[INFO] fetching crate async-io 2.2.1...
[INFO] checking async-io-2.2.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate async-io 2.2.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate async-io 2.2.1 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 async-io 2.2.1
[INFO] finished tweaking crates.io crate async-io 2.2.1
[INFO] tweaked toml for crates.io crate async-io 2.2.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate async-io 2.2.1 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded windows-targets v0.52.0
[INFO] [stderr]   Downloaded inotify-sys v0.1.5
[INFO] [stderr]   Downloaded timerfd v1.5.0
[INFO] [stderr]   Downloaded async-channel v2.1.0
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[INFO] [stderr]   Downloaded windows_aarch64_msvc v0.52.0
[INFO] [stderr]   Downloaded windows_i686_gnu v0.52.0
[INFO] [stderr]   Downloaded windows_i686_msvc v0.52.0
[INFO] [stderr]   Downloaded windows_x86_64_gnu v0.52.0
[INFO] [stderr]   Downloaded windows_x86_64_msvc v0.52.0
[INFO] [stderr]   Downloaded criterion v0.4.0
[INFO] [stderr]   Downloaded half v1.8.2
[INFO] [stderr]   Downloaded textwrap v0.16.0
[INFO] [stderr]   Downloaded futures-lite v2.0.1
[INFO] [stderr]   Downloaded polling v3.3.0
[INFO] [stderr]   Downloaded async-lock v3.1.1
[INFO] [stderr]   Downloaded async-task v4.5.0
[INFO] [stderr]   Downloaded ciborium v0.2.1
[INFO] [stderr]   Downloaded criterion-plot v0.5.0
[INFO] [stderr]   Downloaded tinytemplate v1.2.1
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[INFO] [stderr]   Downloaded inotify v0.10.2
[INFO] [stderr]   Downloaded tempfile v3.8.1
[INFO] [stderr]   Downloaded os_str_bytes v6.6.1
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[INFO] [stderr]   Downloaded ciborium-io v0.2.1
[INFO] [stderr]   Downloaded oorandom v11.1.3
[INFO] [stderr]   Downloaded fastrand v2.0.1
[INFO] [stderr]   Downloaded errno v0.3.7
[INFO] [stderr]   Downloaded uds_windows v1.0.2
[INFO] [stderr]   Downloaded cast v0.3.0
[INFO] [stderr]   Downloaded concurrent-queue v2.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 1d48c1003644fb78decd468ff6754b588b265d394671cd82e06419ff2ffed9d6
[INFO] running `Command { std: "docker" "start" "-a" "1d48c1003644fb78decd468ff6754b588b265d394671cd82e06419ff2ffed9d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d48c1003644fb78decd468ff6754b588b265d394671cd82e06419ff2ffed9d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d48c1003644fb78decd468ff6754b588b265d394671cd82e06419ff2ffed9d6", kill_on_drop: false }`
[INFO] [stdout] 1d48c1003644fb78decd468ff6754b588b265d394671cd82e06419ff2ffed9d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] a8bb402904e080d04ae901d9633027cce8bb8601f5aa0636b03bd0a52727b18f
[INFO] running `Command { std: "docker" "start" "-a" "a8bb402904e080d04ae901d9633027cce8bb8601f5aa0636b03bd0a52727b18f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]    Compiling futures-core v0.3.29
[INFO] [stderr]     Checking fastrand v2.0.1
[INFO] [stderr]    Compiling rustix v0.38.25
[INFO] [stderr]     Checking linux-raw-sys v0.4.11
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]     Checking futures-io v0.3.29
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling serde_json v1.0.108
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]     Checking os_str_bytes v6.6.1
[INFO] [stderr]    Compiling rustix v0.37.27
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking ciborium-io v0.2.1
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking piper v0.2.1
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking async-task v4.5.0
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]     Checking ciborium-ll v0.2.1
[INFO] [stderr]     Checking walkdir v2.4.0
[INFO] [stderr]     Checking concurrent-queue v2.3.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking futures-lite v2.0.1
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking event-listener v3.1.0
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]     Checking event-listener-strategy v0.3.0
[INFO] [stderr]     Checking async-lock v3.1.1
[INFO] [stderr]     Checking async-channel v2.1.0
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking blocking v1.5.1
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking io-lifetimes v1.0.11
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]     Checking inotify v0.10.2
[INFO] [stderr]    Compiling serde_derive v1.0.193
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]     Checking timerfd v1.5.0
[INFO] [stderr]     Checking polling v3.3.0
[INFO] [stderr]     Checking tempfile v3.8.1
[INFO] [stderr]     Checking async-io v2.2.0
[INFO] [stderr]     Checking async-io v2.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking async-net v2.0.0
[INFO] [stderr]     Checking ciborium v0.2.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]   --> tests/async.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use std::future::Future;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 11 | use futures_lite::{future, prelude::*};
[INFO] [stdout]    |                            ---------- the item `Future` is already imported 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.18s
[INFO] running `Command { std: "docker" "inspect" "a8bb402904e080d04ae901d9633027cce8bb8601f5aa0636b03bd0a52727b18f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8bb402904e080d04ae901d9633027cce8bb8601f5aa0636b03bd0a52727b18f", kill_on_drop: false }`
[INFO] [stdout] a8bb402904e080d04ae901d9633027cce8bb8601f5aa0636b03bd0a52727b18f
[INFO] checking async-io-2.2.1 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate async-io 2.2.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate async-io 2.2.1 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async-io 2.2.1
[INFO] finished tweaking crates.io crate async-io 2.2.1
[INFO] tweaked toml for crates.io crate async-io 2.2.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate crates.io crate async-io 2.2.1 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f46ade0dc39a79928f02bc8bac54cadb3defaa8e1e3600d848f8cb2410bdbee
[INFO] running `Command { std: "docker" "start" "-a" "2f46ade0dc39a79928f02bc8bac54cadb3defaa8e1e3600d848f8cb2410bdbee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f46ade0dc39a79928f02bc8bac54cadb3defaa8e1e3600d848f8cb2410bdbee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f46ade0dc39a79928f02bc8bac54cadb3defaa8e1e3600d848f8cb2410bdbee", kill_on_drop: false }`
[INFO] [stdout] 2f46ade0dc39a79928f02bc8bac54cadb3defaa8e1e3600d848f8cb2410bdbee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 947861f6bbb110f4e25210c45c36cd4a2526eceaad9f785ea18817317c86efeb
[INFO] running `Command { std: "docker" "start" "-a" "947861f6bbb110f4e25210c45c36cd4a2526eceaad9f785ea18817317c86efeb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking pin-project-lite v0.2.13
[INFO] [stderr]    Compiling futures-core v0.3.29
[INFO] [stderr]    Compiling rustix v0.38.25
[INFO] [stderr]     Checking fastrand v2.0.1
[INFO] [stderr]     Checking linux-raw-sys v0.4.11
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]     Checking futures-io v0.3.29
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling serde_json v1.0.108
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking itoa v1.0.9
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking os_str_bytes v6.6.1
[INFO] [stderr]     Checking ciborium-io v0.2.1
[INFO] [stderr]     Checking ryu v1.0.15
[INFO] [stderr]    Compiling rustix v0.37.27
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking ciborium-ll v0.2.1
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking piper v0.2.1
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking futures-lite v2.0.1
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking async-task v4.5.0
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]     Checking concurrent-queue v2.3.0
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking walkdir v2.4.0
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking event-listener v3.1.0
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]     Checking event-listener-strategy v0.3.0
[INFO] [stderr]     Checking async-lock v3.1.1
[INFO] [stderr]     Checking async-channel v2.1.0
[INFO] [stderr]     Checking io-lifetimes v1.0.11
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking getrandom v0.2.11
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking blocking v1.5.1
[INFO] [stderr]     Checking inotify v0.10.2
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.193
[INFO] [stderr]     Checking timerfd v1.5.0
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]     Checking polling v3.3.0
[INFO] [stderr]     Checking tempfile v3.8.1
[INFO] [stderr]     Checking async-io v2.2.0
[INFO] [stderr]     Checking async-io v2.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking async-net v2.0.0
[INFO] [stderr]     Checking ciborium v0.2.1
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]   --> tests/async.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use std::future::Future;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 11 | use futures_lite::{future, prelude::*};
[INFO] [stdout]    |                            ---------- the item `Future` is already imported 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.65s
[INFO] running `Command { std: "docker" "inspect" "947861f6bbb110f4e25210c45c36cd4a2526eceaad9f785ea18817317c86efeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "947861f6bbb110f4e25210c45c36cd4a2526eceaad9f785ea18817317c86efeb", kill_on_drop: false }`
[INFO] [stdout] 947861f6bbb110f4e25210c45c36cd4a2526eceaad9f785ea18817317c86efeb