[INFO] fetching crate rust_observable 0.2.1...
[INFO] checking rust_observable-0.2.1 against try#012cd62c9add58ab3910e44c137d87db3ab70f61 for pr-155915
[INFO] extracting crate rust_observable 0.2.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate rust_observable 0.2.1
[INFO] finished tweaking crates.io crate rust_observable 0.2.1
[INFO] tweaked toml for crates.io crate rust_observable 0.2.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust_observable 0.2.1 on toolchain 012cd62c9add58ab3910e44c137d87db3ab70f61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af4c5c3fafe040f052dd0e39222b09331fd0953e9be7449b80479a73f078813b
[INFO] running `Command { std: "docker" "start" "-a" "af4c5c3fafe040f052dd0e39222b09331fd0953e9be7449b80479a73f078813b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af4c5c3fafe040f052dd0e39222b09331fd0953e9be7449b80479a73f078813b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af4c5c3fafe040f052dd0e39222b09331fd0953e9be7449b80479a73f078813b", kill_on_drop: false }`
[INFO] [stdout] af4c5c3fafe040f052dd0e39222b09331fd0953e9be7449b80479a73f078813b
[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" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+012cd62c9add58ab3910e44c137d87db3ab70f61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7cce14890c6f17f56e0647b54c7826c70a9d67d92812a6717c622de5a9010a2
[INFO] running `Command { std: "docker" "start" "-a" "a7cce14890c6f17f56e0647b54c7826c70a9d67d92812a6717c622de5a9010a2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling rust_observable_literal v0.1.0
[INFO] [stderr]     Checking rust_observable v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:212:51
[INFO] [stdout]     |
[INFO] [stdout] 212 | type BoxedSubscriberFunction<T, Error = ()> = Arc<(dyn SubscriberFunction<T, Error>)>;
[INFO] [stdout]     |                                                   ^                                ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 212 - type BoxedSubscriberFunction<T, Error = ()> = Arc<(dyn SubscriberFunction<T, Error>)>;
[INFO] [stdout] 212 + type BoxedSubscriberFunction<T, Error = ()> = Arc<dyn SubscriberFunction<T, Error>>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:212:51
[INFO] [stdout]     |
[INFO] [stdout] 212 | type BoxedSubscriberFunction<T, Error = ()> = Arc<(dyn SubscriberFunction<T, Error>)>;
[INFO] [stdout]     |                                                   ^                                ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 212 - type BoxedSubscriberFunction<T, Error = ()> = Arc<(dyn SubscriberFunction<T, Error>)>;
[INFO] [stdout] 212 + type BoxedSubscriberFunction<T, Error = ()> = Arc<dyn SubscriberFunction<T, Error>>;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.79s
[INFO] running `Command { std: "docker" "inspect" "a7cce14890c6f17f56e0647b54c7826c70a9d67d92812a6717c622de5a9010a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7cce14890c6f17f56e0647b54c7826c70a9d67d92812a6717c622de5a9010a2", kill_on_drop: false }`
[INFO] [stdout] a7cce14890c6f17f56e0647b54c7826c70a9d67d92812a6717c622de5a9010a2