[INFO] fetching crate double_decker 0.0.3...
[INFO] testing double_decker-0.0.3 against 1.55.0 for beta-1.56-1
[INFO] extracting crate double_decker 0.0.3 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate double_decker 0.0.3 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate double_decker 0.0.3
[INFO] finished tweaking crates.io crate double_decker 0.0.3
[INFO] tweaked toml for crates.io crate double_decker 0.0.3 written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ef8e65fd8121bd1b10169e4959892fe5d39e760d17715a618032202dc197ab2
[INFO] running `Command { std: "docker" "start" "-a" "1ef8e65fd8121bd1b10169e4959892fe5d39e760d17715a618032202dc197ab2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ef8e65fd8121bd1b10169e4959892fe5d39e760d17715a618032202dc197ab2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ef8e65fd8121bd1b10169e4959892fe5d39e760d17715a618032202dc197ab2", kill_on_drop: false }`
[INFO] [stdout] 1ef8e65fd8121bd1b10169e4959892fe5d39e760d17715a618032202dc197ab2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 073190fba9c4e11f0d3cf970616993e2976c002ff1bbd7ab00fb6a9b817a52e1
[INFO] running `Command { std: "docker" "start" "-a" "073190fba9c4e11f0d3cf970616993e2976c002ff1bbd7ab00fb6a9b817a52e1", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling crossbeam-queue v0.3.2
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling crossbeam v0.8.1
[INFO] [stderr]    Compiling double_decker v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.37s
[INFO] running `Command { std: "docker" "inspect" "073190fba9c4e11f0d3cf970616993e2976c002ff1bbd7ab00fb6a9b817a52e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "073190fba9c4e11f0d3cf970616993e2976c002ff1bbd7ab00fb6a9b817a52e1", kill_on_drop: false }`
[INFO] [stdout] 073190fba9c4e11f0d3cf970616993e2976c002ff1bbd7ab00fb6a9b817a52e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d7d5525ffa4e3427b0e7af6363a6668ba13b5751881d39a07554af96fe3bb76
[INFO] running `Command { std: "docker" "start" "-a" "0d7d5525ffa4e3427b0e7af6363a6668ba13b5751881d39a07554af96fe3bb76", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling double_decker v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "0d7d5525ffa4e3427b0e7af6363a6668ba13b5751881d39a07554af96fe3bb76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d7d5525ffa4e3427b0e7af6363a6668ba13b5751881d39a07554af96fe3bb76", kill_on_drop: false }`
[INFO] [stdout] 0d7d5525ffa4e3427b0e7af6363a6668ba13b5751881d39a07554af96fe3bb76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 28fa3e583f349079dcefb5cbfac90c1d9b7819f29c0d303437481fe0e15d240f
[INFO] running `Command { std: "docker" "start" "-a" "28fa3e583f349079dcefb5cbfac90c1d9b7819f29c0d303437481fe0e15d240f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.18s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/double_decker-c527f47718948c1b)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::clone_subscription_without_dropping ... ok
[INFO] [stdout] test tests::subscribe_on_thread ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/lib.rs (/opt/rustwide/target/debug/deps/lib-9fb10ddbcb9120a5)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test it_detects_closure ... ok
[INFO] [stdout] test it_fails_when_empty ... ok
[INFO] [stdout] test it_handles_leaves ... ok
[INFO] [stdout] test it_recvs_after_close ... ok
[INFO] [stdout] test it_works ... ok
[INFO] [stdout] test it_runs_blocked_reads ... ok
[INFO] [stdout] test it_iterates ... ok
[INFO] [stdout] test it_can_count_to_10000 ... ok
[INFO] [stdout] test aggressive_iteration ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.76s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests double_decker
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - (line 33) ... ok
[INFO] [stdout] test src/lib.rs - (line 47) ... ok
[INFO] [stdout] test src/lib.rs - (line 80) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 24.09s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "28fa3e583f349079dcefb5cbfac90c1d9b7819f29c0d303437481fe0e15d240f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28fa3e583f349079dcefb5cbfac90c1d9b7819f29c0d303437481fe0e15d240f", kill_on_drop: false }`
[INFO] [stdout] 28fa3e583f349079dcefb5cbfac90c1d9b7819f29c0d303437481fe0e15d240f