[INFO] fetching crate take_ref 0.2.0...
[INFO] testing take_ref-0.2.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate take_ref 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate take_ref 0.2.0 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 take_ref 0.2.0
[INFO] finished tweaking crates.io crate take_ref 0.2.0
[INFO] tweaked toml for crates.io crate take_ref 0.2.0 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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b61f159d57bdf2a984a4b9eeace1fecdb33d1f8d26d277f8c86a4e61b3f86b08
[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" "b61f159d57bdf2a984a4b9eeace1fecdb33d1f8d26d277f8c86a4e61b3f86b08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b61f159d57bdf2a984a4b9eeace1fecdb33d1f8d26d277f8c86a4e61b3f86b08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b61f159d57bdf2a984a4b9eeace1fecdb33d1f8d26d277f8c86a4e61b3f86b08", kill_on_drop: false }`
[INFO] [stdout] b61f159d57bdf2a984a4b9eeace1fecdb33d1f8d26d277f8c86a4e61b3f86b08
[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] c195077317db277cb318789470d575640d08207d7b3f1623f8e2c80389fe998b
[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" "c195077317db277cb318789470d575640d08207d7b3f1623f8e2c80389fe998b", kill_on_drop: false }`
[INFO] [stderr]    Compiling take_ref v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "c195077317db277cb318789470d575640d08207d7b3f1623f8e2c80389fe998b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c195077317db277cb318789470d575640d08207d7b3f1623f8e2c80389fe998b", kill_on_drop: false }`
[INFO] [stdout] c195077317db277cb318789470d575640d08207d7b3f1623f8e2c80389fe998b
[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] f4d0d1dbd50ec31848f7a2c5fe36d15b4015aaae4d77034bd0ff810a0e9569b1
[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" "f4d0d1dbd50ec31848f7a2c5fe36d15b4015aaae4d77034bd0ff810a0e9569b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling take_ref v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "f4d0d1dbd50ec31848f7a2c5fe36d15b4015aaae4d77034bd0ff810a0e9569b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4d0d1dbd50ec31848f7a2c5fe36d15b4015aaae4d77034bd0ff810a0e9569b1", kill_on_drop: false }`
[INFO] [stdout] f4d0d1dbd50ec31848f7a2c5fe36d15b4015aaae4d77034bd0ff810a0e9569b1
[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] 7ca58c2213920716c492870a592891e62c938aed5ded15fcf1094d02b97a9eba
[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" "7ca58c2213920716c492870a592891e62c938aed5ded15fcf1094d02b97a9eba", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/take_ref-12862ef048aa1c93
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests take_ref
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test src/take_ref.rs - take_ref::TakeRef (line 36) ... ok
[INFO] [stdout] test src/take_ref.rs - take_ref::TakeRef (line 28) ... ok
[INFO] [stdout] test src/take_string.rs - take_string::TakeString (line 27) ... ok
[INFO] [stdout] test src/take_slice.rs - take_slice::TakeSlice (line 32) ... ok
[INFO] [stdout] test src/take_string.rs - take_string::TakeString (line 35) ... ok
[INFO] [stdout] test src/take_slice.rs - take_slice::TakeSlice (line 24) ... ok
[INFO] [stdout] test src/take_string.rs - take_string::TakeString (line 9) ... ok
[INFO] [stdout] test src/take_ref.rs - take_ref::TakeRef (line 7) ... ok
[INFO] [stdout] test src/take_slice.rs - take_slice::TakeSlice (line 7) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7ca58c2213920716c492870a592891e62c938aed5ded15fcf1094d02b97a9eba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ca58c2213920716c492870a592891e62c938aed5ded15fcf1094d02b97a9eba", kill_on_drop: false }`
[INFO] [stdout] 7ca58c2213920716c492870a592891e62c938aed5ded15fcf1094d02b97a9eba