[INFO] fetching crate medea-reactive 0.1.2...
[INFO] checking medea-reactive-0.1.2 against master#49b3924bd4a34d3cf9c37b74120fba78d9712ab8 for pr-118247
[INFO] extracting crate medea-reactive 0.1.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate medea-reactive 0.1.2 on toolchain 49b3924bd4a34d3cf9c37b74120fba78d9712ab8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+49b3924bd4a34d3cf9c37b74120fba78d9712ab8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate medea-reactive 0.1.2
[INFO] finished tweaking crates.io crate medea-reactive 0.1.2
[INFO] tweaked toml for crates.io crate medea-reactive 0.1.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+49b3924bd4a34d3cf9c37b74120fba78d9712ab8" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+49b3924bd4a34d3cf9c37b74120fba78d9712ab8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+49b3924bd4a34d3cf9c37b74120fba78d9712ab8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] add1f4503becd25ff3193240f13009dfc18213ff94d052ea142d2427f7781f0a
[INFO] running `Command { std: "docker" "start" "-a" "add1f4503becd25ff3193240f13009dfc18213ff94d052ea142d2427f7781f0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "add1f4503becd25ff3193240f13009dfc18213ff94d052ea142d2427f7781f0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "add1f4503becd25ff3193240f13009dfc18213ff94d052ea142d2427f7781f0a", kill_on_drop: false }`
[INFO] [stdout] add1f4503becd25ff3193240f13009dfc18213ff94d052ea142d2427f7781f0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+49b3924bd4a34d3cf9c37b74120fba78d9712ab8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca685e54469e80c3888aedead6ce84ed32838f6b1a0800890f41149aff819eb0
[INFO] running `Command { std: "docker" "start" "-a" "ca685e54469e80c3888aedead6ce84ed32838f6b1a0800890f41149aff819eb0", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures-util v0.3.29
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]    Compiling futures-macro v0.3.29
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking tokio v1.34.0
[INFO] [stderr]     Checking futures-executor v0.3.29
[INFO] [stderr]     Checking futures v0.3.29
[INFO] [stderr]     Checking medea-reactive v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: non-binding let on a type that implements `Drop`
[INFO] [stdout]    --> src/subscribers_store/progressable/processed.rs:162:17
[INFO] [stdout]     |
[INFO] [stdout] 162 | /                 let _ = spawn_local({
[INFO] [stdout] 163 | |                     let updatable_cell = Rc::clone(&updatable_cell);
[INFO] [stdout] 164 | |                     let mut updatable_cell_rx =
[INFO] [stdout] 165 | |                         updatable_cell.subscribe().skip(1).fuse();
[INFO] [stdout] ...   |
[INFO] [stdout] 185 | |                     }
[INFO] [stdout] 186 | |                 });
[INFO] [stdout]     | |___________________^
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let_underscore_drop,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: consider binding to an unused variable to avoid immediately dropping the value
[INFO] [stdout]     |
[INFO] [stdout] 162 |                 let _unused = spawn_local({
[INFO] [stdout]     |                     ~~~~~~~
[INFO] [stdout] help: consider immediately dropping the value
[INFO] [stdout]     |
[INFO] [stdout] 162 ~                 drop(spawn_local({
[INFO] [stdout] 163 |                     let updatable_cell = Rc::clone(&updatable_cell);
[INFO] [stdout]   ...
[INFO] [stdout] 185 |                     }
[INFO] [stdout] 186 ~                 }));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.41s
[INFO] running `Command { std: "docker" "inspect" "ca685e54469e80c3888aedead6ce84ed32838f6b1a0800890f41149aff819eb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca685e54469e80c3888aedead6ce84ed32838f6b1a0800890f41149aff819eb0", kill_on_drop: false }`
[INFO] [stdout] ca685e54469e80c3888aedead6ce84ed32838f6b1a0800890f41149aff819eb0