[INFO] fetching crate tari_pubsub 0.3.0...
[INFO] checking tari_pubsub-0.3.0 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate tari_pubsub 0.3.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate tari_pubsub 0.3.0 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] removed /workspace/builds/worker-5-tc2/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate tari_pubsub 0.3.0
[INFO] finished tweaking crates.io crate tari_pubsub 0.3.0
[INFO] tweaked toml for crates.io crate tari_pubsub 0.3.0 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 23 packages to latest compatible versions
[INFO] [stderr]       Adding arc-swap v0.4.8 (available: v1.7.1)
[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-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 724e2c871473d8c365a5ceb3436aface3387538b8f62eb82a210403fb7aaf4ed
[INFO] running `Command { std: "docker" "start" "-a" "724e2c871473d8c365a5ceb3436aface3387538b8f62eb82a210403fb7aaf4ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "724e2c871473d8c365a5ceb3436aface3387538b8f62eb82a210403fb7aaf4ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "724e2c871473d8c365a5ceb3436aface3387538b8f62eb82a210403fb7aaf4ed", kill_on_drop: false }`
[INFO] [stdout] 724e2c871473d8c365a5ceb3436aface3387538b8f62eb82a210403fb7aaf4ed
[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 -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] 176c1294e67d197e3339413b3abefaec52f3eec6c9cd630a5a1288b5f3dab0c2
[INFO] running `Command { std: "docker" "start" "-a" "176c1294e67d197e3339413b3abefaec52f3eec6c9cd630a5a1288b5f3dab0c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]     Checking arc-swap v0.4.8
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking crossbeam-channel v0.5.13
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking tari_broadcast_channel v0.3.0
[INFO] [stderr]     Checking tari_pubsub v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `b` is never read
[INFO] [stdout]    --> src/lib.rs:117:13
[INFO] [stdout]     |
[INFO] [stdout] 115 |         struct Dummy {
[INFO] [stdout]     |                ----- field in this struct
[INFO] [stdout] 116 |             a: u32,
[INFO] [stdout] 117 |             b: String,
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Dummy` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[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 4.42s
[INFO] running `Command { std: "docker" "inspect" "176c1294e67d197e3339413b3abefaec52f3eec6c9cd630a5a1288b5f3dab0c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "176c1294e67d197e3339413b3abefaec52f3eec6c9cd630a5a1288b5f3dab0c2", kill_on_drop: false }`
[INFO] [stdout] 176c1294e67d197e3339413b3abefaec52f3eec6c9cd630a5a1288b5f3dab0c2