[INFO] cloning repository https://github.com/stallmanifold/ring-buffer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stallmanifold/ring-buffer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstallmanifold%2Fring-buffer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstallmanifold%2Fring-buffer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 425e612aeea37aeb020ccf3c03d9a66765e92ede
[INFO] testing stallmanifold/ring-buffer against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstallmanifold%2Fring-buffer" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stallmanifold/ring-buffer on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/stallmanifold/ring-buffer
[INFO] finished tweaking git repo https://github.com/stallmanifold/ring-buffer
[INFO] tweaked toml for git repo https://github.com/stallmanifold/ring-buffer written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/stallmanifold/ring-buffer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a91b636980af3b526d2c8bc9c03973d55a3348e16ab6bcc7dff8b60fd046c0fc
[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" "a91b636980af3b526d2c8bc9c03973d55a3348e16ab6bcc7dff8b60fd046c0fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a91b636980af3b526d2c8bc9c03973d55a3348e16ab6bcc7dff8b60fd046c0fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a91b636980af3b526d2c8bc9c03973d55a3348e16ab6bcc7dff8b60fd046c0fc", kill_on_drop: false }`
[INFO] [stdout] a91b636980af3b526d2c8bc9c03973d55a3348e16ab6bcc7dff8b60fd046c0fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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] dda85c213b58d82d15113cb0bc99bda4fd114d08c3839874efff36ade1c8016e
[INFO] running `Command { std: "docker" "start" "-a" "dda85c213b58d82d15113cb0bc99bda4fd114d08c3839874efff36ade1c8016e", kill_on_drop: false }`
[INFO] [stderr]    Compiling ring-buffer v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "dda85c213b58d82d15113cb0bc99bda4fd114d08c3839874efff36ade1c8016e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dda85c213b58d82d15113cb0bc99bda4fd114d08c3839874efff36ade1c8016e", kill_on_drop: false }`
[INFO] [stdout] dda85c213b58d82d15113cb0bc99bda4fd114d08c3839874efff36ade1c8016e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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] 1e5d54f1a89c47a1660f47161739f00ff13075c84788650c123eefea524a8e70
[INFO] running `Command { std: "docker" "start" "-a" "1e5d54f1a89c47a1660f47161739f00ff13075c84788650c123eefea524a8e70", kill_on_drop: false }`
[INFO] [stderr]    Compiling ring-buffer v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "1e5d54f1a89c47a1660f47161739f00ff13075c84788650c123eefea524a8e70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e5d54f1a89c47a1660f47161739f00ff13075c84788650c123eefea524a8e70", kill_on_drop: false }`
[INFO] [stdout] 1e5d54f1a89c47a1660f47161739f00ff13075c84788650c123eefea524a8e70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e1f7e42140cfa854dbc29a752847c904e17289c046e0a824d3f474ed8678e2ff
[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" "e1f7e42140cfa854dbc29a752847c904e17289c046e0a824d3f474ed8678e2ff", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/ring_buffer-8c3db8df6f5629a2)
[INFO] [stdout] running 3 tests
[INFO] [stdout] test rotate_tests::ring_buffer_rotate_should_unwrap_buffer ... ok
[INFO] [stderr]      Running tests/ring_buffer.rs (/opt/rustwide/target/debug/deps/ring_buffer-1b3d432001b58edc)
[INFO] [stdout] test rotate_tests::ring_buffer_successive_rotate_operations_should_leave_internal_state_unchanged ... ok
[INFO] [stdout] test rotate_tests::ring_buffer_rotate_should_unwrap_end ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test empty_ring_buffer_extract_should_be_empty_slice ... ok
[INFO] [stdout] test empty_ring_buffer_should_have_length_zero ... ok
[INFO] [stdout] test empty_ring_buffer_should_be_empty ... ok
[INFO] [stdout] test empty_ring_buffer_should_have_maximum_space_remaining ... ok
[INFO] [stdout] test ring_buffer_containing_data_should_have_length_no_larger_than_capacity ... ok
[INFO] [stdout] test ring_buffer_containing_data_should_not_be_empty ... ok
[INFO] [stdout] test ring_buffer_extract_after_clear_should_be_empty_string ... ok
[INFO] [stdout] test ring_buffer_should_have_capacity_equal_to_underlying_storage_size ... ok
[INFO] [stdout] test ring_buffer_should_correctly_extract_data_after_multiple_cycles ... ok
[INFO] [stdout] test ring_buffer_extract_after_extract_should_yield_same_string ... ok
[INFO] [stdout] test filled_ring_buffer_should_have_no_space_remaining ... ok
[INFO] [stdout] test ring_buffer_should_only_contain_the_last_buffer_length_number_of_bytes_put_into_it ... ok
[INFO] [stdout] test ring_buffer_extracted_string_should_match_inserted_string_of_length_at_most_the_buffer_size ... ok
[INFO] [stdout] test ring_buffer_should_be_empty_after_clear ... ok
[INFO] [stdout] test ring_buffer_string_longer_than_buffer_length_should_wrap_around ... ok
[INFO] [stdout] test ring_buffer_with_string_equal_to_length_in_bytes_should_be_full ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests ring-buffer
[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" "e1f7e42140cfa854dbc29a752847c904e17289c046e0a824d3f474ed8678e2ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1f7e42140cfa854dbc29a752847c904e17289c046e0a824d3f474ed8678e2ff", kill_on_drop: false }`
[INFO] [stdout] e1f7e42140cfa854dbc29a752847c904e17289c046e0a824d3f474ed8678e2ff