[INFO] fetching crate takeable-option 0.5.0...
[INFO] testing takeable-option-0.5.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate takeable-option 0.5.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate takeable-option 0.5.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate takeable-option 0.5.0
[INFO] finished tweaking crates.io crate takeable-option 0.5.0
[INFO] tweaked toml for crates.io crate takeable-option 0.5.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", 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] 943b55ae2fe12eb095f7cb59935b8ab2d9e8fcb7aca38455ecfcd506329a3c72
[INFO] running `Command { std: "docker" "start" "-a" "943b55ae2fe12eb095f7cb59935b8ab2d9e8fcb7aca38455ecfcd506329a3c72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "943b55ae2fe12eb095f7cb59935b8ab2d9e8fcb7aca38455ecfcd506329a3c72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "943b55ae2fe12eb095f7cb59935b8ab2d9e8fcb7aca38455ecfcd506329a3c72", kill_on_drop: false }`
[INFO] [stdout] 943b55ae2fe12eb095f7cb59935b8ab2d9e8fcb7aca38455ecfcd506329a3c72
[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" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7a0023d5f3421bfb29f95078e8272c10199c61fa2834cc2a1d5171d5c228c18
[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" "a7a0023d5f3421bfb29f95078e8272c10199c61fa2834cc2a1d5171d5c228c18", kill_on_drop: false }`
[INFO] [stderr]    Compiling takeable-option v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "a7a0023d5f3421bfb29f95078e8272c10199c61fa2834cc2a1d5171d5c228c18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7a0023d5f3421bfb29f95078e8272c10199c61fa2834cc2a1d5171d5c228c18", kill_on_drop: false }`
[INFO] [stdout] a7a0023d5f3421bfb29f95078e8272c10199c61fa2834cc2a1d5171d5c228c18
[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" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0dc24b6f05a7f09f7b89846af352981c9187aac3d65cafb0641526757bf7b9bb
[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" "0dc24b6f05a7f09f7b89846af352981c9187aac3d65cafb0641526757bf7b9bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling takeable-option v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "0dc24b6f05a7f09f7b89846af352981c9187aac3d65cafb0641526757bf7b9bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0dc24b6f05a7f09f7b89846af352981c9187aac3d65cafb0641526757bf7b9bb", kill_on_drop: false }`
[INFO] [stdout] 0dc24b6f05a7f09f7b89846af352981c9187aac3d65cafb0641526757bf7b9bb
[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" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b7f7c29e51879362046e9e50dba5cd70e0b89a3bb8997014a4b4b81fb0bc52a8
[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" "b7f7c29e51879362046e9e50dba5cd70e0b89a3bb8997014a4b4b81fb0bc52a8", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/takeable_option-ab045a3a11e40354
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests takeable-option
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b7f7c29e51879362046e9e50dba5cd70e0b89a3bb8997014a4b4b81fb0bc52a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7f7c29e51879362046e9e50dba5cd70e0b89a3bb8997014a4b4b81fb0bc52a8", kill_on_drop: false }`
[INFO] [stdout] b7f7c29e51879362046e9e50dba5cd70e0b89a3bb8997014a4b4b81fb0bc52a8