[INFO] fetching crate library_core 0.1.2...
[INFO] testing library_core-0.1.2 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate library_core 0.1.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate library_core 0.1.2 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 library_core 0.1.2
[INFO] finished tweaking crates.io crate library_core 0.1.2
[INFO] tweaked toml for crates.io crate library_core 0.1.2 written to /workspace/builds/worker-13/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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stdout] 7efbbfab2dae9467168f261279d46491a17bc444b5f5dd36b322fc125f9acd1f
[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" "7efbbfab2dae9467168f261279d46491a17bc444b5f5dd36b322fc125f9acd1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7efbbfab2dae9467168f261279d46491a17bc444b5f5dd36b322fc125f9acd1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7efbbfab2dae9467168f261279d46491a17bc444b5f5dd36b322fc125f9acd1f", kill_on_drop: false }`
[INFO] [stdout] 7efbbfab2dae9467168f261279d46491a17bc444b5f5dd36b322fc125f9acd1f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d8d6e7cca00ecb27e3062d81bd43c4a3e379b7be901dfa9db05d469d21a8fc06
[INFO] running `Command { std: "docker" "start" "-a" "d8d6e7cca00ecb27e3062d81bd43c4a3e379b7be901dfa9db05d469d21a8fc06", kill_on_drop: false }`
[INFO] [stderr]    Compiling library_core v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `Command { std: "docker" "inspect" "d8d6e7cca00ecb27e3062d81bd43c4a3e379b7be901dfa9db05d469d21a8fc06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8d6e7cca00ecb27e3062d81bd43c4a3e379b7be901dfa9db05d469d21a8fc06", kill_on_drop: false }`
[INFO] [stdout] d8d6e7cca00ecb27e3062d81bd43c4a3e379b7be901dfa9db05d469d21a8fc06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] adc14f38ea1a9c94ecdcc804b79223573de14d54f767653f475f9117053155e9
[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" "adc14f38ea1a9c94ecdcc804b79223573de14d54f767653f475f9117053155e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling library_core v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "adc14f38ea1a9c94ecdcc804b79223573de14d54f767653f475f9117053155e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adc14f38ea1a9c94ecdcc804b79223573de14d54f767653f475f9117053155e9", kill_on_drop: false }`
[INFO] [stdout] adc14f38ea1a9c94ecdcc804b79223573de14d54f767653f475f9117053155e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a55d8175be8dc764183b834188b616edc7f74e9fb9683dd31f17e89b9834ae2a
[INFO] running `Command { std: "docker" "start" "-a" "a55d8175be8dc764183b834188b616edc7f74e9fb9683dd31f17e89b9834ae2a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.58s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/library_core-f97799610ee61a99
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/library_core-b21926b1d91dfb8d
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests library_core
[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] [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" "a55d8175be8dc764183b834188b616edc7f74e9fb9683dd31f17e89b9834ae2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a55d8175be8dc764183b834188b616edc7f74e9fb9683dd31f17e89b9834ae2a", kill_on_drop: false }`
[INFO] [stdout] a55d8175be8dc764183b834188b616edc7f74e9fb9683dd31f17e89b9834ae2a