[INFO] fetching crate command-builder 0.2.0...
[INFO] testing command-builder-0.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate command-builder 0.2.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate command-builder 0.2.0 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 command-builder 0.2.0
[INFO] finished tweaking crates.io crate command-builder 0.2.0
[INFO] tweaked toml for crates.io crate command-builder 0.2.0 written to /workspace/builds/worker-1/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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] f3e5f0c40caef58cde134279da54933e60caff5e9acdbaf28c299d80852823dc
[INFO] running `Command { std: "docker" "start" "-a" "f3e5f0c40caef58cde134279da54933e60caff5e9acdbaf28c299d80852823dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3e5f0c40caef58cde134279da54933e60caff5e9acdbaf28c299d80852823dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3e5f0c40caef58cde134279da54933e60caff5e9acdbaf28c299d80852823dc", kill_on_drop: false }`
[INFO] [stdout] f3e5f0c40caef58cde134279da54933e60caff5e9acdbaf28c299d80852823dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 8829efdf419b8be84be0d722128cd6747c664726fc25b10a4afa6f1fee9139e9
[INFO] running `Command { std: "docker" "start" "-a" "8829efdf419b8be84be0d722128cd6747c664726fc25b10a4afa6f1fee9139e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling command-builder v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "8829efdf419b8be84be0d722128cd6747c664726fc25b10a4afa6f1fee9139e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8829efdf419b8be84be0d722128cd6747c664726fc25b10a4afa6f1fee9139e9", kill_on_drop: false }`
[INFO] [stdout] 8829efdf419b8be84be0d722128cd6747c664726fc25b10a4afa6f1fee9139e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] e291ac32b05e67bf8e4ddf736ffa4991e04bebb31c4b60c4c7d7ea2d1a4f982b
[INFO] running `Command { std: "docker" "start" "-a" "e291ac32b05e67bf8e4ddf736ffa4991e04bebb31c4b60c4c7d7ea2d1a4f982b", kill_on_drop: false }`
[INFO] [stderr]    Compiling command-builder v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `a` found for struct `Single` in the current scope
[INFO] [stdout]    --> src/lib.rs:8:14
[INFO] [stdout]     |
[INFO] [stdout] 8   |             .a("foo\nbar\nbaz")
[INFO] [stdout]     |              ^ method not found in `Single`
[INFO] [stdout] ...
[INFO] [stdout] 453 | pub struct Single(Vec<String>);
[INFO] [stdout]     | ------------------------------- method `a` not found for this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `a` found for struct `Single` in the current scope
[INFO] [stdout]    --> src/lib.rs:9:39
[INFO] [stdout]     |
[INFO] [stdout] 9   |             .pipe(Single::new("grep").a("bar"));
[INFO] [stdout]     |                                       ^ method not found in `Single`
[INFO] [stdout] ...
[INFO] [stdout] 453 | pub struct Single(Vec<String>);
[INFO] [stdout]     | ------------------------------- method `a` not found for this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `command-builder` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "e291ac32b05e67bf8e4ddf736ffa4991e04bebb31c4b60c4c7d7ea2d1a4f982b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e291ac32b05e67bf8e4ddf736ffa4991e04bebb31c4b60c4c7d7ea2d1a4f982b", kill_on_drop: false }`
[INFO] [stdout] e291ac32b05e67bf8e4ddf736ffa4991e04bebb31c4b60c4c7d7ea2d1a4f982b