[INFO] cloning repository https://github.com/GT-GillesTeuwen/generic-observer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/GT-GillesTeuwen/generic-observer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGT-GillesTeuwen%2Fgeneric-observer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGT-GillesTeuwen%2Fgeneric-observer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a3b623b34716cf82035774f1bfd0709b76cf86b6
[INFO] checking GT-GillesTeuwen/generic-observer/a3b623b34716cf82035774f1bfd0709b76cf86b6 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGT-GillesTeuwen%2Fgeneric-observer" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/GT-GillesTeuwen/generic-observer on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/GT-GillesTeuwen/generic-observer
[INFO] finished tweaking git repo https://github.com/GT-GillesTeuwen/generic-observer
[INFO] tweaked toml for git repo https://github.com/GT-GillesTeuwen/generic-observer written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/GT-GillesTeuwen/generic-observer 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.path
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d491490630927a70315dfed7685a657444e7edf63b29ddb682ffc8479d734a8a
[INFO] running `Command { std: "docker" "start" "-a" "d491490630927a70315dfed7685a657444e7edf63b29ddb682ffc8479d734a8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d491490630927a70315dfed7685a657444e7edf63b29ddb682ffc8479d734a8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d491490630927a70315dfed7685a657444e7edf63b29ddb682ffc8479d734a8a", kill_on_drop: false }`
[INFO] [stdout] d491490630927a70315dfed7685a657444e7edf63b29ddb682ffc8479d734a8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7ac37d9281eb9064b58eceb455c46aaa75a669226d39d15e10a703f672841b09
[INFO] running `Command { std: "docker" "start" "-a" "7ac37d9281eb9064b58eceb455c46aaa75a669226d39d15e10a703f672841b09", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.path
[INFO] [stderr]    Compiling proc-macro2 v1.0.84
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.66
[INFO] [stderr]    Compiling generic-observer-macros v0.1.0 (/opt/rustwide/workdir/generic-observer-macros)
[INFO] [stderr]     Checking main v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `notify` is never used
[INFO] [stdout]   --> src/gof_observer.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub trait Subject<T> {
[INFO] [stdout]    |           ------- method in this trait
[INFO] [stdout] 36 |     fn notify(&self, event: &T);
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `notify` is never used
[INFO] [stdout]   --> src/gof_observer.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub trait Subject<T> {
[INFO] [stdout]    |           ------- method in this trait
[INFO] [stdout] 36 |     fn notify(&self, event: &T);
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.62s
[INFO] running `Command { std: "docker" "inspect" "7ac37d9281eb9064b58eceb455c46aaa75a669226d39d15e10a703f672841b09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ac37d9281eb9064b58eceb455c46aaa75a669226d39d15e10a703f672841b09", kill_on_drop: false }`
[INFO] [stdout] 7ac37d9281eb9064b58eceb455c46aaa75a669226d39d15e10a703f672841b09