[INFO] fetching crate width_counters 2.0.2...
[INFO] checking width_counters-2.0.2 against master#8a703520e80d87d4423c01f9d4fbc9e5f6533a02 for pr-154205-1
[INFO] extracting crate width_counters 2.0.2 into /workspace/builds/worker-4-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-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate width_counters 2.0.2 on toolchain 8a703520e80d87d4423c01f9d4fbc9e5f6533a02
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 18 packages to latest compatible versions
[INFO] [stderr]       Adding ron v0.8.1 (available: v0.12.0)
[INFO] [stderr]       Adding strum v0.24.1 (available: v0.28.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea648a730a3c488b3a8dcc8f4e046a528151cf5c245fe957aef920d5877b6030
[INFO] running `Command { std: "docker" "start" "-a" "ea648a730a3c488b3a8dcc8f4e046a528151cf5c245fe957aef920d5877b6030", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea648a730a3c488b3a8dcc8f4e046a528151cf5c245fe957aef920d5877b6030", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea648a730a3c488b3a8dcc8f4e046a528151cf5c245fe957aef920d5877b6030", kill_on_drop: false }`
[INFO] [stdout] ea648a730a3c488b3a8dcc8f4e046a528151cf5c245fe957aef920d5877b6030
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 62fec79bc5ecdb8409591e1c3ce5091a61e67477214d6abef4078fc9dbbf5d45
[INFO] running `Command { std: "docker" "start" "-a" "62fec79bc5ecdb8409591e1c3ce5091a61e67477214d6abef4078fc9dbbf5d45", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling enumflags2_derive v0.7.12
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]     Checking enumflags2 v0.7.12
[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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.95s
[INFO] running `Command { std: "docker" "inspect" "62fec79bc5ecdb8409591e1c3ce5091a61e67477214d6abef4078fc9dbbf5d45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62fec79bc5ecdb8409591e1c3ce5091a61e67477214d6abef4078fc9dbbf5d45", kill_on_drop: false }`
[INFO] [stdout] 62fec79bc5ecdb8409591e1c3ce5091a61e67477214d6abef4078fc9dbbf5d45