[INFO] fetching crate skew-heap 0.2.0...
[INFO] testing skew-heap-0.2.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate skew-heap 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate skew-heap 0.2.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate skew-heap 0.2.0
[INFO] finished tweaking crates.io crate skew-heap 0.2.0
[INFO] tweaked toml for crates.io crate skew-heap 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 24c6c598f6c16ff780d88325c73254827718cd35ad9bca69b087d9baf92b6f5d
[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" "24c6c598f6c16ff780d88325c73254827718cd35ad9bca69b087d9baf92b6f5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "24c6c598f6c16ff780d88325c73254827718cd35ad9bca69b087d9baf92b6f5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24c6c598f6c16ff780d88325c73254827718cd35ad9bca69b087d9baf92b6f5d", kill_on_drop: false }`
[INFO] [stdout] 24c6c598f6c16ff780d88325c73254827718cd35ad9bca69b087d9baf92b6f5d
[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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "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] db705958360ae5846a22f392a75d1f74ec3559f57f0368be439ff0352802d10a
[INFO] running `Command { std: "docker" "start" "-a" "db705958360ae5846a22f392a75d1f74ec3559f57f0368be439ff0352802d10a", kill_on_drop: false }`
[INFO] [stderr]    Compiling skew-heap v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `Command { std: "docker" "inspect" "db705958360ae5846a22f392a75d1f74ec3559f57f0368be439ff0352802d10a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db705958360ae5846a22f392a75d1f74ec3559f57f0368be439ff0352802d10a", kill_on_drop: false }`
[INFO] [stdout] db705958360ae5846a22f392a75d1f74ec3559f57f0368be439ff0352802d10a
[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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--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] d5730aec1e295f3c449ffa9778bf105f88abe8feedcde049bc353ef60312fc31
[INFO] running `Command { std: "docker" "start" "-a" "d5730aec1e295f3c449ffa9778bf105f88abe8feedcde049bc353ef60312fc31", kill_on_drop: false }`
[INFO] [stderr]    Compiling quickcheck v0.2.27
[INFO] [stderr]    Compiling skew-heap v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> tests/quickcheck.rs:28:29
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn shrink(&self) -> Box<Iterator<Item = Self>> {
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 28 -     fn shrink(&self) -> Box<Iterator<Item = Self>> {
[INFO] [stdout] 28 +     fn shrink(&self) -> Box<dyn Iterator<Item = Self>> {
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.03s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]   Executable tests/quickcheck.rs (/opt/rustwide/target/debug/deps/quickcheck-9ec64a44a251a7f7)
[INFO] running `Command { std: "docker" "inspect" "d5730aec1e295f3c449ffa9778bf105f88abe8feedcde049bc353ef60312fc31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5730aec1e295f3c449ffa9778bf105f88abe8feedcde049bc353ef60312fc31", kill_on_drop: false }`
[INFO] [stdout] d5730aec1e295f3c449ffa9778bf105f88abe8feedcde049bc353ef60312fc31
[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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e4b9750fb49a5fa3ed8cb5ba725fb9b0dd5629df45cb15388a565b128e634a24
[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" "e4b9750fb49a5fa3ed8cb5ba725fb9b0dd5629df45cb15388a565b128e634a24", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> tests/quickcheck.rs:28:29
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn shrink(&self) -> Box<Iterator<Item = Self>> {
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 28 -     fn shrink(&self) -> Box<Iterator<Item = Self>> {
[INFO] [stderr] 28 +     fn shrink(&self) -> Box<dyn Iterator<Item = Self>> {
[INFO] [stderr]    | 
[INFO] [stderr] 
[INFO] [stderr] warning: `skew-heap` (test "quickcheck") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running tests/quickcheck.rs (/opt/rustwide/target/debug/deps/quickcheck-9ec64a44a251a7f7)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test agrees_with_binary_heap ... ok
[INFO] [stdout] test iter_agrees_with_binary_heap_iter ... ok
[INFO] [stdout] test into_iter_agrees_with_binary_heap_iter ... ok
[INFO] [stdout] test clone_from ... ok
[INFO] [stdout] test append ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests skew-heap
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - SkewHeap<T>::replace (line 175) ... ok
[INFO] [stdout] test src/lib.rs - SkewHeap<T>::push_pop (line 132) ... ok
[INFO] [stdout] test src/lib.rs - SkewHeap<T>::append (line 90) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.54s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e4b9750fb49a5fa3ed8cb5ba725fb9b0dd5629df45cb15388a565b128e634a24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4b9750fb49a5fa3ed8cb5ba725fb9b0dd5629df45cb15388a565b128e634a24", kill_on_drop: false }`
[INFO] [stdout] e4b9750fb49a5fa3ed8cb5ba725fb9b0dd5629df45cb15388a565b128e634a24