[INFO] fetching crate width_counters 2.0.2...
[INFO] checking width_counters-2.0.2 against master#b56aaec52bc0fa35591a872fb4aac81f606e265c for pr-122661-1
[INFO] extracting crate width_counters 2.0.2 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate width_counters 2.0.2
[INFO] finished tweaking crates.io crate width_counters 2.0.2
[INFO] tweaked toml for crates.io crate width_counters 2.0.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate width_counters 2.0.2 on toolchain b56aaec52bc0fa35591a872fb4aac81f606e265c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages to latest compatible versions
[INFO] [stderr]       Adding ron v0.8.1 (available: v0.10.1)
[INFO] [stderr]       Adding strum v0.24.1 (available: v0.27.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09f136aaca5bba3fd91e28799369d356da655f09158da0fe9544e11fa8341182
[INFO] running `Command { std: "docker" "start" "-a" "09f136aaca5bba3fd91e28799369d356da655f09158da0fe9544e11fa8341182", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09f136aaca5bba3fd91e28799369d356da655f09158da0fe9544e11fa8341182", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09f136aaca5bba3fd91e28799369d356da655f09158da0fe9544e11fa8341182", kill_on_drop: false }`
[INFO] [stdout] 09f136aaca5bba3fd91e28799369d356da655f09158da0fe9544e11fa8341182
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+b56aaec52bc0fa35591a872fb4aac81f606e265c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 051dd8a4afb4c3cef2c191fde3e50d35ab7c930403f787c4fc90275eb35e008d
[INFO] running `Command { std: "docker" "start" "-a" "051dd8a4afb4c3cef2c191fde3e50d35ab7c930403f787c4fc90275eb35e008d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling rustversion v1.0.21
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling paste v1.0.15
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling enumflags2_derive v0.7.12
[INFO] [stderr]     Checking enumflags2 v0.7.12
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]     Checking strum v0.24.1
[INFO] [stderr]     Checking width_counters v2.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `as_mut` is never used
[INFO] [stdout]   --> src/counter/mod.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub trait As<T> {
[INFO] [stdout]    |               -- method in this trait
[INFO] [stdout] 25 |         fn as_ref(&self) -> &T;
[INFO] [stdout] 26 |         fn as_mut(&mut self) -> &mut T;
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `as_mut` is never used
[INFO] [stdout]   --> src/counter/mod.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub trait As<T> {
[INFO] [stdout]    |               -- method in this trait
[INFO] [stdout] 25 |         fn as_ref(&self) -> &T;
[INFO] [stdout] 26 |         fn as_mut(&mut self) -> &mut T;
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.43s
[INFO] running `Command { std: "docker" "inspect" "051dd8a4afb4c3cef2c191fde3e50d35ab7c930403f787c4fc90275eb35e008d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "051dd8a4afb4c3cef2c191fde3e50d35ab7c930403f787c4fc90275eb35e008d", kill_on_drop: false }`
[INFO] [stdout] 051dd8a4afb4c3cef2c191fde3e50d35ab7c930403f787c4fc90275eb35e008d