[INFO] fetching crate flatty-io 0.1.0-rc.6...
[INFO] checking flatty-io-0.1.0-rc.6 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate flatty-io 0.1.0-rc.6 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate flatty-io 0.1.0-rc.6
[INFO] finished tweaking crates.io crate flatty-io 0.1.0-rc.6
[INFO] tweaked toml for crates.io crate flatty-io 0.1.0-rc.6 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate flatty-io 0.1.0-rc.6 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 95 packages to latest compatible versions
[INFO] [stderr]       Adding async-ringbuf v0.2.1 (available: v0.3.4)
[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 flatty v0.1.0-rc.4
[INFO] [stderr]   Downloaded flatty-macros v0.1.0-rc.4
[INFO] [stderr]   Downloaded flatty-base v0.1.0-rc.4
[INFO] [stderr]   Downloaded stavec v0.3.0
[INFO] [stderr]   Downloaded ringbuf-blocking v0.1.0-rc.5
[INFO] [stderr]   Downloaded flatty-portable v0.1.0-rc.4
[INFO] [stderr]   Downloaded ringbuf v0.4.8
[INFO] [stderr]   Downloaded async-ringbuf v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d1cac639a2f7592edc17d27e1b453a282d30a9a859f1d9ea5a3675a9cd4ee4d3
[INFO] running `Command { std: "docker" "start" "-a" "d1cac639a2f7592edc17d27e1b453a282d30a9a859f1d9ea5a3675a9cd4ee4d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1cac639a2f7592edc17d27e1b453a282d30a9a859f1d9ea5a3675a9cd4ee4d3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1cac639a2f7592edc17d27e1b453a282d30a9a859f1d9ea5a3675a9cd4ee4d3", kill_on_drop: false }`
[INFO] [stdout] d1cac639a2f7592edc17d27e1b453a282d30a9a859f1d9ea5a3675a9cd4ee4d3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 6d47f572f2f8766f486fc23e632f792bc0b9e850980a32f723d69bf58297b536
[INFO] running `Command { std: "docker" "start" "-a" "6d47f572f2f8766f486fc23e632f792bc0b9e850980a32f723d69bf58297b536", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-sink v0.3.31
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking ringbuf v0.4.8
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling flatty-macros v0.1.0-rc.4
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]     Checking ringbuf-blocking v0.1.0-rc.5
[INFO] [stderr]     Checking async-std v1.13.1
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking stavec v0.3.0
[INFO] [stderr]     Checking flatty-base v0.1.0-rc.4
[INFO] [stderr]     Checking flatty-portable v0.1.0-rc.4
[INFO] [stderr]     Checking flatty v0.1.0-rc.4
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking async-ringbuf v0.2.1
[INFO] [stderr]     Checking flatty-io v0.1.0-rc.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `io::*`
[INFO] [stdout]  --> src/blocking/mod.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use io::*;
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `io::*`
[INFO] [stdout]  --> src/blocking/mod.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use io::*;
[INFO] [stdout]   |         ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.54s
[INFO] running `Command { std: "docker" "inspect" "6d47f572f2f8766f486fc23e632f792bc0b9e850980a32f723d69bf58297b536", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d47f572f2f8766f486fc23e632f792bc0b9e850980a32f723d69bf58297b536", kill_on_drop: false }`
[INFO] [stdout] 6d47f572f2f8766f486fc23e632f792bc0b9e850980a32f723d69bf58297b536