[INFO] cloning repository https://github.com/zanesterling/shedspreet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zanesterling/shedspreet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzanesterling%2Fshedspreet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzanesterling%2Fshedspreet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 935d9e44d2d6c4eed0cb7c0f603fdc4e867a9eef
[INFO] checking zanesterling/shedspreet against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzanesterling%2Fshedspreet" "/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/zanesterling/shedspreet 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 git repo https://github.com/zanesterling/shedspreet
[INFO] finished tweaking git repo https://github.com/zanesterling/shedspreet
[INFO] tweaked toml for git repo https://github.com/zanesterling/shedspreet written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zanesterling/shedspreet 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3d9d97f8600a501090eb95efc89ad0ca3585752fdf6670aa047ba8ec153cbc4
[INFO] running `Command { std: "docker" "start" "-a" "c3d9d97f8600a501090eb95efc89ad0ca3585752fdf6670aa047ba8ec153cbc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3d9d97f8600a501090eb95efc89ad0ca3585752fdf6670aa047ba8ec153cbc4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3d9d97f8600a501090eb95efc89ad0ca3585752fdf6670aa047ba8ec153cbc4", kill_on_drop: false }`
[INFO] [stdout] c3d9d97f8600a501090eb95efc89ad0ca3585752fdf6670aa047ba8ec153cbc4
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c59643f4195a887fb7f6513fdf5b7827c758ed93ba3898a6fa8fdf3114a7c395
[INFO] running `Command { std: "docker" "start" "-a" "c59643f4195a887fb7f6513fdf5b7827c758ed93ba3898a6fa8fdf3114a7c395", kill_on_drop: false }`
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking spreadsheet v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `backrefs` is never read
[INFO] [stdout]    --> src/engine.rs:129:5
[INFO] [stdout]     |
[INFO] [stdout] 127 | struct Cell {
[INFO] [stdout]     |        ---- field in this struct
[INFO] [stdout] 128 |     contents: String,
[INFO] [stdout] 129 |     backrefs: Vec<CellRef>,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Cell` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]    --> src/engine.rs:143:16
[INFO] [stdout]     |
[INFO] [stdout] 143 | struct CellRef(usize, usize);
[INFO] [stdout]     |        ------- ^^^^^  ^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        fields in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing these fields
[INFO] [stdout]     = note: `CellRef` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/engine.rs:326:22
[INFO] [stdout]     |
[INFO] [stdout] 326 |     DescriptiveError(String),
[INFO] [stdout]     |     ---------------- ^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Error` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 326 |     DescriptiveError(()),
[INFO] [stdout]     |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `backrefs` is never read
[INFO] [stdout]    --> src/engine.rs:129:5
[INFO] [stdout]     |
[INFO] [stdout] 127 | struct Cell {
[INFO] [stdout]     |        ---- field in this struct
[INFO] [stdout] 128 |     contents: String,
[INFO] [stdout] 129 |     backrefs: Vec<CellRef>,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Cell` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]    --> src/engine.rs:143:16
[INFO] [stdout]     |
[INFO] [stdout] 143 | struct CellRef(usize, usize);
[INFO] [stdout]     |        ------- ^^^^^  ^^^^^
[INFO] [stdout]     |        |
[INFO] [stdout]     |        fields in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing these fields
[INFO] [stdout]     = note: `CellRef` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/engine.rs:326:22
[INFO] [stdout]     |
[INFO] [stdout] 326 |     DescriptiveError(String),
[INFO] [stdout]     |     ---------------- ^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Error` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 326 |     DescriptiveError(()),
[INFO] [stdout]     |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "c59643f4195a887fb7f6513fdf5b7827c758ed93ba3898a6fa8fdf3114a7c395", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c59643f4195a887fb7f6513fdf5b7827c758ed93ba3898a6fa8fdf3114a7c395", kill_on_drop: false }`
[INFO] [stdout] c59643f4195a887fb7f6513fdf5b7827c758ed93ba3898a6fa8fdf3114a7c395