[INFO] fetching crate stackful 0.1.5...
[INFO] testing stackful-0.1.5 against 1.100.0-beta.1 for beta-1.100-2
[INFO] extracting crate stackful 0.1.5 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate stackful 0.1.5
[INFO] finished tweaking crates.io crate stackful 0.1.5
[INFO] tweaked toml for crates.io crate stackful 0.1.5 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stackful 0.1.5 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate stackful 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5
[INFO] running `Command { std: "docker" "start" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-sink v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling slab v0.4.5
[INFO] [stderr]    Compiling futures-io v0.3.21
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling pin-project-lite v0.2.8
[INFO] [stderr]    Compiling stackful v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.16
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling futures-executor v0.3.21
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]   --> src/generator.rs:29:11
[INFO] [stdout]    |
[INFO] [stdout] 29 |     #[cfg(feature = "stacker")]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]    = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]   --> src/generator.rs:53:19
[INFO] [stdout]    |
[INFO] [stdout] 53 |             #[cfg(feature = "stacker")]
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]    = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:114:15
[INFO] [stdout]     |
[INFO] [stdout] 114 |         #[cfg(feature = "stacker")]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:140:15
[INFO] [stdout]     |
[INFO] [stdout] 140 |         #[cfg(feature = "stacker")]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:122:23
[INFO] [stdout]     |
[INFO] [stdout] 122 |                 #[cfg(feature = "stacker")]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:133:23
[INFO] [stdout]     |
[INFO] [stdout] 133 |                 #[cfg(feature = "stacker")]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.10s
[INFO] running `Command { std: "docker" "inspect" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling cache-padded v1.2.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling event-listener v2.5.2
[INFO] [stderr]    Compiling parking v2.0.0
[INFO] [stderr]    Compiling waker-fn v1.1.0
[INFO] [stderr]    Compiling fastrand v1.7.0
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.9
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling ctor v0.1.22
[INFO] [stderr]    Compiling socket2 v0.4.4
[INFO] [stderr]    Compiling async-task v4.2.0
[INFO] [stderr]    Compiling signal-hook v0.3.13
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling atomic-waker v1.0.0
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling futures v0.3.21
[INFO] [stderr]    Compiling concurrent-queue v1.2.2
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]   --> src/generator.rs:29:11
[INFO] [stdout]    |
[INFO] [stdout] 29 |     #[cfg(feature = "stacker")]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]    = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]   --> src/generator.rs:53:19
[INFO] [stdout]    |
[INFO] [stdout] 53 |             #[cfg(feature = "stacker")]
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]    = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:114:15
[INFO] [stdout]     |
[INFO] [stdout] 114 |         #[cfg(feature = "stacker")]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:140:15
[INFO] [stdout]     |
[INFO] [stdout] 140 |         #[cfg(feature = "stacker")]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:122:23
[INFO] [stdout]     |
[INFO] [stdout] 122 |                 #[cfg(feature = "stacker")]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:133:23
[INFO] [stdout]     |
[INFO] [stdout] 133 |                 #[cfg(feature = "stacker")]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling async-lock v2.5.0
[INFO] [stderr]    Compiling futures-lite v1.12.0
[INFO] [stderr]    Compiling async-channel v1.6.1
[INFO] [stderr]    Compiling polling v2.2.0
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling async-io v1.6.0
[INFO] [stderr]    Compiling blocking v1.2.0
[INFO] [stderr]    Compiling async-executor v1.4.1
[INFO] [stderr]    Compiling async-process v1.4.0
[INFO] [stderr]    Compiling async-global-executor v2.0.4
[INFO] [stderr]    Compiling async-std v1.11.0
[INFO] [stderr]    Compiling stackful v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]   --> src/generator.rs:29:11
[INFO] [stdout]    |
[INFO] [stdout] 29 |     #[cfg(feature = "stacker")]
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]    = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]   --> src/generator.rs:53:19
[INFO] [stdout]    |
[INFO] [stdout] 53 |             #[cfg(feature = "stacker")]
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]    = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:114:15
[INFO] [stdout]     |
[INFO] [stdout] 114 |         #[cfg(feature = "stacker")]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:140:15
[INFO] [stdout]     |
[INFO] [stdout] 140 |         #[cfg(feature = "stacker")]
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:122:23
[INFO] [stdout]     |
[INFO] [stdout] 122 |                 #[cfg(feature = "stacker")]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stdout]    --> src/generator.rs:133:23
[INFO] [stdout]     |
[INFO] [stdout] 133 |                 #[cfg(feature = "stacker")]
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stdout]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 9.47s
[INFO] running `Command { std: "docker" "inspect" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stderr]   --> src/generator.rs:29:11
[INFO] [stderr]    |
[INFO] [stderr] 29 |     #[cfg(feature = "stacker")]
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stderr]    = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stderr]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stderr]   --> src/generator.rs:53:19
[INFO] [stderr]    |
[INFO] [stderr] 53 |             #[cfg(feature = "stacker")]
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stderr]    = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stderr]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stderr]    --> src/generator.rs:114:15
[INFO] [stderr]     |
[INFO] [stderr] 114 |         #[cfg(feature = "stacker")]
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stderr]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stderr]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stderr]    --> src/generator.rs:140:15
[INFO] [stderr]     |
[INFO] [stderr] 140 |         #[cfg(feature = "stacker")]
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stderr]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stderr]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stderr]    --> src/generator.rs:122:23
[INFO] [stderr]     |
[INFO] [stderr] 122 |                 #[cfg(feature = "stacker")]
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stderr]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stderr]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `stacker`
[INFO] [stderr]    --> src/generator.rs:133:23
[INFO] [stderr]     |
[INFO] [stderr] 133 |                 #[cfg(feature = "stacker")]
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected values for `feature` are: `default`, `future`, `futures-executor`, and `nightly`
[INFO] [stderr]     = help: consider adding `stacker` as a feature in `Cargo.toml`
[INFO] [stderr]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr] 
[INFO] [stderr] warning: `stackful` (lib) generated 6 warnings
[INFO] [stderr] warning: `stackful` (lib test) generated 6 warnings (6 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/build/stackful/5310acab05ea01cc/out/stackful-5310acab05ea01cc)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test future::drop_after_polling ... ok
[INFO] [stdout] test generator::test_generator ... ok
[INFO] [stdout] test future::drop_before_polling ... ok
[INFO] [stdout] test future::panick - should panic ... ok
[INFO] [stdout] test future::test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests stackful
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - (line 40) ... ok
[INFO] [stdout] test src/lib.rs - (line 30) ... 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 1.31s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5", kill_on_drop: false }`
[INFO] [stdout] 7a675b3a8253b83f4dff4556d362ebefe02edac0faef5d4ee40776a149aeaff5
