[INFO] fetching crate mailbox_processor_rs 0.3.0...
[INFO] checking mailbox_processor_rs-0.3.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate mailbox_processor_rs 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate mailbox_processor_rs 0.3.0 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 mailbox_processor_rs 0.3.0
[INFO] finished tweaking crates.io crate mailbox_processor_rs 0.3.0
[INFO] tweaked toml for crates.io crate mailbox_processor_rs 0.3.0 written to /workspace/builds/worker-4-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]     Updating crates.io index
[INFO] [stderr]      Locking 27 packages
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[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] 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] 5607e6a2c9bc509bc016f5de0d5560939e63f9ab22e4bda374b6b4a035f88090
[INFO] running `Command { std: "docker" "start" "-a" "5607e6a2c9bc509bc016f5de0d5560939e63f9ab22e4bda374b6b4a035f88090", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5607e6a2c9bc509bc016f5de0d5560939e63f9ab22e4bda374b6b4a035f88090", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5607e6a2c9bc509bc016f5de0d5560939e63f9ab22e4bda374b6b4a035f88090", kill_on_drop: false }`
[INFO] [stdout] 5607e6a2c9bc509bc016f5de0d5560939e63f9ab22e4bda374b6b4a035f88090
[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] a62de6ee264b5b910b81378cbf62d36495d60eb9901dcc403d790d3649d56186
[INFO] running `Command { std: "docker" "start" "-a" "a62de6ee264b5b910b81378cbf62d36495d60eb9901dcc403d790d3649d56186", kill_on_drop: false }`
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking tokio-stream v0.1.15
[INFO] [stderr]     Checking mailbox_processor_rs v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `mpsc` is imported redundantly
[INFO] [stdout]  --> src/callback.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                   ^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `mpsc` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `oneshot` is imported redundantly
[INFO] [stdout]  --> src/callback.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                         ^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `oneshot` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mpsc` is imported redundantly
[INFO] [stdout]  --> src/plain.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                   ^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `mpsc` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `oneshot` is imported redundantly
[INFO] [stdout]  --> src/plain.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                         ^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `oneshot` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-test v0.4.4
[INFO] [stdout] warning: the item `mpsc` is imported redundantly
[INFO] [stdout]  --> src/callback.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                   ^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `mpsc` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `oneshot` is imported redundantly
[INFO] [stdout]  --> src/callback.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                         ^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `oneshot` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mpsc` is imported redundantly
[INFO] [stdout]  --> src/plain.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                   ^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `mpsc` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `oneshot` is imported redundantly
[INFO] [stdout]  --> src/plain.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                         ^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `oneshot` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.59s
[INFO] running `Command { std: "docker" "inspect" "a62de6ee264b5b910b81378cbf62d36495d60eb9901dcc403d790d3649d56186", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a62de6ee264b5b910b81378cbf62d36495d60eb9901dcc403d790d3649d56186", kill_on_drop: false }`
[INFO] [stdout] a62de6ee264b5b910b81378cbf62d36495d60eb9901dcc403d790d3649d56186
[INFO] checking mailbox_processor_rs-0.3.0 against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] extracting crate mailbox_processor_rs 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate mailbox_processor_rs 0.3.0 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 mailbox_processor_rs 0.3.0
[INFO] finished tweaking crates.io crate mailbox_processor_rs 0.3.0
[INFO] tweaked toml for crates.io crate mailbox_processor_rs 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] ed02a5dcc9c6b721ffd16c80593a0d617b042f20b67d853d898b8d9de2d25da1
[INFO] running `Command { std: "docker" "start" "-a" "ed02a5dcc9c6b721ffd16c80593a0d617b042f20b67d853d898b8d9de2d25da1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed02a5dcc9c6b721ffd16c80593a0d617b042f20b67d853d898b8d9de2d25da1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed02a5dcc9c6b721ffd16c80593a0d617b042f20b67d853d898b8d9de2d25da1", kill_on_drop: false }`
[INFO] [stdout] ed02a5dcc9c6b721ffd16c80593a0d617b042f20b67d853d898b8d9de2d25da1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 9c574ec8d432a7ba3e8b9753f92dc05d7de2510a27abc25db611618d777223c2
[INFO] running `Command { std: "docker" "start" "-a" "9c574ec8d432a7ba3e8b9753f92dc05d7de2510a27abc25db611618d777223c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking tokio-stream v0.1.15
[INFO] [stderr]     Checking mailbox_processor_rs v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `mpsc` is imported redundantly
[INFO] [stdout]  --> src/callback.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                   ^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `mpsc` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `oneshot` is imported redundantly
[INFO] [stdout]  --> src/callback.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                         ^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `oneshot` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mpsc` is imported redundantly
[INFO] [stdout]  --> src/plain.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                   ^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `mpsc` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `oneshot` is imported redundantly
[INFO] [stdout]  --> src/plain.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                         ^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `oneshot` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tokio-test v0.4.4
[INFO] [stdout] warning: the item `mpsc` is imported redundantly
[INFO] [stdout]  --> src/callback.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                   ^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `mpsc` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `oneshot` is imported redundantly
[INFO] [stdout]  --> src/callback.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                         ^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `oneshot` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mpsc` is imported redundantly
[INFO] [stdout]  --> src/plain.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                   ^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `mpsc` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `oneshot` is imported redundantly
[INFO] [stdout]  --> src/plain.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tokio::sync::{mpsc, oneshot};
[INFO] [stdout]   |                         ^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `oneshot` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.16s
[INFO] running `Command { std: "docker" "inspect" "9c574ec8d432a7ba3e8b9753f92dc05d7de2510a27abc25db611618d777223c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c574ec8d432a7ba3e8b9753f92dc05d7de2510a27abc25db611618d777223c2", kill_on_drop: false }`
[INFO] [stdout] 9c574ec8d432a7ba3e8b9753f92dc05d7de2510a27abc25db611618d777223c2