[INFO] fetching crate comtesse 0.2.3...
[INFO] checking comtesse-0.2.3 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate comtesse 0.2.3 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate comtesse 0.2.3 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate comtesse 0.2.3
[INFO] finished tweaking crates.io crate comtesse 0.2.3
[INFO] tweaked toml for crates.io crate comtesse 0.2.3 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 3 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] baff7426981b2817a8ec5cdba8afe4acd8e86abc0927e576ec31263337c8d8d9
[INFO] running `Command { std: "docker" "start" "-a" "baff7426981b2817a8ec5cdba8afe4acd8e86abc0927e576ec31263337c8d8d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "baff7426981b2817a8ec5cdba8afe4acd8e86abc0927e576ec31263337c8d8d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "baff7426981b2817a8ec5cdba8afe4acd8e86abc0927e576ec31263337c8d8d9", kill_on_drop: false }`
[INFO] [stdout] baff7426981b2817a8ec5cdba8afe4acd8e86abc0927e576ec31263337c8d8d9
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 856f82a89d0d9c3e1f68518b30a09f1c96306a4ecfbf3f97b327ceb9c869bad0
[INFO] running `Command { std: "docker" "start" "-a" "856f82a89d0d9c3e1f68518b30a09f1c96306a4ecfbf3f97b327ceb9c869bad0", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking comtesse v0.2.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `DumpGraphviz` is never used
[INFO] [stdout]   --> src/lib.rs:70:18
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub(crate) trait DumpGraphviz {
[INFO] [stdout]    |                  ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_safer` is never used
[INFO] [stdout]    --> src/lib.rs:180:15
[INFO] [stdout]     |
[INFO] [stdout] 180 | pub(crate) fn make_safer(input: &str) -> Cow<'_, str> {
[INFO] [stdout]     |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "856f82a89d0d9c3e1f68518b30a09f1c96306a4ecfbf3f97b327ceb9c869bad0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "856f82a89d0d9c3e1f68518b30a09f1c96306a4ecfbf3f97b327ceb9c869bad0", kill_on_drop: false }`
[INFO] [stdout] 856f82a89d0d9c3e1f68518b30a09f1c96306a4ecfbf3f97b327ceb9c869bad0