[INFO] fetching crate generic-cursors 0.0.3...
[INFO] checking generic-cursors-0.0.3 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate generic-cursors 0.0.3 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate generic-cursors 0.0.3 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate generic-cursors 0.0.3
[INFO] finished tweaking crates.io crate generic-cursors 0.0.3
[INFO] tweaked toml for crates.io crate generic-cursors 0.0.3 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate generic-cursors 0.0.3 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ec031c41c04a71149ffd14dffdfc9db7b2ae53a3ac111a289530ae69a00c720e
[INFO] running `Command { std: "docker" "start" "-a" "ec031c41c04a71149ffd14dffdfc9db7b2ae53a3ac111a289530ae69a00c720e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ec031c41c04a71149ffd14dffdfc9db7b2ae53a3ac111a289530ae69a00c720e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec031c41c04a71149ffd14dffdfc9db7b2ae53a3ac111a289530ae69a00c720e", kill_on_drop: false }`
[INFO] [stdout] ec031c41c04a71149ffd14dffdfc9db7b2ae53a3ac111a289530ae69a00c720e
[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 -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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7934d71f1f4e97dd56033f8a9d7a131457745fe6867d1c4ead3b4d68c815fed7
[INFO] running `Command { std: "docker" "start" "-a" "7934d71f1f4e97dd56033f8a9d7a131457745fe6867d1c4ead3b4d68c815fed7", kill_on_drop: false }`
[INFO] [stderr]     Checking generic-cursors v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `insert_next` is never used
[INFO] [stdout]   --> examples/cyclic_sync.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<T> CyclicDataStructure<T> {
[INFO] [stdout]    | ------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 15 |     fn insert_next(&mut self, new_next: Arc<Mutex<Self>>) -> Option<Arc<Mutex<Self>>> {
[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 0.46s
[INFO] running `Command { std: "docker" "inspect" "7934d71f1f4e97dd56033f8a9d7a131457745fe6867d1c4ead3b4d68c815fed7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7934d71f1f4e97dd56033f8a9d7a131457745fe6867d1c4ead3b4d68c815fed7", kill_on_drop: false }`
[INFO] [stdout] 7934d71f1f4e97dd56033f8a9d7a131457745fe6867d1c4ead3b4d68c815fed7