[INFO] updating cached repository https://github.com/stallmanifold/ring-buffer
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 425e612aeea37aeb020ccf3c03d9a66765e92ede
[INFO] testing stallmanifold/ring-buffer against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstallmanifold%2Fring-buffer" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stallmanifold/ring-buffer on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[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 work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/stallmanifold/ring-buffer already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 15976da3f727e08e330c060bfbf2f66bcc9cbc03222e01dd84353cbd6b1dd405
[INFO] running `"docker" "start" "-a" "15976da3f727e08e330c060bfbf2f66bcc9cbc03222e01dd84353cbd6b1dd405"`
[INFO] [stderr]    Compiling ring-buffer v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "15976da3f727e08e330c060bfbf2f66bcc9cbc03222e01dd84353cbd6b1dd405"`
[INFO] running `"docker" "rm" "-f" "15976da3f727e08e330c060bfbf2f66bcc9cbc03222e01dd84353cbd6b1dd405"`
[INFO] [stdout] 15976da3f727e08e330c060bfbf2f66bcc9cbc03222e01dd84353cbd6b1dd405
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 54056f1149fe68d8cff4663613f43bd1d4ad34c9c63f8e07ab545ae237ba1249
[INFO] running `"docker" "start" "-a" "54056f1149fe68d8cff4663613f43bd1d4ad34c9c63f8e07ab545ae237ba1249"`
[INFO] [stderr]    Compiling ring-buffer v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `"docker" "inspect" "54056f1149fe68d8cff4663613f43bd1d4ad34c9c63f8e07ab545ae237ba1249"`
[INFO] running `"docker" "rm" "-f" "54056f1149fe68d8cff4663613f43bd1d4ad34c9c63f8e07ab545ae237ba1249"`
[INFO] [stdout] 54056f1149fe68d8cff4663613f43bd1d4ad34c9c63f8e07ab545ae237ba1249
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 326b5fe53babb2f1d544b6cbfcbe2e1ba5e0215362d5d393f8c3840be02c0b1f
[INFO] running `"docker" "start" "-a" "326b5fe53babb2f1d544b6cbfcbe2e1ba5e0215362d5d393f8c3840be02c0b1f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/ring_buffer-6d516764a12e62f2
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test rotate_tests::ring_buffer_rotate_should_unwrap_end ... ok
[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] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/ring_buffer-d0d666fcbb14dbc9
[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_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_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_extract_after_extract_should_yield_same_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_correctly_extract_data_after_multiple_cycles ... ok
[INFO] [stdout] test ring_buffer_should_have_capacity_equal_to_underlying_storage_size ... 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_should_be_empty_after_clear ... ok
[INFO] [stdout] test ring_buffer_with_string_equal_to_length_in_bytes_should_be_full ... ok
[INFO] [stdout] test ring_buffer_string_longer_than_buffer_length_should_wrap_around ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "326b5fe53babb2f1d544b6cbfcbe2e1ba5e0215362d5d393f8c3840be02c0b1f"`
[INFO] running `"docker" "rm" "-f" "326b5fe53babb2f1d544b6cbfcbe2e1ba5e0215362d5d393f8c3840be02c0b1f"`
[INFO] [stdout] 326b5fe53babb2f1d544b6cbfcbe2e1ba5e0215362d5d393f8c3840be02c0b1f