[INFO] fetching crate libcnb 0.2.0...
[INFO] testing libcnb-0.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate libcnb 0.2.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate libcnb 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 libcnb 0.2.0
[INFO] finished tweaking crates.io crate libcnb 0.2.0
[INFO] tweaked toml for crates.io crate libcnb 0.2.0 written to /workspace/builds/worker-5/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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 581afc648c62ad35e1d9142ae264321730bd79c390a005ccf13b954c14e4f160
[INFO] running `Command { std: "docker" "start" "-a" "581afc648c62ad35e1d9142ae264321730bd79c390a005ccf13b954c14e4f160", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "581afc648c62ad35e1d9142ae264321730bd79c390a005ccf13b954c14e4f160", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "581afc648c62ad35e1d9142ae264321730bd79c390a005ccf13b954c14e4f160", kill_on_drop: false }`
[INFO] [stdout] 581afc648c62ad35e1d9142ae264321730bd79c390a005ccf13b954c14e4f160
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 124732299c238bfefdb8e33914dc7eb7eb856a2b00e07e1c6e3125cfae587e02
[INFO] running `Command { std: "docker" "start" "-a" "124732299c238bfefdb8e33914dc7eb7eb856a2b00e07e1c6e3125cfae587e02", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling libcnb v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.42s
[INFO] running `Command { std: "docker" "inspect" "124732299c238bfefdb8e33914dc7eb7eb856a2b00e07e1c6e3125cfae587e02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "124732299c238bfefdb8e33914dc7eb7eb856a2b00e07e1c6e3125cfae587e02", kill_on_drop: false }`
[INFO] [stdout] 124732299c238bfefdb8e33914dc7eb7eb856a2b00e07e1c6e3125cfae587e02
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 80778a17ed23f75c17b0e00b3a4246e4cd3ec0856bd445efe3e4b50d59db8879
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "80778a17ed23f75c17b0e00b3a4246e4cd3ec0856bd445efe3e4b50d59db8879", kill_on_drop: false }`
[INFO] [stderr]    Compiling libcnb v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.35s
[INFO] running `Command { std: "docker" "inspect" "80778a17ed23f75c17b0e00b3a4246e4cd3ec0856bd445efe3e4b50d59db8879", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80778a17ed23f75c17b0e00b3a4246e4cd3ec0856bd445efe3e4b50d59db8879", kill_on_drop: false }`
[INFO] [stdout] 80778a17ed23f75c17b0e00b3a4246e4cd3ec0856bd445efe3e4b50d59db8879
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9bed141d65cc94ab0cd76dd1115ac690d5678e80e4d88bbd4f083f237666f71d
[INFO] running `Command { std: "docker" "start" "-a" "9bed141d65cc94ab0cd76dd1115ac690d5678e80e4d88bbd4f083f237666f71d", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/libcnb-c92f7cdd3afb3a12)
[INFO] [stdout] 
[INFO] [stdout] running 25 tests
[INFO] [stdout] test data::buildpack::tests::buildpack_id_does_not_allow_app ... ok
[INFO] [stdout] test data::buildpack::tests::buildpack_id_does_not_allow_config ... ok
[INFO] [stdout] test layer_env::test::test_layer_env_delta_eq ... ok
[INFO] [stdout] test layer_env::test::test_layer_env_insert ... ok
[INFO] [stdout] test layer_env::test::test_layer_env_delta_fs_read_write ... ok
[INFO] [stdout] test data::buildpack::tests::buildpack_id_from_str_major ... ok
[INFO] [stdout] test data::buildpack_plan::tests::it_parses_simple ... ok
[INFO] [stdout] test data::buildpack_plan::tests::it_parses_with_metadata ... ok
[INFO] [stdout] test data::build_plan::tests::it_writes_simple_build_plan ... ok
[INFO] [stdout] test data::layer_content_metadata::tests::metadata_is_optional ... ok
[INFO] [stdout] test data::buildpack::tests::buildpack_id_from_str_major_minor ... ok
[INFO] [stdout] test layer_env::test::test_reference_impl_add_root_dir_should_append_posix_directories ... ok
[INFO] [stdout] test data::buildpack::tests::can_serialize_metabuildpack ... ok
[INFO] [stdout] test layer_env::test::test_read_from_layer_dir_layer_paths_launch ... ok
[INFO] [stdout] test data::buildpack::tests::can_serialize_minimal_metabuildpack ... ok
[INFO] [stdout] test layer_env::test::test_reference_impl_env_files_have_a_suffix_it_performs_the_matching_action ... ok
[INFO] [stdout] test data::buildpack_plan::tests::it_parses_empty ... ok
[INFO] [stdout] test layer_env::test::test_modification_behavior_order ... ok
[INFO] [stdout] test layer_env::test::test_read_from_layer_dir_layer_paths_build ... ok
[INFO] [stdout] test platform::tests::from_path_doesnt_blow_up_if_platform_env_is_missing ... ok
[INFO] [stdout] test platform::tests::from_path_handles_directories_in_env_folder ... ok
[INFO] [stdout] test platform::tests::from_path_handles_directories_via_symlinks ... ok
[INFO] [stdout] test layer_env::test::test_reference_impl_env_files_have_no_suffix_default_action_is_override ... ok
[INFO] [stdout] test data::buildpack::tests::can_serialize_minimal_buildpack ... ok
[INFO] [stderr]    Doc-tests libcnb
[INFO] [stdout] test env::test::test_into_iterator ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 25 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 17 tests
[INFO] [stdout] test src/platform.rs - platform::PlatformEnv::var (line 45) - compile ... ok
[INFO] [stdout] test src/platform.rs - platform::Platform::from_path (line 28) - compile ... ok
[INFO] [stdout] test src/platform.rs - platform::PlatformEnv::from_path (line 63) - compile ... ok
[INFO] [stdout] test src/runtime.rs - runtime::cnb_runtime (line 19) - compile ... ok
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name libcnb --test /opt/rustwide/workdir/src/lib.rs -L dependency=/opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-df981c5871754530.rlib --extern libcnb=/opt/rustwide/target/debug/deps/liblibcnb-73500e02d8f06f1c.rlib --extern regex=/opt/rustwide/target/debug/deps/libregex-27bd9e77ed307a48.rlib --extern semver=/opt/rustwide/target/debug/deps/libsemver-679990da26ad35a0.rlib --extern serde=/opt/rustwide/target/debug/deps/libserde-1ce2c22b35a409bb.rlib --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-c2f0cf885db1e72b.rlib --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-2d096d62f171a78c.rlib --extern toml=/opt/rustwide/target/debug/deps/libtoml-cae5dcc2e8472f38.rlib -C embed-bitcode=no --error-format human` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "9bed141d65cc94ab0cd76dd1115ac690d5678e80e4d88bbd4f083f237666f71d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bed141d65cc94ab0cd76dd1115ac690d5678e80e4d88bbd4f083f237666f71d", kill_on_drop: false }`
[INFO] [stdout] 9bed141d65cc94ab0cd76dd1115ac690d5678e80e4d88bbd4f083f237666f71d