[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 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstallmanifold%2Fring-buffer" "/workspace/builds/worker-48/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-48/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stallmanifold/ring-buffer on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-48/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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5e81a32a4c03e350d42da0f278961072d83ac5adb2d59aaaf05d2f955b6718a
[INFO] running `Command { std: "docker" "start" "-a" "f5e81a32a4c03e350d42da0f278961072d83ac5adb2d59aaaf05d2f955b6718a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5e81a32a4c03e350d42da0f278961072d83ac5adb2d59aaaf05d2f955b6718a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5e81a32a4c03e350d42da0f278961072d83ac5adb2d59aaaf05d2f955b6718a", kill_on_drop: false }`
[INFO] [stdout] f5e81a32a4c03e350d42da0f278961072d83ac5adb2d59aaaf05d2f955b6718a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53ad3357751b41907e6abb43f2e361f209fa2985aff1abe11c0c7ab7e6894f8a
[INFO] running `Command { std: "docker" "start" "-a" "53ad3357751b41907e6abb43f2e361f209fa2985aff1abe11c0c7ab7e6894f8a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling ring-buffer v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.24s
[INFO] running `Command { std: "docker" "inspect" "53ad3357751b41907e6abb43f2e361f209fa2985aff1abe11c0c7ab7e6894f8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53ad3357751b41907e6abb43f2e361f209fa2985aff1abe11c0c7ab7e6894f8a", kill_on_drop: false }`
[INFO] [stdout] 53ad3357751b41907e6abb43f2e361f209fa2985aff1abe11c0c7ab7e6894f8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12344e089194125319b2d4e0205ee8476e5fe1af6cf2dd024809cfd16e847d3e
[INFO] running `Command { std: "docker" "start" "-a" "12344e089194125319b2d4e0205ee8476e5fe1af6cf2dd024809cfd16e847d3e", kill_on_drop: false }`
[INFO] [stderr]    Compiling ring-buffer v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "12344e089194125319b2d4e0205ee8476e5fe1af6cf2dd024809cfd16e847d3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12344e089194125319b2d4e0205ee8476e5fe1af6cf2dd024809cfd16e847d3e", kill_on_drop: false }`
[INFO] [stdout] 12344e089194125319b2d4e0205ee8476e5fe1af6cf2dd024809cfd16e847d3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-48/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 149f445115b69491e6202f7da80e932be1f516a2b7a16619af1a8fe46f530746
[INFO] running `Command { std: "docker" "start" "-a" "149f445115b69491e6202f7da80e932be1f516a2b7a16619af1a8fe46f530746", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/ring_buffer-14bbb081b6954bd5)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stderr]      Running tests/ring_buffer.rs (/opt/rustwide/target/debug/deps/ring_buffer-0e79d22562155e4c)
[INFO] [stdout] test rotate_tests::ring_buffer_rotate_should_unwrap_buffer ... ok
[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_should_be_empty ... ok
[INFO] [stdout] test empty_ring_buffer_should_have_length_zero ... ok
[INFO] [stdout] test filled_ring_buffer_should_have_no_space_remaining ... 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_extract_after_extract_should_yield_same_string ... ok
[INFO] [stdout] test ring_buffer_extract_after_clear_should_be_empty_string ... 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_should_correctly_extract_data_after_multiple_cycles ... ok
[INFO] [stdout] test ring_buffer_should_have_capacity_equal_to_underlying_storage_size ... ok
[INFO] [stdout] test empty_ring_buffer_extract_should_be_empty_slice ... ok
[INFO] [stdout] test ring_buffer_containing_data_should_not_be_empty ... 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] test ring_buffer_should_only_contain_the_last_buffer_length_number_of_bytes_put_into_it ... 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" "149f445115b69491e6202f7da80e932be1f516a2b7a16619af1a8fe46f530746", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "149f445115b69491e6202f7da80e932be1f516a2b7a16619af1a8fe46f530746", kill_on_drop: false }`
[INFO] [stdout] 149f445115b69491e6202f7da80e932be1f516a2b7a16619af1a8fe46f530746