[INFO] fetching crate core_extensions 1.4.2...
[INFO] testing core_extensions-1.4.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate core_extensions 1.4.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate core_extensions 1.4.2 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 core_extensions 1.4.2
[INFO] finished tweaking crates.io crate core_extensions 1.4.2
[INFO] tweaked toml for crates.io crate core_extensions 1.4.2 written to /workspace/builds/worker-4/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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded core_extensions_proc_macros v1.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 97f80339ccb3b8064fa16043b494f657456363bf0f0d5cfbead5cfd355f844f1
[INFO] running `Command { std: "docker" "start" "-a" "97f80339ccb3b8064fa16043b494f657456363bf0f0d5cfbead5cfd355f844f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97f80339ccb3b8064fa16043b494f657456363bf0f0d5cfbead5cfd355f844f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97f80339ccb3b8064fa16043b494f657456363bf0f0d5cfbead5cfd355f844f1", kill_on_drop: false }`
[INFO] [stdout] 97f80339ccb3b8064fa16043b494f657456363bf0f0d5cfbead5cfd355f844f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] af89c010674f239bfea1418e4771c4c855f8dede3d1b3b3c363ef3735e16352d
[INFO] running `Command { std: "docker" "start" "-a" "af89c010674f239bfea1418e4771c4c855f8dede3d1b3b3c363ef3735e16352d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling core_extensions v1.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "af89c010674f239bfea1418e4771c4c855f8dede3d1b3b3c363ef3735e16352d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af89c010674f239bfea1418e4771c4c855f8dede3d1b3b3c363ef3735e16352d", kill_on_drop: false }`
[INFO] [stdout] af89c010674f239bfea1418e4771c4c855f8dede3d1b3b3c363ef3735e16352d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 5f8aa99c275297e8f342488ed1c9cf69557a55997d67b7ec4016d48a3dc3a292
[INFO] running `Command { std: "docker" "start" "-a" "5f8aa99c275297e8f342488ed1c9cf69557a55997d67b7ec4016d48a3dc3a292", kill_on_drop: false }`
[INFO] [stderr]    Compiling core_extensions v1.4.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src_core_extensions/test_utils.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 53 |     pub fn new(max: usize) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `clone_count`
[INFO] [stdout]   --> src_core_extensions/test_utils.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 61 |     pub fn clone_count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `drop_count`
[INFO] [stdout]   --> src_core_extensions/test_utils.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub fn drop_count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "5f8aa99c275297e8f342488ed1c9cf69557a55997d67b7ec4016d48a3dc3a292", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f8aa99c275297e8f342488ed1c9cf69557a55997d67b7ec4016d48a3dc3a292", kill_on_drop: false }`
[INFO] [stdout] 5f8aa99c275297e8f342488ed1c9cf69557a55997d67b7ec4016d48a3dc3a292
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 01b2562bfaace7bba13c5526aa0aecf6f11126a54c4e93e1448eecbde443ff24
[INFO] running `Command { std: "docker" "start" "-a" "01b2562bfaace7bba13c5526aa0aecf6f11126a54c4e93e1448eecbde443ff24", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src_core_extensions/test_utils.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 53 |     pub fn new(max: usize) -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `clone_count`
[INFO] [stderr]   --> src_core_extensions/test_utils.rs:61:12
[INFO] [stderr]    |
[INFO] [stderr] 61 |     pub fn clone_count(&self) -> usize {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `drop_count`
[INFO] [stderr]   --> src_core_extensions/test_utils.rs:65:12
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub fn drop_count(&self) -> usize {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `core_extensions` (lib test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/core_extensions-b92f1bca7c23e3b5)
[INFO] [stdout] running 1 test
[INFO] [stdout] test utils::tests::take_manuallydrop_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests core_extensions
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src_core_extensions/lib.rs - (line 34) ... ignored
[INFO] [stdout] test src_core_extensions/utils.rs - utils::impossible (line 116) ... ignored
[INFO] [stdout] test src_core_extensions/macros/matches_macro.rs - matches (line 9) ... ok
[INFO] [stdout] test src_core_extensions/utils.rs - utils::transmute_ignore_size (line 19) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 2 ignored; 0 measured; 0 filtered out; finished in 0.26s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "01b2562bfaace7bba13c5526aa0aecf6f11126a54c4e93e1448eecbde443ff24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01b2562bfaace7bba13c5526aa0aecf6f11126a54c4e93e1448eecbde443ff24", kill_on_drop: false }`
[INFO] [stdout] 01b2562bfaace7bba13c5526aa0aecf6f11126a54c4e93e1448eecbde443ff24