[INFO] fetching crate batt 0.1.0...
[INFO] checking batt-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate batt 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate batt 0.1.0 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 crates.io crate batt 0.1.0
[INFO] finished tweaking crates.io crate batt 0.1.0
[INFO] tweaked toml for crates.io crate batt 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate batt 0.1.0 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded utf8-ranges v1.0.4
[INFO] [stderr]   Downloaded logos-derive v0.11.3
[INFO] [stderr]   Downloaded fnv v1.0.6
[INFO] [stderr]   Downloaded quote v1.0.3
[INFO] [stderr]   Downloaded unicode-xid v0.2.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.10
[INFO] [stderr]   Downloaded beef v0.4.3
[INFO] [stderr]   Downloaded colored v1.9.3
[INFO] [stderr]   Downloaded hermit-abi v0.1.11
[INFO] [stderr]   Downloaded logos v0.11.1
[INFO] [stderr]   Downloaded syn v1.0.18
[INFO] [stderr]   Downloaded regex-syntax v0.6.17
[INFO] [stderr]   Downloaded libc v0.2.69
[INFO] [stderr]   Downloaded winapi v0.3.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 0e7bf9f6468cdb85a78c9b1006e0449cca744bda04078e0ec7a7b119915d29d8
[INFO] running `Command { std: "docker" "start" "-a" "0e7bf9f6468cdb85a78c9b1006e0449cca744bda04078e0ec7a7b119915d29d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e7bf9f6468cdb85a78c9b1006e0449cca744bda04078e0ec7a7b119915d29d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e7bf9f6468cdb85a78c9b1006e0449cca744bda04078e0ec7a7b119915d29d8", kill_on_drop: false }`
[INFO] [stdout] 0e7bf9f6468cdb85a78c9b1006e0449cca744bda04078e0ec7a7b119915d29d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 24f0c3004fcf0e953f70250056c5f46696ea01f31e20ffa3e484c1c3e45f943c
[INFO] running `Command { std: "docker" "start" "-a" "24f0c3004fcf0e953f70250056c5f46696ea01f31e20ffa3e484c1c3e45f943c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling beef v0.4.3
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]    Compiling logos-derive v0.11.3
[INFO] [stderr]     Checking logos v0.11.1
[INFO] [stderr]     Checking batt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `set_bit`, `clear_bit`, `toggle_bit`, and `clear_string` are never used
[INFO] [stdout]   --> src/bitstring_trait.rs:8:8
[INFO] [stdout]    |
[INFO] [stdout] 2  | pub trait BitString {
[INFO] [stdout]    |           --------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 8  |     fn set_bit(&mut self, pos: usize) -> bool;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     fn clear_bit(&mut self, pos: usize) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn toggle_bit(&mut self, pos: usize) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn clear_string(&mut self);
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `set_bit`, `clear_bit`, `toggle_bit`, and `clear_string` are never used
[INFO] [stdout]   --> src/bitstring_trait.rs:8:8
[INFO] [stdout]    |
[INFO] [stdout] 2  | pub trait BitString {
[INFO] [stdout]    |           --------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 8  |     fn set_bit(&mut self, pos: usize) -> bool;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     fn clear_bit(&mut self, pos: usize) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn toggle_bit(&mut self, pos: usize) -> bool;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn clear_string(&mut self);
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.90s
[INFO] running `Command { std: "docker" "inspect" "24f0c3004fcf0e953f70250056c5f46696ea01f31e20ffa3e484c1c3e45f943c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24f0c3004fcf0e953f70250056c5f46696ea01f31e20ffa3e484c1c3e45f943c", kill_on_drop: false }`
[INFO] [stdout] 24f0c3004fcf0e953f70250056c5f46696ea01f31e20ffa3e484c1c3e45f943c