.4.1
[INFO] [stderr]   Downloaded nix v0.27.1
[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] 3520a461e9115ec0aa42a7f934d843ffb27faf1976d7d0f322e3fc48f618468b
[INFO] running `Command { std: "docker" "start" "-a" "3520a461e9115ec0aa42a7f934d843ffb27faf1976d7d0f322e3fc48f618468b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3520a461e9115ec0aa42a7f934d843ffb27faf1976d7d0f322e3fc48f618468b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3520a461e9115ec0aa42a7f934d843ffb27faf1976d7d0f322e3fc48f618468b", kill_on_drop: false }`
[INFO] [stdout] 3520a461e9115ec0aa42a7f934d843ffb27faf1976d7d0f322e3fc48f618468b
[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] 8d2751f21918141b1c77954b7bf073eefaeef1604c17d3534ff3233f4793302d
[INFO] running `Command { std: "docker" "start" "-a" "8d2751f21918141b1c77954b7bf073eefaeef1604c17d3534ff3233f4793302d", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking nix v0.27.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.34.0
[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 ctrlc v3.4.1
[INFO] [stderr]     Checking dudect-bencher v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ctrlc` is imported redundantly
[INFO] [stdout]   --> src/ctbench.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use ctrlc;
[INFO] [stdout]    |     ^^^^^ the item `ctrlc` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ctrlc` is imported redundantly
[INFO] [stdout]   --> src/ctbench.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use ctrlc;
[INFO] [stdout]    |     ^^^^^ the item `ctrlc` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.83s
[INFO] running `Command { std: "docker" "inspect" "8d2751f21918141b1c77954b7bf073eefaeef1604c17d3534ff3233f4793302d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d2751f21918141b1c77954b7bf073eefaeef1604c17d3534ff3233f4793302d", kill_on_drop: false }`
[INFO] [stdout] 8d2751f21918141b1c77954b7bf073eefaeef1604c17d3534ff3233f4793302d
[INFO] checking dudect-bencher-0.6.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate dudect-bencher 0.6.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate dudect-bencher 0.6.0 on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dudect-bencher 0.6.0
[INFO] finished tweaking crates.io crate dudect-bencher 0.6.0
[INFO] tweaked toml for crates.io crate dudect-bencher 0.6.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate dudect-bencher 0.6.0 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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7c9934a499906a50318337ccbd5aa1dc28cf3babbe75c18e283ef7715ca4eb46
[INFO] running `Command { std: "docker" "start" "-a" "7c9934a499906a50318337ccbd5aa1dc28cf3babbe75c18e283ef7715ca4eb46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7c9934a499906a50318337ccbd5aa1dc28cf3babbe75c18e283ef7715ca4eb46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c9934a499906a50318337ccbd5aa1dc28cf3babbe75c18e283ef7715ca4eb46", kill_on_drop: false }`
[INFO] [stdout] 7c9934a499906a50318337ccbd5aa1dc28cf3babbe75c18e283ef7715ca4eb46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 92de8aa4eb0cd60a8411d9522b4aacb09a4f20ce26004cf1eeccc390488f615b
[INFO] running `Command { std: "docker" "start" "-a" "92de8aa4eb0cd60a8411d9522b4aacb09a4f20ce26004cf1eeccc390488f615b", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking nix v0.27.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking ctrlc v3.4.1
[INFO] [stderr]     Checking dudect-bencher v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `ctrlc` is imported redundantly
[INFO] [stdout]   --> src/ctbench.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use ctrlc;
[INFO] [stdout]    |     ^^^^^ the item `ctrlc` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ctrlc` is imported redundantly
[INFO] [stdout]   --> src/ctbench.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use ctrlc;
[INFO] [stdout]    |     ^^^^^ the item `ctrlc` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.29s
[INFO] running `Command { std: "docker" "inspect" "92de8aa4eb0cd60a8411d9522b4aacb09a4f20ce26004cf1eeccc390488f615b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92de8aa4eb0cd60a8411d9522b4aacb09a4f20ce26004cf1eeccc390488f615b", kill_on_drop: false }`
[INFO] [stdout] 92de8aa4eb0cd60a8411d9522b4aacb09a4f20ce26004cf1eeccc390488f615b