[INFO] fetching crate cribbage-core 0.1.1...
[INFO] testing cribbage-core-0.1.1 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate cribbage-core 0.1.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate cribbage-core 0.1.1 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 cribbage-core 0.1.1
[INFO] finished tweaking crates.io crate cribbage-core 0.1.1
[INFO] tweaked toml for crates.io crate cribbage-core 0.1.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate cribbage-core 0.1.1 already has a lockfile, it will not be regenerated
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f86d89e059dcec9693caf4f679ba62d21f5c3ab6d5919218a532441e956559c4
[INFO] running `Command { std: "docker" "start" "-a" "f86d89e059dcec9693caf4f679ba62d21f5c3ab6d5919218a532441e956559c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f86d89e059dcec9693caf4f679ba62d21f5c3ab6d5919218a532441e956559c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f86d89e059dcec9693caf4f679ba62d21f5c3ab6d5919218a532441e956559c4", kill_on_drop: false }`
[INFO] [stdout] f86d89e059dcec9693caf4f679ba62d21f5c3ab6d5919218a532441e956559c4
[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] [stdout] 5b57e35580e84e2909e268837497f913429edbaf5a8d846a3a77068b6b6e3225
[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" "5b57e35580e84e2909e268837497f913429edbaf5a8d846a3a77068b6b6e3225", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling cribbage-core v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.11s
[INFO] running `Command { std: "docker" "inspect" "5b57e35580e84e2909e268837497f913429edbaf5a8d846a3a77068b6b6e3225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b57e35580e84e2909e268837497f913429edbaf5a8d846a3a77068b6b6e3225", kill_on_drop: false }`
[INFO] [stdout] 5b57e35580e84e2909e268837497f913429edbaf5a8d846a3a77068b6b6e3225
[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] c9a4003e6205438fb3589d6cf549b76565fe0c154f8d5052cf36bf37ba29394d
[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" "c9a4003e6205438fb3589d6cf549b76565fe0c154f8d5052cf36bf37ba29394d", kill_on_drop: false }`
[INFO] [stderr]    Compiling cribbage-core v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.71s
[INFO] running `Command { std: "docker" "inspect" "c9a4003e6205438fb3589d6cf549b76565fe0c154f8d5052cf36bf37ba29394d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9a4003e6205438fb3589d6cf549b76565fe0c154f8d5052cf36bf37ba29394d", kill_on_drop: false }`
[INFO] [stdout] c9a4003e6205438fb3589d6cf549b76565fe0c154f8d5052cf36bf37ba29394d
[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] [stdout] 7bedf45a58b9fcb53d15ca0ab29db46a6505f45fdbc2f8326f5cf11f0a38076a
[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" "7bedf45a58b9fcb53d15ca0ab29db46a6505f45fdbc2f8326f5cf11f0a38076a", 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/cribbage_core-535ed02ad1dd776a
[INFO] [stdout] running 14 tests
[INFO] [stderr] 
[INFO] [stdout] test board::tests::test_three_player_board ... ok
[INFO] [stderr] thread 'card::test::test_card_to_string' has overflowed its stack
[INFO] [stdout] test deck::tests::test_new ... ok
[INFO] [stderr] fatal runtime error: stack overflow
[INFO] [stdout] test deck::tests::test_new_shuffle ... ok
[INFO] [stdout] test deck::tests::test_draw_n ... ok
[INFO] [stdout] test board::tests::test_four_player_board ... ok
[INFO] [stdout] test card::test::test_rank_to_string ... ok
[INFO] [stderr] error: test failed, to rerun pass '--lib'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/deps/cribbage_core-535ed02ad1dd776a` (signal: 6, SIGABRT: process abort signal)
[INFO] running `Command { std: "docker" "inspect" "7bedf45a58b9fcb53d15ca0ab29db46a6505f45fdbc2f8326f5cf11f0a38076a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bedf45a58b9fcb53d15ca0ab29db46a6505f45fdbc2f8326f5cf11f0a38076a", kill_on_drop: false }`
[INFO] [stdout] 7bedf45a58b9fcb53d15ca0ab29db46a6505f45fdbc2f8326f5cf11f0a38076a