[INFO] fetching crate test_futures 0.0.1...
[INFO] testing test_futures-0.0.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate test_futures 0.0.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate test_futures 0.0.1 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 test_futures 0.0.1
[INFO] finished tweaking crates.io crate test_futures 0.0.1
[INFO] tweaked toml for crates.io crate test_futures 0.0.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 179729b6a756fc0aeec1918a3b30365da6938d7f384919195fb3d8a0360bb492
[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" "179729b6a756fc0aeec1918a3b30365da6938d7f384919195fb3d8a0360bb492", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "179729b6a756fc0aeec1918a3b30365da6938d7f384919195fb3d8a0360bb492", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "179729b6a756fc0aeec1918a3b30365da6938d7f384919195fb3d8a0360bb492", kill_on_drop: false }`
[INFO] [stdout] 179729b6a756fc0aeec1918a3b30365da6938d7f384919195fb3d8a0360bb492
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2af3e87fe859fb5f24c3bf0018473af18cfcbd89935aecc1db10be4d0c177d96
[INFO] running `Command { std: "docker" "start" "-a" "2af3e87fe859fb5f24c3bf0018473af18cfcbd89935aecc1db10be4d0c177d96", kill_on_drop: false }`
[INFO] [stderr]    Compiling test_futures v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "2af3e87fe859fb5f24c3bf0018473af18cfcbd89935aecc1db10be4d0c177d96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2af3e87fe859fb5f24c3bf0018473af18cfcbd89935aecc1db10be4d0c177d96", kill_on_drop: false }`
[INFO] [stdout] 2af3e87fe859fb5f24c3bf0018473af18cfcbd89935aecc1db10be4d0c177d96
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae25cdf453cd8669ceebd65fac08a34d4b22e7a62c15b1f5e62da2fcfb0c3785
[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" "ae25cdf453cd8669ceebd65fac08a34d4b22e7a62c15b1f5e62da2fcfb0c3785", kill_on_drop: false }`
[INFO] [stderr]    Compiling test_futures v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "ae25cdf453cd8669ceebd65fac08a34d4b22e7a62c15b1f5e62da2fcfb0c3785", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae25cdf453cd8669ceebd65fac08a34d4b22e7a62c15b1f5e62da2fcfb0c3785", kill_on_drop: false }`
[INFO] [stdout] ae25cdf453cd8669ceebd65fac08a34d4b22e7a62c15b1f5e62da2fcfb0c3785
[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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6e98e3375c82da90a5cb1528376d9f6354d60427aaeb78fdbd84fd60b0d05f7f
[INFO] running `Command { std: "docker" "start" "-a" "6e98e3375c82da90a5cb1528376d9f6354d60427aaeb78fdbd84fd60b0d05f7f", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/test_futures-76c7d755b58f9b6e
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests test_futures
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6e98e3375c82da90a5cb1528376d9f6354d60427aaeb78fdbd84fd60b0d05f7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e98e3375c82da90a5cb1528376d9f6354d60427aaeb78fdbd84fd60b0d05f7f", kill_on_drop: false }`
[INFO] [stdout] 6e98e3375c82da90a5cb1528376d9f6354d60427aaeb78fdbd84fd60b0d05f7f