[INFO] fetching crate immutable_string 0.1.1...
[INFO] testing immutable_string-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate immutable_string 0.1.1 into /workspace/builds/worker-77/source
[INFO] validating manifest of crates.io crate immutable_string 0.1.1 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 immutable_string 0.1.1
[INFO] finished tweaking crates.io crate immutable_string 0.1.1
[INFO] tweaked toml for crates.io crate immutable_string 0.1.1 written to /workspace/builds/worker-77/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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] 09b29b7584d524dcae56fd1f0dba94df08401ef2753f1638ef60556f32be2777
[INFO] running `Command { std: "docker" "start" "-a" "09b29b7584d524dcae56fd1f0dba94df08401ef2753f1638ef60556f32be2777", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09b29b7584d524dcae56fd1f0dba94df08401ef2753f1638ef60556f32be2777", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09b29b7584d524dcae56fd1f0dba94df08401ef2753f1638ef60556f32be2777", kill_on_drop: false }`
[INFO] [stdout] 09b29b7584d524dcae56fd1f0dba94df08401ef2753f1638ef60556f32be2777
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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] 6851f7036926fcee1eb24b39d0eb021807c5354ce1b8290f0a407fe5f0301b26
[INFO] running `Command { std: "docker" "start" "-a" "6851f7036926fcee1eb24b39d0eb021807c5354ce1b8290f0a407fe5f0301b26", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling weak-table v0.3.0
[INFO] [stderr]    Compiling immutable_string v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "6851f7036926fcee1eb24b39d0eb021807c5354ce1b8290f0a407fe5f0301b26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6851f7036926fcee1eb24b39d0eb021807c5354ce1b8290f0a407fe5f0301b26", kill_on_drop: false }`
[INFO] [stdout] 6851f7036926fcee1eb24b39d0eb021807c5354ce1b8290f0a407fe5f0301b26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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] b725c68c6813e217baa57906ed9745f898ba3889f54fca7b8ccc65da792cc307
[INFO] running `Command { std: "docker" "start" "-a" "b725c68c6813e217baa57906ed9745f898ba3889f54fca7b8ccc65da792cc307", kill_on_drop: false }`
[INFO] [stderr]    Compiling immutable_string v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "b725c68c6813e217baa57906ed9745f898ba3889f54fca7b8ccc65da792cc307", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b725c68c6813e217baa57906ed9745f898ba3889f54fca7b8ccc65da792cc307", kill_on_drop: false }`
[INFO] [stdout] b725c68c6813e217baa57906ed9745f898ba3889f54fca7b8ccc65da792cc307
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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] c7ea141da03313d9bde38b89b6c675e1cb523048913342f4ee9c87106ebb7869
[INFO] running `Command { std: "docker" "start" "-a" "c7ea141da03313d9bde38b89b6c675e1cb523048913342f4ee9c87106ebb7869", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/immutable_string-3a2bf8cc05660fbf)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::display ... ok
[INFO] [stdout] test tests::two_insertion_sharing ... ok
[INFO] [stdout] test tests::iter_collect ... 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 immutable_string
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - ImmutableString::use_count (line 37) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.67s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c7ea141da03313d9bde38b89b6c675e1cb523048913342f4ee9c87106ebb7869", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7ea141da03313d9bde38b89b6c675e1cb523048913342f4ee9c87106ebb7869", kill_on_drop: false }`
[INFO] [stdout] c7ea141da03313d9bde38b89b6c675e1cb523048913342f4ee9c87106ebb7869