[INFO] fetching crate potpourri 0.0.1...
[INFO] checking potpourri-0.0.1 against master#fc5af1813307d25a84d633f21e2e53c9376eb547 for pr-144386
[INFO] extracting crate potpourri 0.0.1 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate potpourri 0.0.1
[INFO] finished tweaking crates.io crate potpourri 0.0.1
[INFO] tweaked toml for crates.io crate potpourri 0.0.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate potpourri 0.0.1 on toolchain fc5af1813307d25a84d633f21e2e53c9376eb547
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fc5af1813307d25a84d633f21e2e53c9376eb547" "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" "+fc5af1813307d25a84d633f21e2e53c9376eb547" "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 71 packages to latest compatible versions
[INFO] [stderr]       Adding ndarray v0.15.6 (available: v0.16.1)
[INFO] [stderr]       Adding ndarray-rand v0.14.0 (available: v0.15.0)
[INFO] [stderr]       Adding ractor v0.7.6 (available: v0.15.6)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fc5af1813307d25a84d633f21e2e53c9376eb547" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ractor v0.7.6
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+fc5af1813307d25a84d633f21e2e53c9376eb547" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 450acd392018115591259c54cfb8f4c2b1090adcbc5436e8b51041c18c4f2407
[INFO] running `Command { std: "docker" "start" "-a" "450acd392018115591259c54cfb8f4c2b1090adcbc5436e8b51041c18c4f2407", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "450acd392018115591259c54cfb8f4c2b1090adcbc5436e8b51041c18c4f2407", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "450acd392018115591259c54cfb8f4c2b1090adcbc5436e8b51041c18c4f2407", kill_on_drop: false }`
[INFO] [stdout] 450acd392018115591259c54cfb8f4c2b1090adcbc5436e8b51041c18c4f2407
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+fc5af1813307d25a84d633f21e2e53c9376eb547" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7870c0abfeb04c1e7f8a0119a693378207c22c9a671773f45958e47cf6e2c9fa
[INFO] running `Command { std: "docker" "start" "-a" "7870c0abfeb04c1e7f8a0119a693378207c22c9a671773f45958e47cf6e2c9fa", kill_on_drop: false }`
[INFO] [stderr]     Checking potpourri v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lib.rs:97:23
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn fit(&mut self, data: Self::DataIn<'_>) {
[INFO] [stdout]    |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/lib.rs:101:23
[INFO] [stdout]     |
[INFO] [stdout] 101 |     fn predict(&self, data: &Self::DataIn<'_>) -> Self::DataOut {
[INFO] [stdout]     |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lib.rs:97:23
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn fit(&mut self, data: Self::DataIn<'_>) {
[INFO] [stdout]    |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/lib.rs:101:23
[INFO] [stdout]     |
[INFO] [stdout] 101 |     fn predict(&self, data: &Self::DataIn<'_>) -> Self::DataOut {
[INFO] [stdout]     |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "7870c0abfeb04c1e7f8a0119a693378207c22c9a671773f45958e47cf6e2c9fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7870c0abfeb04c1e7f8a0119a693378207c22c9a671773f45958e47cf6e2c9fa", kill_on_drop: false }`
[INFO] [stdout] 7870c0abfeb04c1e7f8a0119a693378207c22c9a671773f45958e47cf6e2c9fa