[INFO] fetching crate fclones 0.34.0...
[INFO] checking fclones-0.34.0 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate fclones 0.34.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate fclones 0.34.0 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 fclones 0.34.0
[INFO] finished tweaking crates.io crate fclones 0.34.0
[INFO] tweaked toml for crates.io crate fclones 0.34.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate fclones 0.34.0 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] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 2545b197b4e930510ecdd3a3f72cdb218a9535dc51e2a192bf71a3a4d07c0baa
[INFO] running `Command { std: "docker" "start" "-a" "2545b197b4e930510ecdd3a3f72cdb218a9535dc51e2a192bf71a3a4d07c0baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2545b197b4e930510ecdd3a3f72cdb218a9535dc51e2a192bf71a3a4d07c0baa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2545b197b4e930510ecdd3a3f72cdb218a9535dc51e2a192bf71a3a4d07c0baa", kill_on_drop: false }`
[INFO] [stdout] 2545b197b4e930510ecdd3a3f72cdb218a9535dc51e2a192bf71a3a4d07c0baa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 47412ce8a91dfa54d77715970cc888e9f728e36ef5a9232f7dfb004f027d0130
[INFO] running `Command { std: "docker" "start" "-a" "47412ce8a91dfa54d77715970cc888e9f728e36ef5a9232f7dfb004f027d0130", kill_on_drop: false }`
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[INFO] [stdout] warning: method `as_file_hash` is never used
[INFO] [stdout]    --> src/file.rs:454:8
[INFO] [stdout]     |
[INFO] [stdout] 453 | pub trait AsFileHash {
[INFO] [stdout]     |           ---------- method in this trait
[INFO] [stdout] 454 |     fn as_file_hash(&self) -> &FileHash;
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `total_size` is never used
[INFO] [stdout]    --> src/file.rs:542:8
[INFO] [stdout]     |
[INFO] [stdout] 538 | pub(crate) trait FileCollection {
[INFO] [stdout]     |                  -------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 542 |     fn total_size(&self) -> FileLen;
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `as_file_hash` is never used
[INFO] [stdout]    --> src/file.rs:454:8
[INFO] [stdout]     |
[INFO] [stdout] 453 | pub trait AsFileHash {
[INFO] [stdout]     |           ---------- method in this trait
[INFO] [stdout] 454 |     fn as_file_hash(&self) -> &FileHash;
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `total_size` is never used
[INFO] [stdout]    --> src/file.rs:542:8
[INFO] [stdout]     |
[INFO] [stdout] 538 | pub(crate) trait FileCollection {
[INFO] [stdout]     |                  -------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 542 |     fn total_size(&self) -> FileLen;
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/reflink.rs:357:34
[INFO] [stdout]     |
[INFO] [stdout] 357 |         pub struct CrossTest<'a>(MutexGuard<'a, ()>);
[INFO] [stdout]     |                    ---------     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.15s
[INFO] running `Command { std: "docker" "inspect" "47412ce8a91dfa54d77715970cc888e9f728e36ef5a9232f7dfb004f027d0130", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47412ce8a91dfa54d77715970cc888e9f728e36ef5a9232f7dfb004f027d0130", kill_on_drop: false }`
[INFO] [stdout] 47412ce8a91dfa54d77715970cc888e9f728e36ef5a9232f7dfb004f027d0130