[INFO] fetching crate width_counters 2.0.2...
[INFO] building width_counters-2.0.2 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate width_counters 2.0.2 into /workspace/builds/worker-2-tc2/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-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate width_counters 2.0.2 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 18 packages to latest compatible versions
[INFO] [stderr]       Adding ron v0.8.1 (available: v0.11.0)
[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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e03f6d70d58069e14a5c9049298a8792a2cb48fb023f8f486dc9670e72fcf353
[INFO] running `Command { std: "docker" "start" "-a" "e03f6d70d58069e14a5c9049298a8792a2cb48fb023f8f486dc9670e72fcf353", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e03f6d70d58069e14a5c9049298a8792a2cb48fb023f8f486dc9670e72fcf353", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e03f6d70d58069e14a5c9049298a8792a2cb48fb023f8f486dc9670e72fcf353", kill_on_drop: false }`
[INFO] [stdout] e03f6d70d58069e14a5c9049298a8792a2cb48fb023f8f486dc9670e72fcf353
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec53ffae8aeb693f0af9aa4678b7312d010ed1b82168441e21fd419b2d656d25
[INFO] running `Command { std: "docker" "start" "-a" "ec53ffae8aeb693f0af9aa4678b7312d010ed1b82168441e21fd419b2d656d25", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling rustversion v1.0.22
[INFO] [stderr]    Compiling enumflags2_derive v0.7.12
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]    Compiling enumflags2 v0.7.12
[INFO] [stderr]    Compiling strum v0.24.1
[INFO] [stderr]    Compiling 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.87s
[INFO] running `Command { std: "docker" "inspect" "ec53ffae8aeb693f0af9aa4678b7312d010ed1b82168441e21fd419b2d656d25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec53ffae8aeb693f0af9aa4678b7312d010ed1b82168441e21fd419b2d656d25", kill_on_drop: false }`
[INFO] [stdout] ec53ffae8aeb693f0af9aa4678b7312d010ed1b82168441e21fd419b2d656d25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56730a8e04211811c291471ed60cf91d78647aa6e794ecbfa665bfdd2c613c54
[INFO] running `Command { std: "docker" "start" "-a" "56730a8e04211811c291471ed60cf91d78647aa6e794ecbfa665bfdd2c613c54", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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 `test` profile [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "56730a8e04211811c291471ed60cf91d78647aa6e794ecbfa665bfdd2c613c54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56730a8e04211811c291471ed60cf91d78647aa6e794ecbfa665bfdd2c613c54", kill_on_drop: false }`
[INFO] [stdout] 56730a8e04211811c291471ed60cf91d78647aa6e794ecbfa665bfdd2c613c54