[INFO] fetching crate slave-pool 0.2.2...
[INFO] checking slave-pool-0.2.2 against try#ffa4a0215752773248fb0f0a8092f1c3e7907e9e for pr-75585
[INFO] extracting crate slave-pool 0.2.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate slave-pool 0.2.2 on toolchain ffa4a0215752773248fb0f0a8092f1c3e7907e9e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slave-pool 0.2.2
[INFO] finished tweaking crates.io crate slave-pool 0.2.2
[INFO] tweaked toml for crates.io crate slave-pool 0.2.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1115dafd6fd03cdeac732d0518f521633445438eab727aafeea9129222b9c623
[INFO] running `Command { std: "docker" "start" "-a" "1115dafd6fd03cdeac732d0518f521633445438eab727aafeea9129222b9c623", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1115dafd6fd03cdeac732d0518f521633445438eab727aafeea9129222b9c623", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1115dafd6fd03cdeac732d0518f521633445438eab727aafeea9129222b9c623", kill_on_drop: false }`
[INFO] [stdout] 1115dafd6fd03cdeac732d0518f521633445438eab727aafeea9129222b9c623
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+ffa4a0215752773248fb0f0a8092f1c3e7907e9e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 44d3b23390714b30a6559a15c855b9bd14315d423e84f5adbf0c94331e952fb7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "44d3b23390714b30a6559a15c855b9bd14315d423e84f5adbf0c94331e952fb7", kill_on_drop: false }`
[INFO] [stderr]     Checking crossbeam-channel v0.4.3
[INFO] [stderr]     Checking slave-pool v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0412]: cannot find type `Sender` in crate `crossbeam_channel`
[INFO] [stdout]    --> src/lib.rs:121:30
[INFO] [stdout]     |
[INFO] [stdout] 121 |     send: crossbeam_channel::Sender<Message>,
[INFO] [stdout]     |                              ^^^^^^ not found in `crossbeam_channel`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 48  | use crate::oneshot::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 48  | use std::sync::mpsc::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Receiver` in crate `crossbeam_channel`
[INFO] [stdout]    --> src/lib.rs:122:30
[INFO] [stdout]     |
[INFO] [stdout] 122 |     recv: crossbeam_channel::Receiver<Message>,
[INFO] [stdout]     |                              ^^^^^^^^ not found in `crossbeam_channel`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 48  | use core::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 48  | use crate::oneshot::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 48  | use std::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 48  | use std::sync::mpsc::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `unbounded` in crate `crossbeam_channel`
[INFO] [stdout]    --> src/lib.rs:178:51
[INFO] [stdout]     |
[INFO] [stdout] 178 |             let (send, recv) = crossbeam_channel::unbounded();
[INFO] [stdout]     |                                                   ^^^^^^^^^ not found in `crossbeam_channel`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Sender` in crate `crossbeam_channel`
[INFO] [stdout]    --> src/lib.rs:121:30
[INFO] [stdout]     |
[INFO] [stdout] 121 |     send: crossbeam_channel::Sender<Message>,
[INFO] [stdout]     |                              ^^^^^^ not found in `crossbeam_channel`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 48  | use crate::oneshot::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 48  | use std::sync::mpsc::Sender;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `Receiver` in crate `crossbeam_channel`
[INFO] [stdout]    --> src/lib.rs:122:30
[INFO] [stdout]     |
[INFO] [stdout] 122 |     recv: crossbeam_channel::Receiver<Message>,
[INFO] [stdout]     |                              ^^^^^^^^ not found in `crossbeam_channel`
[INFO] [stdout]     |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]     |
[INFO] [stdout] 48  | use core::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 48  | use crate::oneshot::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 48  | use std::ops::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 48  | use std::sync::mpsc::Receiver;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `unbounded` in crate `crossbeam_channel`
[INFO] [stdout]    --> src/lib.rs:178:51
[INFO] [stdout]     |
[INFO] [stdout] 178 |             let (send, recv) = crossbeam_channel::unbounded();
[INFO] [stdout]     |                                                   ^^^^^^^^^ not found in `crossbeam_channel`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0425.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `slave-pool`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0425.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "44d3b23390714b30a6559a15c855b9bd14315d423e84f5adbf0c94331e952fb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44d3b23390714b30a6559a15c855b9bd14315d423e84f5adbf0c94331e952fb7", kill_on_drop: false }`
[INFO] [stdout] 44d3b23390714b30a6559a15c855b9bd14315d423e84f5adbf0c94331e952fb7