[INFO] fetching crate schedwalk 0.1.0...
[INFO] checking schedwalk-0.1.0 against master#38352b01ae4af9300be03b805d6db68c45e51068 for pr-129864
[INFO] extracting crate schedwalk 0.1.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate schedwalk 0.1.0 on toolchain 38352b01ae4af9300be03b805d6db68c45e51068
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate schedwalk 0.1.0
[INFO] finished tweaking crates.io crate schedwalk 0.1.0
[INFO] tweaked toml for crates.io crate schedwalk 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 19 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ada797c28d8ccba7cfc5401888ee0fff18f57b4ac1be5669d49b2747dc6dea4
[INFO] running `Command { std: "docker" "start" "-a" "9ada797c28d8ccba7cfc5401888ee0fff18f57b4ac1be5669d49b2747dc6dea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ada797c28d8ccba7cfc5401888ee0fff18f57b4ac1be5669d49b2747dc6dea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ada797c28d8ccba7cfc5401888ee0fff18f57b4ac1be5669d49b2747dc6dea4", kill_on_drop: false }`
[INFO] [stdout] 9ada797c28d8ccba7cfc5401888ee0fff18f57b4ac1be5669d49b2747dc6dea4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+38352b01ae4af9300be03b805d6db68c45e51068" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5dbc0cf21437a9c1a957558a083befe985ee3c627f0a615dce47c5c622016974
[INFO] running `Command { std: "docker" "start" "-a" "5dbc0cf21437a9c1a957558a083befe985ee3c627f0a615dce47c5c622016974", kill_on_drop: false }`
[INFO] [stderr]     Checking schedwalk v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/lib.rs:333:17
[INFO] [stdout]     |
[INFO] [stdout] 333 |                 drop(sender_a.send(()));
[INFO] [stdout]     |                 ^^^^^-----------------^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      argument has type `Result<(), ()>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 333 -                 drop(sender_a.send(()));
[INFO] [stdout] 333 +                 let _ = sender_a.send(());
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/lib.rs:337:17
[INFO] [stdout]     |
[INFO] [stdout] 337 |                 drop(sender_b.send(()));
[INFO] [stdout]     |                 ^^^^^-----------------^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      argument has type `Result<(), ()>`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 337 -                 drop(sender_b.send(()));
[INFO] [stdout] 337 +                 let _ = sender_b.send(());
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.97s
[INFO] running `Command { std: "docker" "inspect" "5dbc0cf21437a9c1a957558a083befe985ee3c627f0a615dce47c5c622016974", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dbc0cf21437a9c1a957558a083befe985ee3c627f0a615dce47c5c622016974", kill_on_drop: false }`
[INFO] [stdout] 5dbc0cf21437a9c1a957558a083befe985ee3c627f0a615dce47c5c622016974