[INFO] fetching crate stackful 0.1.0...
[INFO] testing stackful-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate stackful 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate stackful 0.1.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate stackful 0.1.0
[INFO] finished tweaking crates.io crate stackful 0.1.0
[INFO] tweaked toml for crates.io crate stackful 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate stackful 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 851849e676fecc7e0add4e129489a448df98cd91ab78ffe81588139fe0c8038c
[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" "851849e676fecc7e0add4e129489a448df98cd91ab78ffe81588139fe0c8038c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "851849e676fecc7e0add4e129489a448df98cd91ab78ffe81588139fe0c8038c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "851849e676fecc7e0add4e129489a448df98cd91ab78ffe81588139fe0c8038c", kill_on_drop: false }`
[INFO] [stdout] 851849e676fecc7e0add4e129489a448df98cd91ab78ffe81588139fe0c8038c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a5a35c00dc33205a2dbd87134ee2594dbf16141ae2f7ab2cd3215bbf34309a28
[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" "a5a35c00dc33205a2dbd87134ee2594dbf16141ae2f7ab2cd3215bbf34309a28", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling once_cell v1.4.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.16
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling stackful v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.17
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling pin-project v0.4.17
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling futures-executor v0.3.5
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.69s
[INFO] running `Command { std: "docker" "inspect" "a5a35c00dc33205a2dbd87134ee2594dbf16141ae2f7ab2cd3215bbf34309a28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5a35c00dc33205a2dbd87134ee2594dbf16141ae2f7ab2cd3215bbf34309a28", kill_on_drop: false }`
[INFO] [stdout] a5a35c00dc33205a2dbd87134ee2594dbf16141ae2f7ab2cd3215bbf34309a28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86963a8d0a3ccc64dec55ee3664808732951f19015a4d991c2bc14e0b0150d0a
[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" "86963a8d0a3ccc64dec55ee3664808732951f19015a4d991c2bc14e0b0150d0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling scoped-tls-hkt v0.1.2
[INFO] [stderr]    Compiling async-task v3.0.0
[INFO] [stderr]    Compiling pin-project-lite v0.1.6
[INFO] [stderr]    Compiling crossbeam-queue v0.2.2
[INFO] [stderr]    Compiling crossbeam-channel v0.4.2
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling piper v0.1.3
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling crossbeam v0.7.3
[INFO] [stderr]    Compiling kv-log-macro v1.0.6
[INFO] [stderr]    Compiling smol v0.1.10
[INFO] [stderr]    Compiling async-std v1.6.0
[INFO] [stderr]    Compiling stackful v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 16.66s
[INFO] running `Command { std: "docker" "inspect" "86963a8d0a3ccc64dec55ee3664808732951f19015a4d991c2bc14e0b0150d0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86963a8d0a3ccc64dec55ee3664808732951f19015a4d991c2bc14e0b0150d0a", kill_on_drop: false }`
[INFO] [stdout] 86963a8d0a3ccc64dec55ee3664808732951f19015a4d991c2bc14e0b0150d0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2000d6468163d25e4a298afca12d5b06ce909a71d32cf2559ef82817c1cbdd29
[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" "2000d6468163d25e4a298afca12d5b06ce909a71d32cf2559ef82817c1cbdd29", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/stackful-58a8f5de2977be49
[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 ... ok
[INFO] [stdout] test test ... ok
[INFO] [stderr]    Doc-tests stackful
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2000d6468163d25e4a298afca12d5b06ce909a71d32cf2559ef82817c1cbdd29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2000d6468163d25e4a298afca12d5b06ce909a71d32cf2559ef82817c1cbdd29", kill_on_drop: false }`
[INFO] [stdout] 2000d6468163d25e4a298afca12d5b06ce909a71d32cf2559ef82817c1cbdd29