[INFO] fetching crate observatory 0.1.7...
[INFO] checking observatory-0.1.7 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate observatory 0.1.7 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate observatory 0.1.7 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 crates.io crate observatory 0.1.7
[INFO] finished tweaking crates.io crate observatory 0.1.7
[INFO] tweaked toml for crates.io crate observatory 0.1.7 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 4fc9bf40e4efbcab01b6385e42e862c89db77f86ad73fe21be47c40697bed860
[INFO] running `Command { std: "docker" "start" "-a" "4fc9bf40e4efbcab01b6385e42e862c89db77f86ad73fe21be47c40697bed860", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4fc9bf40e4efbcab01b6385e42e862c89db77f86ad73fe21be47c40697bed860", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fc9bf40e4efbcab01b6385e42e862c89db77f86ad73fe21be47c40697bed860", kill_on_drop: false }`
[INFO] [stdout] 4fc9bf40e4efbcab01b6385e42e862c89db77f86ad73fe21be47c40697bed860
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] dc14b024566e295078f08cf21b59490f31b9c17297c8ba776064093ea47c294e
[INFO] running `Command { std: "docker" "start" "-a" "dc14b024566e295078f08cf21b59490f31b9c17297c8ba776064093ea47c294e", kill_on_drop: false }`
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking crossbeam-channel v0.5.13
[INFO] [stderr]     Checking crossbeam-queue v0.3.11
[INFO] [stderr]     Checking crossbeam v0.8.4
[INFO] [stderr]     Checking observatory v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `arc_new_cyclic` has been stable since 1.60.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(arc_new_cyclic)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `arc_new_cyclic` has been stable since 1.60.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(arc_new_cyclic)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_unique_data_address` is never used
[INFO] [stdout]   --> src/observer.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub(crate) trait ObserverInternalFns {
[INFO] [stdout]    |                  ------------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn get_unique_data_address(&self) -> *const ();
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_unique_data_address` is never used
[INFO] [stdout]   --> src/observer.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub(crate) trait ObserverInternalFns {
[INFO] [stdout]    |                  ------------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 23 |     fn get_unique_data_address(&self) -> *const ();
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `Command { std: "docker" "inspect" "dc14b024566e295078f08cf21b59490f31b9c17297c8ba776064093ea47c294e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc14b024566e295078f08cf21b59490f31b9c17297c8ba776064093ea47c294e", kill_on_drop: false }`
[INFO] [stdout] dc14b024566e295078f08cf21b59490f31b9c17297c8ba776064093ea47c294e