[INFO] fetching crate fast-threadpool 0.3.0...
[INFO] checking fast-threadpool-0.3.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate fast-threadpool 0.3.0 into /workspace/builds/worker-1-tc1/source
[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-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fast-threadpool 0.3.0 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-micro v0.3.1
[INFO] [stderr]   Downloaded async-oneshot v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 00c158cda245faf2abcff894775c1d4e3b6587be5da54ba18f16329e40828bc3
[INFO] running `Command { std: "docker" "start" "-a" "00c158cda245faf2abcff894775c1d4e3b6587be5da54ba18f16329e40828bc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00c158cda245faf2abcff894775c1d4e3b6587be5da54ba18f16329e40828bc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00c158cda245faf2abcff894775c1d4e3b6587be5da54ba18f16329e40828bc3", kill_on_drop: false }`
[INFO] [stdout] 00c158cda245faf2abcff894775c1d4e3b6587be5da54ba18f16329e40828bc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9400c045341976d679ff0d5ee6ebc7f7e91eabc12a2a74a73541b3f0509eacea
[INFO] running `Command { std: "docker" "start" "-a" "9400c045341976d679ff0d5ee6ebc7f7e91eabc12a2a74a73541b3f0509eacea", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-sink v0.3.31
[INFO] [stderr]     Checking futures-core v0.3.31
[INFO] [stderr]     Checking futures-micro v0.3.1
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking num_cpus v1.17.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.10
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking async-oneshot v0.4.2
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]     Checking nanorand v0.7.0
[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 4.48s
[INFO] running `Command { std: "docker" "inspect" "9400c045341976d679ff0d5ee6ebc7f7e91eabc12a2a74a73541b3f0509eacea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9400c045341976d679ff0d5ee6ebc7f7e91eabc12a2a74a73541b3f0509eacea", kill_on_drop: false }`
[INFO] [stdout] 9400c045341976d679ff0d5ee6ebc7f7e91eabc12a2a74a73541b3f0509eacea