[INFO] fetching crate river-ring-buffer 1.0.0...
[INFO] testing river-ring-buffer-1.0.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate river-ring-buffer 1.0.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate river-ring-buffer 1.0.0
[INFO] finished tweaking crates.io crate river-ring-buffer 1.0.0
[INFO] tweaked toml for crates.io crate river-ring-buffer 1.0.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate river-ring-buffer 1.0.0 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 91a7b21b5080a164ed886a4ab1d0d7b0519935be2832fbc7fb8f132ea51037d0
[INFO] running `Command { std: "docker" "start" "-a" "91a7b21b5080a164ed886a4ab1d0d7b0519935be2832fbc7fb8f132ea51037d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91a7b21b5080a164ed886a4ab1d0d7b0519935be2832fbc7fb8f132ea51037d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91a7b21b5080a164ed886a4ab1d0d7b0519935be2832fbc7fb8f132ea51037d0", kill_on_drop: false }`
[INFO] [stdout] 91a7b21b5080a164ed886a4ab1d0d7b0519935be2832fbc7fb8f132ea51037d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 37bbe363140d83082c826e4e3a0c5ba84da83977037747531ac0e92079d1abdf
[INFO] running `Command { std: "docker" "start" "-a" "37bbe363140d83082c826e4e3a0c5ba84da83977037747531ac0e92079d1abdf", kill_on_drop: false }`
[INFO] [stderr]    Compiling river-ring-buffer v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "37bbe363140d83082c826e4e3a0c5ba84da83977037747531ac0e92079d1abdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37bbe363140d83082c826e4e3a0c5ba84da83977037747531ac0e92079d1abdf", kill_on_drop: false }`
[INFO] [stdout] 37bbe363140d83082c826e4e3a0c5ba84da83977037747531ac0e92079d1abdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f1e7571d82792ea61d100c236842cc06172105b46ed5982ed3cd1f31e949688
[INFO] running `Command { std: "docker" "start" "-a" "4f1e7571d82792ea61d100c236842cc06172105b46ed5982ed3cd1f31e949688", kill_on_drop: false }`
[INFO] [stderr]    Compiling river-ring-buffer v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.18s
[INFO] running `Command { std: "docker" "inspect" "4f1e7571d82792ea61d100c236842cc06172105b46ed5982ed3cd1f31e949688", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f1e7571d82792ea61d100c236842cc06172105b46ed5982ed3cd1f31e949688", kill_on_drop: false }`
[INFO] [stdout] 4f1e7571d82792ea61d100c236842cc06172105b46ed5982ed3cd1f31e949688
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4865d56bebdb4b90603217fd28114a8ccf7591ab432f9948eb53c9f302c61feb
[INFO] running `Command { std: "docker" "start" "-a" "4865d56bebdb4b90603217fd28114a8ccf7591ab432f9948eb53c9f302c61feb", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/river_ring_buffer-323376b4e043173c)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::it_overwrites_oldest_value_when_buffer_is_full ... ok
[INFO] [stdout] test tests::it_returns_error_when_buffer_is_full ... ok
[INFO] [stdout] test tests::it_returns_none_when_ring_buffer_empty ... ok
[INFO] [stdout] test tests::it_returns_values_in_fifo_order ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests river_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" "4865d56bebdb4b90603217fd28114a8ccf7591ab432f9948eb53c9f302c61feb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4865d56bebdb4b90603217fd28114a8ccf7591ab432f9948eb53c9f302c61feb", kill_on_drop: false }`
[INFO] [stdout] 4865d56bebdb4b90603217fd28114a8ccf7591ab432f9948eb53c9f302c61feb