[INFO] fetching crate messaging_thread_pool 3.1.0...
[INFO] checking messaging_thread_pool-3.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate messaging_thread_pool 3.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate messaging_thread_pool 3.1.0 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 messaging_thread_pool 3.1.0
[INFO] finished tweaking crates.io crate messaging_thread_pool 3.1.0
[INFO] tweaked toml for crates.io crate messaging_thread_pool 3.1.0 written to /workspace/builds/worker-6-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 96 packages
[INFO] [stderr]       Adding anes v0.1.6 (latest: v0.2.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v3.2.25 (latest: v4.5.4)
[INFO] [stderr]       Adding clap_lex v0.2.4 (latest: v0.7.0)
[INFO] [stderr]       Adding criterion v0.4.0 (latest: v0.5.1)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding nu-ansi-term v0.46.0 (latest: v0.50.0)
[INFO] [stderr]       Adding os_str_bytes v6.6.1 (latest: v7.0.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tracing-appender v0.2.3
[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] 3a933ed0d8a7e4c028b907cb75dfea34deaf99884a3e27f07fb773a9efa4f85b
[INFO] running `Command { std: "docker" "start" "-a" "3a933ed0d8a7e4c028b907cb75dfea34deaf99884a3e27f07fb773a9efa4f85b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a933ed0d8a7e4c028b907cb75dfea34deaf99884a3e27f07fb773a9efa4f85b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a933ed0d8a7e4c028b907cb75dfea34deaf99884a3e27f07fb773a9efa4f85b", kill_on_drop: false }`
[INFO] [stdout] 3a933ed0d8a7e4c028b907cb75dfea34deaf99884a3e27f07fb773a9efa4f85b
[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] fdaac7d54b1469629d9c96ea1624c9e86335313dcfa2c440e5130c0b469ad26c
[INFO] running `Command { std: "docker" "start" "-a" "fdaac7d54b1469629d9c96ea1624c9e86335313dcfa2c440e5130c0b469ad26c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xoshiro v0.6.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stderr]     Checking tracing-appender v0.2.3
[INFO] [stderr]     Checking messaging_thread_pool v3.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `GuardDrop` is imported redundantly
[INFO] [stdout]  --> src/samples/randoms/pool_item.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     guard_drop::GuardDrop,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |     samples::{MeanResponse, RandomsAddRequest, SumResponse},
[INFO] [stdout] 5 |     *,
[INFO] [stdout]   |     - the item `GuardDrop` 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] [stdout] warning: the item `GuardDrop` is imported redundantly
[INFO] [stdout]  --> src/samples/randoms/pool_item.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     guard_drop::GuardDrop,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |     samples::{MeanResponse, RandomsAddRequest, SumResponse},
[INFO] [stdout] 5 |     *,
[INFO] [stdout]   |     - the item `GuardDrop` 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 13.71s
[INFO] running `Command { std: "docker" "inspect" "fdaac7d54b1469629d9c96ea1624c9e86335313dcfa2c440e5130c0b469ad26c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdaac7d54b1469629d9c96ea1624c9e86335313dcfa2c440e5130c0b469ad26c", kill_on_drop: false }`
[INFO] [stdout] fdaac7d54b1469629d9c96ea1624c9e86335313dcfa2c440e5130c0b469ad26c
[INFO] checking messaging_thread_pool-3.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate messaging_thread_pool 3.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate messaging_thread_pool 3.1.0 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 messaging_thread_pool 3.1.0
[INFO] finished tweaking crates.io crate messaging_thread_pool 3.1.0
[INFO] tweaked toml for crates.io crate messaging_thread_pool 3.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 96 packages
[INFO] [stderr]       Adding anes v0.1.6 (latest: v0.2.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding clap v3.2.25 (latest: v4.5.4)
[INFO] [stderr]       Adding clap_lex v0.2.4 (latest: v0.7.0)
[INFO] [stderr]       Adding criterion v0.4.0 (latest: v0.5.1)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding hermit-abi v0.1.19 (latest: v0.3.9)
[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding nu-ansi-term v0.46.0 (latest: v0.50.0)
[INFO] [stderr]       Adding os_str_bytes v6.6.1 (latest: v7.0.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe94589e3882071c9a5000d2987dddb274ecfaf2b54b1c437cc4d0ecabdadf73
[INFO] running `Command { std: "docker" "start" "-a" "fe94589e3882071c9a5000d2987dddb274ecfaf2b54b1c437cc4d0ecabdadf73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe94589e3882071c9a5000d2987dddb274ecfaf2b54b1c437cc4d0ecabdadf73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe94589e3882071c9a5000d2987dddb274ecfaf2b54b1c437cc4d0ecabdadf73", kill_on_drop: false }`
[INFO] [stdout] fe94589e3882071c9a5000d2987dddb274ecfaf2b54b1c437cc4d0ecabdadf73
[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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9c1d0bbcb1b9ea5ddac3235af2e13e7dcd8bdfb980aca3630333ade91e32ee4
[INFO] running `Command { std: "docker" "start" "-a" "d9c1d0bbcb1b9ea5ddac3235af2e13e7dcd8bdfb980aca3630333ade91e32ee4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking time v0.3.34
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking thiserror v1.0.58
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_xoshiro v0.6.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stderr]     Checking tracing-appender v0.2.3
[INFO] [stderr]     Checking messaging_thread_pool v3.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `GuardDrop` is imported redundantly
[INFO] [stdout]  --> src/samples/randoms/pool_item.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     guard_drop::GuardDrop,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |     samples::{MeanResponse, RandomsAddRequest, SumResponse},
[INFO] [stdout] 5 |     *,
[INFO] [stdout]   |     - the item `GuardDrop` 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] [stdout] warning: the item `GuardDrop` is imported redundantly
[INFO] [stdout]  --> src/samples/randoms/pool_item.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     guard_drop::GuardDrop,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |     samples::{MeanResponse, RandomsAddRequest, SumResponse},
[INFO] [stdout] 5 |     *,
[INFO] [stdout]   |     - the item `GuardDrop` 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 15.30s
[INFO] running `Command { std: "docker" "inspect" "d9c1d0bbcb1b9ea5ddac3235af2e13e7dcd8bdfb980aca3630333ade91e32ee4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9c1d0bbcb1b9ea5ddac3235af2e13e7dcd8bdfb980aca3630333ade91e32ee4", kill_on_drop: false }`
[INFO] [stdout] d9c1d0bbcb1b9ea5ddac3235af2e13e7dcd8bdfb980aca3630333ade91e32ee4