[INFO] fetching crate fast-threadpool 0.3.0...
[INFO] checking fast-threadpool-0.3.0 against master#db0e836148accac8a22532e3596ac612b63c2d8e for pr-139272
[INFO] extracting crate fast-threadpool 0.3.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate fast-threadpool 0.3.0 on toolchain db0e836148accac8a22532e3596ac612b63c2d8e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fast-threadpool 0.3.0
[INFO] finished tweaking crates.io crate fast-threadpool 0.3.0
[INFO] tweaked toml for crates.io crate fast-threadpool 0.3.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 42 packages to latest compatible versions
[INFO] [stderr]       Adding async-oneshot v0.4.2 (available: v0.5.9)
[INFO] [stderr]       Adding flume v0.10.14 (available: v0.11.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-oneshot v0.4.2
[INFO] [stderr]   Downloaded futures-micro v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e6486478314efd52a87fad924f83001e7ed852380a59ca6d5f01d9ed99a5e5b3
[INFO] running `Command { std: "docker" "start" "-a" "e6486478314efd52a87fad924f83001e7ed852380a59ca6d5f01d9ed99a5e5b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e6486478314efd52a87fad924f83001e7ed852380a59ca6d5f01d9ed99a5e5b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6486478314efd52a87fad924f83001e7ed852380a59ca6d5f01d9ed99a5e5b3", kill_on_drop: false }`
[INFO] [stdout] e6486478314efd52a87fad924f83001e7ed852380a59ca6d5f01d9ed99a5e5b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+db0e836148accac8a22532e3596ac612b63c2d8e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afb2efd21f714f527b811345e57f9bb3bb8f5596671d37ab59fe5fc3ce1fbebf
[INFO] running `Command { std: "docker" "start" "-a" "afb2efd21f714f527b811345e57f9bb3bb8f5596671d37ab59fe5fc3ce1fbebf", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]     Checking futures-sink v0.3.31
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking pin-project-lite v0.2.16
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-io v0.3.31
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]     Checking futures-task v0.3.31
[INFO] [stderr]     Checking futures-micro v0.3.1
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]     Checking async-oneshot v0.4.2
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling lock_api v0.4.12
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking nanorand v0.7.0
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking pin-project v1.1.10
[INFO] [stderr]     Checking flume v0.10.14
[INFO] [stderr]     Checking fast-threadpool v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/handler.rs:80:26
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct JoinHandle<R>(FlumeSender<R>, FlumeReceiver<R>);
[INFO] [stdout]    |            ----------    ^^^^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `JoinHandle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 80 - pub struct JoinHandle<R>(FlumeSender<R>, FlumeReceiver<R>);
[INFO] [stdout] 80 + pub struct JoinHandle<R>((), FlumeReceiver<R>);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/handler.rs:80:26
[INFO] [stdout]    |
[INFO] [stdout] 80 | pub struct JoinHandle<R>(FlumeSender<R>, FlumeReceiver<R>);
[INFO] [stdout]    |            ----------    ^^^^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `JoinHandle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 80 - pub struct JoinHandle<R>(FlumeSender<R>, FlumeReceiver<R>);
[INFO] [stdout] 80 + pub struct JoinHandle<R>((), FlumeReceiver<R>);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.95s
[INFO] running `Command { std: "docker" "inspect" "afb2efd21f714f527b811345e57f9bb3bb8f5596671d37ab59fe5fc3ce1fbebf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afb2efd21f714f527b811345e57f9bb3bb8f5596671d37ab59fe5fc3ce1fbebf", kill_on_drop: false }`
[INFO] [stdout] afb2efd21f714f527b811345e57f9bb3bb8f5596671d37ab59fe5fc3ce1fbebf