[INFO] fetching crate buttons 0.6.0...
[INFO] checking buttons-0.6.0 against try#a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399 for pr-145770
[INFO] extracting crate buttons 0.6.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate buttons 0.6.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate buttons 0.6.0
[INFO] tweaked toml for crates.io crate buttons 0.6.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate buttons 0.6.0 on toolchain a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate buttons 0.6.0 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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea4bced28ab60112fb23b89529815cdaaeb187d986e28102e986489833914597
[INFO] running `Command { std: "docker" "start" "-a" "ea4bced28ab60112fb23b89529815cdaaeb187d986e28102e986489833914597", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea4bced28ab60112fb23b89529815cdaaeb187d986e28102e986489833914597", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea4bced28ab60112fb23b89529815cdaaeb187d986e28102e986489833914597", kill_on_drop: false }`
[INFO] [stdout] ea4bced28ab60112fb23b89529815cdaaeb187d986e28102e986489833914597
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 64674ebf5c875e4e8d3804e98d09e7abc703ad410b41eb9230c1cabc262e7ec1
[INFO] running `Command { std: "docker" "start" "-a" "64674ebf5c875e4e8d3804e98d09e7abc703ad410b41eb9230c1cabc262e7ec1", kill_on_drop: false }`
[INFO] [stderr]     Checking smol_str v0.3.2
[INFO] [stderr]     Checking smallvec v1.14.0
[INFO] [stderr]     Checking buttons v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Modifiers` is never constructed
[INFO] [stdout]   --> src/keyboard.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub struct Modifiers {
[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 0.68s
[INFO] running `Command { std: "docker" "inspect" "64674ebf5c875e4e8d3804e98d09e7abc703ad410b41eb9230c1cabc262e7ec1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64674ebf5c875e4e8d3804e98d09e7abc703ad410b41eb9230c1cabc262e7ec1", kill_on_drop: false }`
[INFO] [stdout] 64674ebf5c875e4e8d3804e98d09e7abc703ad410b41eb9230c1cabc262e7ec1
