[INFO] cloning repository https://github.com/wl-stepp/img_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wl-stepp/img_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwl-stepp%2Fimg_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwl-stepp%2Fimg_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ed9f7c66adfac036a95981e2f31f9983646a3c48
[INFO] checking wl-stepp/img_rust against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwl-stepp%2Fimg_rust" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wl-stepp/img_rust on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wl-stepp/img_rust
[INFO] finished tweaking git repo https://github.com/wl-stepp/img_rust
[INFO] tweaked toml for git repo https://github.com/wl-stepp/img_rust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/wl-stepp/img_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded target-lexicon v0.12.9
[INFO] [stderr]   Downloaded pyo3-macros v0.19.1
[INFO] [stderr]   Downloaded pyo3-build-config v0.19.1
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.19.1
[INFO] [stderr]   Downloaded pyo3-ffi v0.19.1
[INFO] [stderr]   Downloaded pyo3 v0.19.1
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aebee518389a2d9144f91867117668be65f413482adbede06f0140f210fcc247
[INFO] running `Command { std: "docker" "start" "-a" "aebee518389a2d9144f91867117668be65f413482adbede06f0140f210fcc247", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aebee518389a2d9144f91867117668be65f413482adbede06f0140f210fcc247", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aebee518389a2d9144f91867117668be65f413482adbede06f0140f210fcc247", kill_on_drop: false }`
[INFO] [stdout] aebee518389a2d9144f91867117668be65f413482adbede06f0140f210fcc247
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 96dca93d50431b4c9ff6befaee96cf5aded037d09abf5f7798b4fc6d4e78fff8
[INFO] running `Command { std: "docker" "start" "-a" "96dca93d50431b4c9ff6befaee96cf5aded037d09abf5f7798b4fc6d4e78fff8", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.12.9
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling matrixmultiply v0.3.7
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]     Checking unindent v0.1.11
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]    Compiling pyo3-build-config v0.19.1
[INFO] [stderr]     Checking rayon-core v1.11.0
[INFO] [stderr]    Compiling quote v1.0.31
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking num-complex v0.4.3
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]    Compiling pyo3-ffi v0.19.1
[INFO] [stderr]    Compiling pyo3 v0.19.1
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]    Compiling pyo3-macros-backend v0.19.1
[INFO] [stderr]    Compiling pyo3-macros v0.19.1
[INFO] [stderr]     Checking numpy v0.19.0
[INFO] [stderr]     Checking img_rust v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Python` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use pyo3::prelude::*;
[INFO] [stdout]   |     ---------------- the item `Python` is already imported here
[INFO] [stdout] 5 | use pyo3::wrap_pyfunction;
[INFO] [stdout] 6 | use pyo3::Python;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Python` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use pyo3::prelude::*;
[INFO] [stdout]   |     ---------------- the item `Python` is already imported here
[INFO] [stdout] 5 | use pyo3::wrap_pyfunction;
[INFO] [stdout] 6 | use pyo3::Python;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 29.13s
[INFO] running `Command { std: "docker" "inspect" "96dca93d50431b4c9ff6befaee96cf5aded037d09abf5f7798b4fc6d4e78fff8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96dca93d50431b4c9ff6befaee96cf5aded037d09abf5f7798b4fc6d4e78fff8", kill_on_drop: false }`
[INFO] [stdout] 96dca93d50431b4c9ff6befaee96cf5aded037d09abf5f7798b4fc6d4e78fff8
[INFO] checking wl-stepp/img_rust against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwl-stepp%2Fimg_rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wl-stepp/img_rust on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wl-stepp/img_rust
[INFO] finished tweaking git repo https://github.com/wl-stepp/img_rust
[INFO] tweaked toml for git repo https://github.com/wl-stepp/img_rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/wl-stepp/img_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 335ac9cdca85ca22b191e07f1888a41b44624362a344db8d9bbb160405ca7441
[INFO] running `Command { std: "docker" "start" "-a" "335ac9cdca85ca22b191e07f1888a41b44624362a344db8d9bbb160405ca7441", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "335ac9cdca85ca22b191e07f1888a41b44624362a344db8d9bbb160405ca7441", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "335ac9cdca85ca22b191e07f1888a41b44624362a344db8d9bbb160405ca7441", kill_on_drop: false }`
[INFO] [stdout] 335ac9cdca85ca22b191e07f1888a41b44624362a344db8d9bbb160405ca7441
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fabed7719a084c2a2cf02912cc3e877ea8d27fb9c78c0365af6bd3b25aa49461
[INFO] running `Command { std: "docker" "start" "-a" "fabed7719a084c2a2cf02912cc3e877ea8d27fb9c78c0365af6bd3b25aa49461", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-lexicon v0.12.9
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling matrixmultiply v0.3.7
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking unindent v0.1.11
[INFO] [stderr]    Compiling indoc v1.0.9
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stderr]     Checking rayon-core v1.11.0
[INFO] [stderr]    Compiling pyo3-build-config v0.19.1
[INFO] [stderr]    Compiling quote v1.0.31
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking num-complex v0.4.3
[INFO] [stderr]    Compiling pyo3-ffi v0.19.1
[INFO] [stderr]    Compiling pyo3 v0.19.1
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]    Compiling pyo3-macros-backend v0.19.1
[INFO] [stderr]    Compiling pyo3-macros v0.19.1
[INFO] [stderr]     Checking numpy v0.19.0
[INFO] [stderr]     Checking img_rust v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Python` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use pyo3::prelude::*;
[INFO] [stdout]   |     ---------------- the item `Python` is already imported here
[INFO] [stdout] 5 | use pyo3::wrap_pyfunction;
[INFO] [stdout] 6 | use pyo3::Python;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Python` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use pyo3::prelude::*;
[INFO] [stdout]   |     ---------------- the item `Python` is already imported here
[INFO] [stdout] 5 | use pyo3::wrap_pyfunction;
[INFO] [stdout] 6 | use pyo3::Python;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.39s
[INFO] running `Command { std: "docker" "inspect" "fabed7719a084c2a2cf02912cc3e877ea8d27fb9c78c0365af6bd3b25aa49461", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fabed7719a084c2a2cf02912cc3e877ea8d27fb9c78c0365af6bd3b25aa49461", kill_on_drop: false }`
[INFO] [stdout] fabed7719a084c2a2cf02912cc3e877ea8d27fb9c78c0365af6bd3b25aa49461