[INFO] fetching crate topological-sort 0.1.0...
[INFO] testing topological-sort-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate topological-sort 0.1.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate topological-sort 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 topological-sort 0.1.0
[INFO] finished tweaking crates.io crate topological-sort 0.1.0
[INFO] tweaked toml for crates.io crate topological-sort 0.1.0 written to /workspace/builds/worker-12/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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 113a1aeeac17d89760fab9aaf1cdef19421ffdb027692246f7e9b3d9f0530065
[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" "113a1aeeac17d89760fab9aaf1cdef19421ffdb027692246f7e9b3d9f0530065", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "113a1aeeac17d89760fab9aaf1cdef19421ffdb027692246f7e9b3d9f0530065", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "113a1aeeac17d89760fab9aaf1cdef19421ffdb027692246f7e9b3d9f0530065", kill_on_drop: false }`
[INFO] [stdout] 113a1aeeac17d89760fab9aaf1cdef19421ffdb027692246f7e9b3d9f0530065
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 4d0c8cd81838d34741f4d991dda0e53f205964e35a55d3b5e0b66cf11fab8af7
[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" "4d0c8cd81838d34741f4d991dda0e53f205964e35a55d3b5e0b66cf11fab8af7", kill_on_drop: false }`
[INFO] [stderr]    Compiling topological-sort v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "4d0c8cd81838d34741f4d991dda0e53f205964e35a55d3b5e0b66cf11fab8af7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d0c8cd81838d34741f4d991dda0e53f205964e35a55d3b5e0b66cf11fab8af7", kill_on_drop: false }`
[INFO] [stdout] 4d0c8cd81838d34741f4d991dda0e53f205964e35a55d3b5e0b66cf11fab8af7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 11beb60ec36c9506a3d6150d41cf0767b1d7a57b9e09889ff13bb9bb1ea70f88
[INFO] running `Command { std: "docker" "start" "-a" "11beb60ec36c9506a3d6150d41cf0767b1d7a57b9e09889ff13bb9bb1ea70f88", kill_on_drop: false }`
[INFO] [stderr]    Compiling topological-sort v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.64s
[INFO] running `Command { std: "docker" "inspect" "11beb60ec36c9506a3d6150d41cf0767b1d7a57b9e09889ff13bb9bb1ea70f88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11beb60ec36c9506a3d6150d41cf0767b1d7a57b9e09889ff13bb9bb1ea70f88", kill_on_drop: false }`
[INFO] [stdout] 11beb60ec36c9506a3d6150d41cf0767b1d7a57b9e09889ff13bb9bb1ea70f88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 19a16255d95fd4584f2eeaa6552641b860287995ccb3c3f6819d5c4c04e45fc7
[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" "19a16255d95fd4584f2eeaa6552641b860287995ccb3c3f6819d5c4c04e45fc7", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/topological_sort-371cbc3f1be5d084
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test test::cyclic_deadlock ... ok
[INFO] [stdout] test test::pop_all ... ok
[INFO] [stdout] test test::from_iter ... ok
[INFO] [stdout] test test::iter ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests topological-sort
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - TopologicalSort<T>::new (line 66) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "19a16255d95fd4584f2eeaa6552641b860287995ccb3c3f6819d5c4c04e45fc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19a16255d95fd4584f2eeaa6552641b860287995ccb3c3f6819d5c4c04e45fc7", kill_on_drop: false }`
[INFO] [stdout] 19a16255d95fd4584f2eeaa6552641b860287995ccb3c3f6819d5c4c04e45fc7