[INFO] fetching crate tokio-lxi 0.2.2...
[INFO] checking tokio-lxi-0.2.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate tokio-lxi 0.2.2 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate tokio-lxi 0.2.2 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 tokio-lxi 0.2.2
[INFO] finished tweaking crates.io crate tokio-lxi 0.2.2
[INFO] tweaked toml for crates.io crate tokio-lxi 0.2.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate tokio-lxi 0.2.2 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 value-bag v1.0.0-alpha.7
[INFO] [stderr]   Downloaded ctor v0.1.20
[INFO] [stderr]   Downloaded gloo-timers v0.2.1
[INFO] [stderr]   Downloaded futures-core v0.3.16
[INFO] [stderr]   Downloaded futures-io v0.3.16
[INFO] [stderr]   Downloaded futures-task v0.3.16
[INFO] [stderr]   Downloaded async-task v4.0.3
[INFO] [stderr]   Downloaded blocking v1.0.2
[INFO] [stderr]   Downloaded async-global-executor v2.0.2
[INFO] [stderr]   Downloaded tokio v1.10.0
[INFO] [stderr]   Downloaded cache-padded v1.1.1
[INFO] [stderr]   Downloaded polling v2.1.0
[INFO] [stderr]   Downloaded event-listener v2.5.1
[INFO] [stderr]   Downloaded async-lock v2.4.0
[INFO] [stderr]   Downloaded fastrand v1.5.0
[INFO] [stderr]   Downloaded futures-channel v0.3.16
[INFO] [stderr]   Downloaded async-std v1.9.0
[INFO] [stderr]   Downloaded futures-util v0.3.16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 4dfcdbbf77a8e47e863f509657fc3962a251ea6c435ba5f05e7765038c40e7b4
[INFO] running `Command { std: "docker" "start" "-a" "4dfcdbbf77a8e47e863f509657fc3962a251ea6c435ba5f05e7765038c40e7b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dfcdbbf77a8e47e863f509657fc3962a251ea6c435ba5f05e7765038c40e7b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dfcdbbf77a8e47e863f509657fc3962a251ea6c435ba5f05e7765038c40e7b4", kill_on_drop: false }`
[INFO] [stdout] 4dfcdbbf77a8e47e863f509657fc3962a251ea6c435ba5f05e7765038c40e7b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 371ea052d59737fc60ebeb3eab99f2dc3123ca9f3aec50bfd88855a01bef6bb9
[INFO] running `Command { std: "docker" "start" "-a" "371ea052d59737fc60ebeb3eab99f2dc3123ca9f3aec50bfd88855a01bef6bb9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling anyhow v1.0.43
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling tokio v1.10.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking tokio-lxi v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BufReader` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:119:33
[INFO] [stdout]     |
[INFO] [stdout] 116 |     use super::*;
[INFO] [stdout]     |         -------- the item `BufReader` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 119 |     use runtime::{AsyncReadExt, BufReader, TcpListener};
[INFO] [stdout]     |                                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> examples/idn.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` 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 9.81s
[INFO] running `Command { std: "docker" "inspect" "371ea052d59737fc60ebeb3eab99f2dc3123ca9f3aec50bfd88855a01bef6bb9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "371ea052d59737fc60ebeb3eab99f2dc3123ca9f3aec50bfd88855a01bef6bb9", kill_on_drop: false }`
[INFO] [stdout] 371ea052d59737fc60ebeb3eab99f2dc3123ca9f3aec50bfd88855a01bef6bb9
[INFO] checking tokio-lxi-0.2.2 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate tokio-lxi 0.2.2 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate tokio-lxi 0.2.2 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 tokio-lxi 0.2.2
[INFO] finished tweaking crates.io crate tokio-lxi 0.2.2
[INFO] tweaked toml for crates.io crate tokio-lxi 0.2.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate crates.io crate tokio-lxi 0.2.2 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 5fc08616a2e47d39bfa0630fdc1a435758c4770879bd5a8d363e1d6d745c3fcc
[INFO] running `Command { std: "docker" "start" "-a" "5fc08616a2e47d39bfa0630fdc1a435758c4770879bd5a8d363e1d6d745c3fcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fc08616a2e47d39bfa0630fdc1a435758c4770879bd5a8d363e1d6d745c3fcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fc08616a2e47d39bfa0630fdc1a435758c4770879bd5a8d363e1d6d745c3fcc", kill_on_drop: false }`
[INFO] [stdout] 5fc08616a2e47d39bfa0630fdc1a435758c4770879bd5a8d363e1d6d745c3fcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] efd2b72ca7f436f4246a04acd8cb5ddb633ed9d4290715b5c744e7f8e5642204
[INFO] running `Command { std: "docker" "start" "-a" "efd2b72ca7f436f4246a04acd8cb5ddb633ed9d4290715b5c744e7f8e5642204", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling anyhow v1.0.43
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling tokio v1.10.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking tokio-lxi v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BufReader` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:119:33
[INFO] [stdout]     |
[INFO] [stdout] 116 |     use super::*;
[INFO] [stdout]     |         -------- the item `BufReader` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 119 |     use runtime::{AsyncReadExt, BufReader, TcpListener};
[INFO] [stdout]     |                                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tokio` is imported redundantly
[INFO] [stdout]  --> examples/idn.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use tokio;
[INFO] [stdout]   |     ^^^^^ the item `tokio` 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 9.09s
[INFO] running `Command { std: "docker" "inspect" "efd2b72ca7f436f4246a04acd8cb5ddb633ed9d4290715b5c744e7f8e5642204", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efd2b72ca7f436f4246a04acd8cb5ddb633ed9d4290715b5c744e7f8e5642204", kill_on_drop: false }`
[INFO] [stdout] efd2b72ca7f436f4246a04acd8cb5ddb633ed9d4290715b5c744e7f8e5642204