[INFO] fetching crate observable-rs 0.0.1...
[INFO] testing observable-rs-0.0.1 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate observable-rs 0.0.1 into /workspace/builds/worker-41/source
[INFO] validating manifest of crates.io crate observable-rs 0.0.1 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate observable-rs 0.0.1
[INFO] finished tweaking crates.io crate observable-rs 0.0.1
[INFO] tweaked toml for crates.io crate observable-rs 0.0.1 written to /workspace/builds/worker-41/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d9937863fae403cdca0540bf851e94a5fccd9c19dc85ad2c81176edc44ac410a
[INFO] running `Command { std: "docker" "start" "-a" "d9937863fae403cdca0540bf851e94a5fccd9c19dc85ad2c81176edc44ac410a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d9937863fae403cdca0540bf851e94a5fccd9c19dc85ad2c81176edc44ac410a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9937863fae403cdca0540bf851e94a5fccd9c19dc85ad2c81176edc44ac410a", kill_on_drop: false }`
[INFO] [stdout] d9937863fae403cdca0540bf851e94a5fccd9c19dc85ad2c81176edc44ac410a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6468a36d13a5ba52845dda77c3c9c62d28098dfd38618f8a64632907c8752e8e
[INFO] running `Command { std: "docker" "start" "-a" "6468a36d13a5ba52845dda77c3c9c62d28098dfd38618f8a64632907c8752e8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling observable-rs v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Observe`, `Set`
[INFO] [stdout]  --> src/observable.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{Observe, Set};
[INFO] [stdout]   |             ^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `Command { std: "docker" "inspect" "6468a36d13a5ba52845dda77c3c9c62d28098dfd38618f8a64632907c8752e8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6468a36d13a5ba52845dda77c3c9c62d28098dfd38618f8a64632907c8752e8e", kill_on_drop: false }`
[INFO] [stdout] 6468a36d13a5ba52845dda77c3c9c62d28098dfd38618f8a64632907c8752e8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c291a35ff2c671e20c0c132b89721f0fe74499dcf5bff33fa686245f5495d76
[INFO] running `Command { std: "docker" "start" "-a" "7c291a35ff2c671e20c0c132b89721f0fe74499dcf5bff33fa686245f5495d76", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: unused imports: `Observe`, `Set`
[INFO] [stdout]  --> src/observable.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{Observe, Set};
[INFO] [stdout]   |             ^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling observable-rs v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Observe`, `Set`
[INFO] [stdout]  --> src/observable.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::{Observe, Set};
[INFO] [stdout]   |             ^^^^^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "7c291a35ff2c671e20c0c132b89721f0fe74499dcf5bff33fa686245f5495d76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c291a35ff2c671e20c0c132b89721f0fe74499dcf5bff33fa686245f5495d76", kill_on_drop: false }`
[INFO] [stdout] 7c291a35ff2c671e20c0c132b89721f0fe74499dcf5bff33fa686245f5495d76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-41/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 11d3aa55bf77781f1de0a96c2fa9fc9096eb802957426c560c82f1e4b25e4dd5
[INFO] running `Command { std: "docker" "start" "-a" "11d3aa55bf77781f1de0a96c2fa9fc9096eb802957426c560c82f1e4b25e4dd5", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Observe`, `Set`
[INFO] [stderr]  --> src/observable.rs:3:13
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::{Observe, Set};
[INFO] [stderr]   |             ^^^^^^^  ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `observable-rs` (lib) generated 1 warning
[INFO] [stderr] warning: `observable-rs` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/observable_rs-85a66273a02dcd9b)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests observable-rs
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 3) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.30s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "11d3aa55bf77781f1de0a96c2fa9fc9096eb802957426c560c82f1e4b25e4dd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11d3aa55bf77781f1de0a96c2fa9fc9096eb802957426c560c82f1e4b25e4dd5", kill_on_drop: false }`
[INFO] [stdout] 11d3aa55bf77781f1de0a96c2fa9fc9096eb802957426c560c82f1e4b25e4dd5