[INFO] fetching crate string-builder 0.2.0...
[INFO] testing string-builder-0.2.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate string-builder 0.2.0 into /workspace/builds/worker-55/source
[INFO] validating manifest of crates.io crate string-builder 0.2.0 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 string-builder 0.2.0
[INFO] finished tweaking crates.io crate string-builder 0.2.0
[INFO] tweaked toml for crates.io crate string-builder 0.2.0 written to /workspace/builds/worker-55/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-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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] e9b32c970e7d7ee4ba97bc606c13bd7669d24b3db463d1e02f196d14e5bc6b3c
[INFO] running `Command { std: "docker" "start" "-a" "e9b32c970e7d7ee4ba97bc606c13bd7669d24b3db463d1e02f196d14e5bc6b3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9b32c970e7d7ee4ba97bc606c13bd7669d24b3db463d1e02f196d14e5bc6b3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9b32c970e7d7ee4ba97bc606c13bd7669d24b3db463d1e02f196d14e5bc6b3c", kill_on_drop: false }`
[INFO] [stdout] e9b32c970e7d7ee4ba97bc606c13bd7669d24b3db463d1e02f196d14e5bc6b3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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] a29224e49341db83a4628a996de0e12ab4e826af59b0bbe47b600a8d84724aad
[INFO] running `Command { std: "docker" "start" "-a" "a29224e49341db83a4628a996de0e12ab4e826af59b0bbe47b600a8d84724aad", kill_on_drop: false }`
[INFO] [stderr]    Compiling string-builder v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "a29224e49341db83a4628a996de0e12ab4e826af59b0bbe47b600a8d84724aad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a29224e49341db83a4628a996de0e12ab4e826af59b0bbe47b600a8d84724aad", kill_on_drop: false }`
[INFO] [stdout] a29224e49341db83a4628a996de0e12ab4e826af59b0bbe47b600a8d84724aad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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] 89734c1ef36a035c576aeac07355df80b8eb0c3f100b4add37c24ebe5dec47c0
[INFO] running `Command { std: "docker" "start" "-a" "89734c1ef36a035c576aeac07355df80b8eb0c3f100b4add37c24ebe5dec47c0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling string-builder v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.52s
[INFO] running `Command { std: "docker" "inspect" "89734c1ef36a035c576aeac07355df80b8eb0c3f100b4add37c24ebe5dec47c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89734c1ef36a035c576aeac07355df80b8eb0c3f100b4add37c24ebe5dec47c0", kill_on_drop: false }`
[INFO] [stdout] 89734c1ef36a035c576aeac07355df80b8eb0c3f100b4add37c24ebe5dec47c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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] de233f3830d57167b5d7530d0a5141965feacad8ce1fc5436824bf6ae52c610d
[INFO] running `Command { std: "docker" "start" "-a" "de233f3830d57167b5d7530d0a5141965feacad8ce1fc5436824bf6ae52c610d", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/string_builder-536d6659bbd2a1aa)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::test_all_supported_types ... ok
[INFO] [stdout] test tests::test_individual_unicode_characters ... ok
[INFO] [stdout] test tests::test_tool_album ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests string-builder
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - Builder::string (line 60) ... ok
[INFO] [stdout] test src/lib.rs - Builder::append (line 30) ... ok
[INFO] [stdout] test src/lib.rs - Builder::len (line 44) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.48s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "de233f3830d57167b5d7530d0a5141965feacad8ce1fc5436824bf6ae52c610d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de233f3830d57167b5d7530d0a5141965feacad8ce1fc5436824bf6ae52c610d", kill_on_drop: false }`
[INFO] [stdout] de233f3830d57167b5d7530d0a5141965feacad8ce1fc5436824bf6ae52c610d