[INFO] fetching crate river-ring-buffer 1.0.0...
[INFO] testing river-ring-buffer-1.0.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate river-ring-buffer 1.0.0 into /workspace/builds/worker-2-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-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate river-ring-buffer 1.0.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ef85c0e4b5714203c106ca12ac82786b6add9ceff4783a7e5a73fd1b45c2e23
[INFO] running `Command { std: "docker" "start" "-a" "9ef85c0e4b5714203c106ca12ac82786b6add9ceff4783a7e5a73fd1b45c2e23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ef85c0e4b5714203c106ca12ac82786b6add9ceff4783a7e5a73fd1b45c2e23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ef85c0e4b5714203c106ca12ac82786b6add9ceff4783a7e5a73fd1b45c2e23", kill_on_drop: false }`
[INFO] [stdout] 9ef85c0e4b5714203c106ca12ac82786b6add9ceff4783a7e5a73fd1b45c2e23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3ec07a55b10ab62e7df15a4669d5fb42e0e74da9b99d61083a06541566ddbcf
[INFO] running `Command { std: "docker" "start" "-a" "f3ec07a55b10ab62e7df15a4669d5fb42e0e74da9b99d61083a06541566ddbcf", 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 0.18s
[INFO] running `Command { std: "docker" "inspect" "f3ec07a55b10ab62e7df15a4669d5fb42e0e74da9b99d61083a06541566ddbcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3ec07a55b10ab62e7df15a4669d5fb42e0e74da9b99d61083a06541566ddbcf", kill_on_drop: false }`
[INFO] [stdout] f3ec07a55b10ab62e7df15a4669d5fb42e0e74da9b99d61083a06541566ddbcf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ecf09a081affd6382f752bd13eb480840cef99ea42889fd18f13eb430b7ae4c9
[INFO] running `Command { std: "docker" "start" "-a" "ecf09a081affd6382f752bd13eb480840cef99ea42889fd18f13eb430b7ae4c9", 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 0.53s
[INFO] running `Command { std: "docker" "inspect" "ecf09a081affd6382f752bd13eb480840cef99ea42889fd18f13eb430b7ae4c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecf09a081affd6382f752bd13eb480840cef99ea42889fd18f13eb430b7ae4c9", kill_on_drop: false }`
[INFO] [stdout] ecf09a081affd6382f752bd13eb480840cef99ea42889fd18f13eb430b7ae4c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 726f79cd3516a5dc6181153b4e517679725c68046a6b6842088ed0a43770ca35
[INFO] running `Command { std: "docker" "start" "-a" "726f79cd3516a5dc6181153b4e517679725c68046a6b6842088ed0a43770ca35", 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-de758a3523a226b0)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[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_overwrites_oldest_value_when_buffer_is_full ... 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" "726f79cd3516a5dc6181153b4e517679725c68046a6b6842088ed0a43770ca35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "726f79cd3516a5dc6181153b4e517679725c68046a6b6842088ed0a43770ca35", kill_on_drop: false }`
[INFO] [stdout] 726f79cd3516a5dc6181153b4e517679725c68046a6b6842088ed0a43770ca35