[INFO] fetching crate async-gcode 0.2.0...
[INFO] checking async-gcode-0.2.0 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate async-gcode 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate async-gcode 0.2.0 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async-gcode 0.2.0
[INFO] finished tweaking crates.io crate async-gcode 0.2.0
[INFO] tweaked toml for crates.io crate async-gcode 0.2.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate async-gcode 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ada24cd56df81a45220d61c398a139b23c0837b46a8d58d88afb744dd6901483
[INFO] running `Command { std: "docker" "start" "-a" "ada24cd56df81a45220d61c398a139b23c0837b46a8d58d88afb744dd6901483", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ada24cd56df81a45220d61c398a139b23c0837b46a8d58d88afb744dd6901483", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ada24cd56df81a45220d61c398a139b23c0837b46a8d58d88afb744dd6901483", kill_on_drop: false }`
[INFO] [stdout] ada24cd56df81a45220d61c398a139b23c0837b46a8d58d88afb744dd6901483
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e56ac22db39a2968057bb8b64faaa098e72fa02865da300581bcd65176606e4
[INFO] running `Command { std: "docker" "start" "-a" "2e56ac22db39a2968057bb8b64faaa098e72fa02865da300581bcd65176606e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]     Checking futures-core v0.3.5
[INFO] [stderr]     Checking once_cell v1.4.0
[INFO] [stderr]     Checking futures-sink v0.3.5
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking futures-io v0.3.5
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]     Checking pin-project-lite v0.1.7
[INFO] [stderr]     Checking futures-channel v0.3.5
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking async-gcode v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/stream.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | /     pin_project! {
[INFO] [stdout] 42 | |         pub(crate) struct PushBack<S: TryStream> {
[INFO] [stdout] 43 | |             #[pin]
[INFO] [stdout] 44 | |             stream: S,
[INFO] [stdout] 45 | |             val: Option<S::Ok>,
[INFO] [stdout] 46 | |         }
[INFO] [stdout] 47 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `$crate::__pin_project_internal` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/stream.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | /     pin_project! {
[INFO] [stdout] 42 | |         pub(crate) struct PushBack<S: TryStream> {
[INFO] [stdout] 43 | |             #[pin]
[INFO] [stdout] 44 | |             stream: S,
[INFO] [stdout] 45 | |             val: Option<S::Ok>,
[INFO] [stdout] 46 | |         }
[INFO] [stdout] 47 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `$crate::__pin_project_internal` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/stream.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | /     pin_project! {
[INFO] [stdout] 42 | |         pub(crate) struct PushBack<S: TryStream> {
[INFO] [stdout] 43 | |             #[pin]
[INFO] [stdout] 44 | |             stream: S,
[INFO] [stdout] 45 | |             val: Option<S::Ok>,
[INFO] [stdout] 46 | |         }
[INFO] [stdout] 47 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `$crate::__pin_project_internal` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/stream.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | /     pin_project! {
[INFO] [stdout] 42 | |         pub(crate) struct PushBack<S: TryStream> {
[INFO] [stdout] 43 | |             #[pin]
[INFO] [stdout] 44 | |             stream: S,
[INFO] [stdout] 45 | |             val: Option<S::Ok>,
[INFO] [stdout] 46 | |         }
[INFO] [stdout] 47 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `$crate::__pin_project_internal` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.31s
[INFO] running `Command { std: "docker" "inspect" "2e56ac22db39a2968057bb8b64faaa098e72fa02865da300581bcd65176606e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e56ac22db39a2968057bb8b64faaa098e72fa02865da300581bcd65176606e4", kill_on_drop: false }`
[INFO] [stdout] 2e56ac22db39a2968057bb8b64faaa098e72fa02865da300581bcd65176606e4