[INFO] fetching crate vmcircbuf 0.2.8...
[INFO] testing vmcircbuf-0.2.8 against 1.55.0 for beta-1.56-1
[INFO] extracting crate vmcircbuf 0.2.8 into /workspace/builds/worker-43/source
[INFO] validating manifest of crates.io crate vmcircbuf 0.2.8 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 crates.io crate vmcircbuf 0.2.8
[INFO] finished tweaking crates.io crate vmcircbuf 0.2.8
[INFO] tweaked toml for crates.io crate vmcircbuf 0.2.8 written to /workspace/builds/worker-43/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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] 7e3f018eb7a4426267b648e499f212b9735de042bffa987d4ffe5550d42caee4
[INFO] running `Command { std: "docker" "start" "-a" "7e3f018eb7a4426267b648e499f212b9735de042bffa987d4ffe5550d42caee4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e3f018eb7a4426267b648e499f212b9735de042bffa987d4ffe5550d42caee4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e3f018eb7a4426267b648e499f212b9735de042bffa987d4ffe5550d42caee4", kill_on_drop: false }`
[INFO] [stdout] 7e3f018eb7a4426267b648e499f212b9735de042bffa987d4ffe5550d42caee4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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] e98b1542fcc7b4909be5c2a87c455f1d1d9dbb0f70be6a43596b82e33a4763b8
[INFO] running `Command { std: "docker" "start" "-a" "e98b1542fcc7b4909be5c2a87c455f1d1d9dbb0f70be6a43596b82e33a4763b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling vmcircbuf v0.2.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "e98b1542fcc7b4909be5c2a87c455f1d1d9dbb0f70be6a43596b82e33a4763b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e98b1542fcc7b4909be5c2a87c455f1d1d9dbb0f70be6a43596b82e33a4763b8", kill_on_drop: false }`
[INFO] [stdout] e98b1542fcc7b4909be5c2a87c455f1d1d9dbb0f70be6a43596b82e33a4763b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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] fffa165424529c0c67f58e3733688122058c7c026ef79c59509f3719dc7fc286
[INFO] running `Command { std: "docker" "start" "-a" "fffa165424529c0c67f58e3733688122058c7c026ef79c59509f3719dc7fc286", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling vmcircbuf v0.2.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "fffa165424529c0c67f58e3733688122058c7c026ef79c59509f3719dc7fc286", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fffa165424529c0c67f58e3733688122058c7c026ef79c59509f3719dc7fc286", kill_on_drop: false }`
[INFO] [stdout] fffa165424529c0c67f58e3733688122058c7c026ef79c59509f3719dc7fc286
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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] 0fae8b69af2f1f0150ffe438efb52a899a0b94ecf72f75672972505a65c68e75
[INFO] running `Command { std: "docker" "start" "-a" "0fae8b69af2f1f0150ffe438efb52a899a0b94ecf72f75672972505a65c68e75", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/vmcircbuf-b819f7b7be2d24f3)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test buffer::tests::wrap ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests vmcircbuf
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/buffer.rs - buffer::Buffer (line 23) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.26s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0fae8b69af2f1f0150ffe438efb52a899a0b94ecf72f75672972505a65c68e75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fae8b69af2f1f0150ffe438efb52a899a0b94ecf72f75672972505a65c68e75", kill_on_drop: false }`
[INFO] [stdout] 0fae8b69af2f1f0150ffe438efb52a899a0b94ecf72f75672972505a65c68e75