[INFO] fetching crate mutf8 0.5.0...
[INFO] checking mutf8-0.5.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate mutf8 0.5.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate mutf8 0.5.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mutf8 0.5.0
[INFO] finished tweaking crates.io crate mutf8 0.5.0
[INFO] tweaked toml for crates.io crate mutf8 0.5.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5937efea156a8878121d6e48c6652fd7bd06eacb45a99bf8627434fd2cc89e09
[INFO] running `Command { std: "docker" "start" "-a" "5937efea156a8878121d6e48c6652fd7bd06eacb45a99bf8627434fd2cc89e09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5937efea156a8878121d6e48c6652fd7bd06eacb45a99bf8627434fd2cc89e09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5937efea156a8878121d6e48c6652fd7bd06eacb45a99bf8627434fd2cc89e09", kill_on_drop: false }`
[INFO] [stdout] 5937efea156a8878121d6e48c6652fd7bd06eacb45a99bf8627434fd2cc89e09
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6438867811f97f23a66c23160b33aed952304be09cddcdaa6bf1fb838aecf16e
[INFO] running `Command { std: "docker" "start" "-a" "6438867811f97f23a66c23160b33aed952304be09cddcdaa6bf1fb838aecf16e", kill_on_drop: false }`
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking mutf8 v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking serde_json v1.0.72
[INFO] [stdout] warning: unused import: `mutf8::mutf8_to_utf8`
[INFO] [stdout]  --> tests/to_mutf8.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use mutf8::mutf8_to_utf8;
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.32s
[INFO] running `Command { std: "docker" "inspect" "6438867811f97f23a66c23160b33aed952304be09cddcdaa6bf1fb838aecf16e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6438867811f97f23a66c23160b33aed952304be09cddcdaa6bf1fb838aecf16e", kill_on_drop: false }`
[INFO] [stdout] 6438867811f97f23a66c23160b33aed952304be09cddcdaa6bf1fb838aecf16e