[INFO] fetching crate alternate_buffer 0.1.0...
[INFO] testing alternate_buffer-0.1.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate alternate_buffer 0.1.0 into /workspace/builds/worker-28/source
[INFO] validating manifest of crates.io crate alternate_buffer 0.1.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alternate_buffer 0.1.0
[INFO] finished tweaking crates.io crate alternate_buffer 0.1.0
[INFO] tweaked toml for crates.io crate alternate_buffer 0.1.0 written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] abc8b8b08a38d0a40bfde18c877834863e44f5eec61ec6254088ddbcb47076a5
[INFO] running `Command { std: "docker" "start" "-a" "abc8b8b08a38d0a40bfde18c877834863e44f5eec61ec6254088ddbcb47076a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abc8b8b08a38d0a40bfde18c877834863e44f5eec61ec6254088ddbcb47076a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abc8b8b08a38d0a40bfde18c877834863e44f5eec61ec6254088ddbcb47076a5", kill_on_drop: false }`
[INFO] [stdout] abc8b8b08a38d0a40bfde18c877834863e44f5eec61ec6254088ddbcb47076a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b051c336706278ae1f43b3244b8a9f4ee4b478554d59cf7838e854c6346c40bc
[INFO] running `Command { std: "docker" "start" "-a" "b051c336706278ae1f43b3244b8a9f4ee4b478554d59cf7838e854c6346c40bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling alternate_buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `Command { std: "docker" "inspect" "b051c336706278ae1f43b3244b8a9f4ee4b478554d59cf7838e854c6346c40bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b051c336706278ae1f43b3244b8a9f4ee4b478554d59cf7838e854c6346c40bc", kill_on_drop: false }`
[INFO] [stdout] b051c336706278ae1f43b3244b8a9f4ee4b478554d59cf7838e854c6346c40bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd45665022d390ec4da1b6a8f67377f2c400f24f7351c2a7eed4c2f69e65ca7c
[INFO] running `Command { std: "docker" "start" "-a" "dd45665022d390ec4da1b6a8f67377f2c400f24f7351c2a7eed4c2f69e65ca7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling alternate_buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "dd45665022d390ec4da1b6a8f67377f2c400f24f7351c2a7eed4c2f69e65ca7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd45665022d390ec4da1b6a8f67377f2c400f24f7351c2a7eed4c2f69e65ca7c", kill_on_drop: false }`
[INFO] [stdout] dd45665022d390ec4da1b6a8f67377f2c400f24f7351c2a7eed4c2f69e65ca7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 71d181efb231c83ec1cab3cea52723fea8c3ebfa46c0a5f9e3998792cc48bfeb
[INFO] running `Command { std: "docker" "start" "-a" "71d181efb231c83ec1cab3cea52723fea8c3ebfa46c0a5f9e3998792cc48bfeb", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/alternate_buffer-7dfb88ce593711a5)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/alternate_buffer-f2a963f980cf8b3c)
[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] [stderr]    Doc-tests alternate_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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 5) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.20s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "71d181efb231c83ec1cab3cea52723fea8c3ebfa46c0a5f9e3998792cc48bfeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71d181efb231c83ec1cab3cea52723fea8c3ebfa46c0a5f9e3998792cc48bfeb", kill_on_drop: false }`
[INFO] [stdout] 71d181efb231c83ec1cab3cea52723fea8c3ebfa46c0a5f9e3998792cc48bfeb