[INFO] fetching crate stackful 0.1.1...
[INFO] testing stackful-0.1.1 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate stackful 0.1.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate stackful 0.1.1 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 stackful 0.1.1
[INFO] finished tweaking crates.io crate stackful 0.1.1
[INFO] tweaked toml for crates.io crate stackful 0.1.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate stackful 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 2fbae754c0a063072811200a09317ebc498257a2f3810b964399ea84bf7b9ece
[INFO] running `Command { std: "docker" "start" "-a" "2fbae754c0a063072811200a09317ebc498257a2f3810b964399ea84bf7b9ece", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fbae754c0a063072811200a09317ebc498257a2f3810b964399ea84bf7b9ece", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fbae754c0a063072811200a09317ebc498257a2f3810b964399ea84bf7b9ece", kill_on_drop: false }`
[INFO] [stdout] 2fbae754c0a063072811200a09317ebc498257a2f3810b964399ea84bf7b9ece
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 13ee4a31d1b678bbda8d8690edc79c953c4be810cf7f3ce14abddaa621df5f1e
[INFO] running `Command { std: "docker" "start" "-a" "13ee4a31d1b678bbda8d8690edc79c953c4be810cf7f3ce14abddaa621df5f1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling stackful v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling futures-executor v0.3.17
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `Command { std: "docker" "inspect" "13ee4a31d1b678bbda8d8690edc79c953c4be810cf7f3ce14abddaa621df5f1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13ee4a31d1b678bbda8d8690edc79c953c4be810cf7f3ce14abddaa621df5f1e", kill_on_drop: false }`
[INFO] [stdout] 13ee4a31d1b678bbda8d8690edc79c953c4be810cf7f3ce14abddaa621df5f1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] b4393549d014fead8a2fb5c0272f722d75653b5f831f52207e95b1f850ee8959
[INFO] running `Command { std: "docker" "start" "-a" "b4393549d014fead8a2fb5c0272f722d75653b5f831f52207e95b1f850ee8959", kill_on_drop: false }`
[INFO] [stderr]    Compiling futures v0.3.17
[INFO] [stderr]    Compiling async-std v1.10.0
[INFO] [stderr]    Compiling stackful v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 10.29s
[INFO] running `Command { std: "docker" "inspect" "b4393549d014fead8a2fb5c0272f722d75653b5f831f52207e95b1f850ee8959", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4393549d014fead8a2fb5c0272f722d75653b5f831f52207e95b1f850ee8959", kill_on_drop: false }`
[INFO] [stdout] b4393549d014fead8a2fb5c0272f722d75653b5f831f52207e95b1f850ee8959
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 40d6cc6934fdd166e97b6b5abb314d46e9172aa44f14ba4eb66f34e9ff45d2d6
[INFO] running `Command { std: "docker" "start" "-a" "40d6cc6934fdd166e97b6b5abb314d46e9172aa44f14ba4eb66f34e9ff45d2d6", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/stackful-ed1edf52844c3030)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test drop_before_polling ... ok
[INFO] [stdout] test drop_after_polling ... ok
[INFO] [stdout] test panick - should panic ... ok
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stackful
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - (line 30) ... ok
[INFO] [stdout] test src/lib.rs - (line 40) ... ok
[INFO] [stdout] test src/lib.rs - (line 21) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.09s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "40d6cc6934fdd166e97b6b5abb314d46e9172aa44f14ba4eb66f34e9ff45d2d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40d6cc6934fdd166e97b6b5abb314d46e9172aa44f14ba4eb66f34e9ff45d2d6", kill_on_drop: false }`
[INFO] [stdout] 40d6cc6934fdd166e97b6b5abb314d46e9172aa44f14ba4eb66f34e9ff45d2d6