[INFO] fetching crate observable-react 0.0.1...
[INFO] checking observable-react-0.0.1 against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] extracting crate observable-react 0.0.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate observable-react 0.0.1 on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate observable-react 0.0.1
[INFO] finished tweaking crates.io crate observable-react 0.0.1
[INFO] tweaked toml for crates.io crate observable-react 0.0.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded observable-rs v0.0.1
[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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b400e2367c13d89c2da13041f329b5798b6ac8d04a0e16a1cb185d6e5bc55f1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4b400e2367c13d89c2da13041f329b5798b6ac8d04a0e16a1cb185d6e5bc55f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b400e2367c13d89c2da13041f329b5798b6ac8d04a0e16a1cb185d6e5bc55f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b400e2367c13d89c2da13041f329b5798b6ac8d04a0e16a1cb185d6e5bc55f1", kill_on_drop: false }`
[INFO] [stdout] 4b400e2367c13d89c2da13041f329b5798b6ac8d04a0e16a1cb185d6e5bc55f1
[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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c0290ace70f8358cfd7a32d1a5daa781dd898a8124b55bc130fc1cdf310a36eb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c0290ace70f8358cfd7a32d1a5daa781dd898a8124b55bc130fc1cdf310a36eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling wasm-bindgen v0.2.73
[INFO] [stderr]     Checking dyn-clone v1.0.4
[INFO] [stderr]     Checking observable-rs v0.0.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.3.23
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.73
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.73
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.73
[INFO] [stderr]     Checking js-sys v0.3.50
[INFO] [stderr]     Checking console_error_panic_hook v0.1.6
[INFO] [stderr]     Checking wasm-bindgen-futures v0.4.23
[INFO] [stderr]     Checking wasm-bindgen-test v0.3.23
[INFO] [stderr]     Checking observable-react v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::unimplemented`
[INFO] [stdout]  --> src/observable.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::unimplemented;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ReactObservable`
[INFO] [stdout]  --> src/react.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::ReactObservable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Observe`
[INFO] [stdout]  --> src/impls.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use observable_rs::{Observable, Observe};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Observe`
[INFO] [stdout]  --> src/traits.rs:3:49
[INFO] [stdout]   |
[INFO] [stdout] 3 | use observable_rs::{ListenerHandle, Observable, Observe, Set};
[INFO] [stdout]   |                                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Set`
[INFO] [stdout]  --> src/traits.rs:3:58
[INFO] [stdout]   |
[INFO] [stdout] 3 | use observable_rs::{ListenerHandle, Observable, Observe, Set};
[INFO] [stdout]   |                                                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::unimplemented`
[INFO] [stdout]  --> src/observable.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::unimplemented;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ReactObservable`
[INFO] [stdout]  --> src/react.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use crate::ReactObservable;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Observe`
[INFO] [stdout]  --> src/impls.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use observable_rs::{Observable, Observe};
[INFO] [stdout]   |                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Observe`
[INFO] [stdout]  --> src/traits.rs:3:49
[INFO] [stdout]   |
[INFO] [stdout] 3 | use observable_rs::{ListenerHandle, Observable, Observe, Set};
[INFO] [stdout]   |                                                 ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Set`
[INFO] [stdout]  --> src/traits.rs:3:58
[INFO] [stdout]   |
[INFO] [stdout] 3 | use observable_rs::{ListenerHandle, Observable, Observe, Set};
[INFO] [stdout]   |                                                          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.42s
[INFO] running `Command { std: "docker" "inspect" "c0290ace70f8358cfd7a32d1a5daa781dd898a8124b55bc130fc1cdf310a36eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0290ace70f8358cfd7a32d1a5daa781dd898a8124b55bc130fc1cdf310a36eb", kill_on_drop: false }`
[INFO] [stdout] c0290ace70f8358cfd7a32d1a5daa781dd898a8124b55bc130fc1cdf310a36eb