[INFO] fetching crate stability 0.2.1...
[INFO] checking stability-0.2.1 against try#0c7fed2b7584d310ca8221267fa1b3bec4df427f for pr-133502-4
[INFO] extracting crate stability 0.2.1 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate stability 0.2.1 on toolchain 0c7fed2b7584d310ca8221267fa1b3bec4df427f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stability 0.2.1
[INFO] finished tweaking crates.io crate stability 0.2.1
[INFO] tweaked toml for crates.io crate stability 0.2.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4781586dbe4dc06ffe0b269e49c8188b8b4382b31967999e5ac16a409ff3d45a
[INFO] running `Command { std: "docker" "start" "-a" "4781586dbe4dc06ffe0b269e49c8188b8b4382b31967999e5ac16a409ff3d45a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4781586dbe4dc06ffe0b269e49c8188b8b4382b31967999e5ac16a409ff3d45a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4781586dbe4dc06ffe0b269e49c8188b8b4382b31967999e5ac16a409ff3d45a", kill_on_drop: false }`
[INFO] [stdout] 4781586dbe4dc06ffe0b269e49c8188b8b4382b31967999e5ac16a409ff3d45a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+0c7fed2b7584d310ca8221267fa1b3bec4df427f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b7e73aaa3d8a9453fdaf5c42aedb9f1b0c369da40fb6ac3913a9c507b0bdd457
[INFO] running `Command { std: "docker" "start" "-a" "b7e73aaa3d8a9453fdaf5c42aedb9f1b0c369da40fb6ac3913a9c507b0bdd457", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking syn v2.0.100
[INFO] [stderr]     Checking stability v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `attrs` is never used
[INFO] [stdout]   --> src/unstable.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub(crate) trait ItemLike {
[INFO] [stdout]    |                  -------- method in this trait
[INFO] [stdout] 94 |     fn attrs(&self) -> &[syn::Attribute];
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `attrs` is never used
[INFO] [stdout]   --> src/unstable.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub(crate) trait ItemLike {
[INFO] [stdout]    |                  -------- method in this trait
[INFO] [stdout] 94 |     fn attrs(&self) -> &[syn::Attribute];
[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 6.52s
[INFO] running `Command { std: "docker" "inspect" "b7e73aaa3d8a9453fdaf5c42aedb9f1b0c369da40fb6ac3913a9c507b0bdd457", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7e73aaa3d8a9453fdaf5c42aedb9f1b0c369da40fb6ac3913a9c507b0bdd457", kill_on_drop: false }`
[INFO] [stdout] b7e73aaa3d8a9453fdaf5c42aedb9f1b0c369da40fb6ac3913a9c507b0bdd457