[INFO] cloning repository https://github.com/michael-groble/zset
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michael-groble/zset" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichael-groble%2Fzset", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichael-groble%2Fzset'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8fcecd83bcfec5a88e21ab19fe793a30e25e1035
[INFO] testing michael-groble/zset against try#17092ad00ed8fe1e7f81a7e38238ff70779034b1 for pr-140985
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichael-groble%2Fzset" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/michael-groble/zset on toolchain 17092ad00ed8fe1e7f81a7e38238ff70779034b1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/michael-groble/zset
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/michael-groble/zset
[INFO] tweaked toml for git repo https://github.com/michael-groble/zset written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/michael-groble/zset already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "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
[ERROR] error running command: no output for 300 seconds
[INFO] testing michael-groble/zset against try#17092ad00ed8fe1e7f81a7e38238ff70779034b1 for pr-140985
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichael-groble%2Fzset" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/michael-groble/zset on toolchain 17092ad00ed8fe1e7f81a7e38238ff70779034b1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/michael-groble/zset
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/michael-groble/zset
[INFO] tweaked toml for git repo https://github.com/michael-groble/zset written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/michael-groble/zset already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7c263ddd288ed74826a00697038ed3ab8d5a3f78c6adb0755c9ef501cb2201f
[INFO] running `Command { std: "docker" "start" "-a" "d7c263ddd288ed74826a00697038ed3ab8d5a3f78c6adb0755c9ef501cb2201f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7c263ddd288ed74826a00697038ed3ab8d5a3f78c6adb0755c9ef501cb2201f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7c263ddd288ed74826a00697038ed3ab8d5a3f78c6adb0755c9ef501cb2201f", kill_on_drop: false }`
[INFO] [stdout] d7c263ddd288ed74826a00697038ed3ab8d5a3f78c6adb0755c9ef501cb2201f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34ed4f67facbc46197a0e2af2ff4e9695e6079f3f64c8c47bdfb3f6c10b7cb08
[INFO] running `Command { std: "docker" "start" "-a" "34ed4f67facbc46197a0e2af2ff4e9695e6079f3f64c8c47bdfb3f6c10b7cb08", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.9
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling zset v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: implicit autoref creates a reference to the dereference of a raw pointer
[INFO] [stdout]    --> src/skip_list.rs:642:21
[INFO] [stdout]     |
[INFO] [stdout] 642 |         let level = (*node.as_ptr()).levels.len() - 1; // see [Node::new]
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements
[INFO] [stdout]     = note: `#[warn(dangerous_implicit_autorefs)]` on by default
[INFO] [stdout] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit
[INFO] [stdout]     |
[INFO] [stdout] 642 |         let level = (&(*node.as_ptr()).levels).len() - 1; // see [Node::new]
[INFO] [stdout]     |                     ++                       +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:179:22
[INFO] [stdout]     |
[INFO] [stdout] 179 |             unsafe { Box::from_raw(elt.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 179 |             unsafe { let _ = Box::from_raw(elt.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:237:22
[INFO] [stdout]     |
[INFO] [stdout] 237 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 237 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:248:22
[INFO] [stdout]     |
[INFO] [stdout] 248 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 248 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:260:22
[INFO] [stdout]     |
[INFO] [stdout] 260 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 260 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.91s
[INFO] running `Command { std: "docker" "inspect" "34ed4f67facbc46197a0e2af2ff4e9695e6079f3f64c8c47bdfb3f6c10b7cb08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34ed4f67facbc46197a0e2af2ff4e9695e6079f3f64c8c47bdfb3f6c10b7cb08", kill_on_drop: false }`
[INFO] [stdout] 34ed4f67facbc46197a0e2af2ff4e9695e6079f3f64c8c47bdfb3f6c10b7cb08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac26100a4d4e676ffd8f1282a67b24b52db7d4f6207d00f212ea62d473ae9433
[INFO] running `Command { std: "docker" "start" "-a" "ac26100a4d4e676ffd8f1282a67b24b52db7d4f6207d00f212ea62d473ae9433", kill_on_drop: false }`
[INFO] [stdout] warning: implicit autoref creates a reference to the dereference of a raw pointer
[INFO] [stdout]    --> src/skip_list.rs:642:21
[INFO] [stdout]     |
[INFO] [stdout] 642 |         let level = (*node.as_ptr()).levels.len() - 1; // see [Node::new]
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements
[INFO] [stdout]     = note: `#[warn(dangerous_implicit_autorefs)]` on by default
[INFO] [stdout] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit
[INFO] [stdout]     |
[INFO] [stdout] 642 |         let level = (&(*node.as_ptr()).levels).len() - 1; // see [Node::new]
[INFO] [stdout]     |                     ++                       +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:179:22
[INFO] [stdout]     |
[INFO] [stdout] 179 |             unsafe { Box::from_raw(elt.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 179 |             unsafe { let _ = Box::from_raw(elt.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling zset v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:237:22
[INFO] [stdout]     |
[INFO] [stdout] 237 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 237 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:248:22
[INFO] [stdout]     |
[INFO] [stdout] 248 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 248 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:260:22
[INFO] [stdout]     |
[INFO] [stdout] 260 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 260 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: implicit autoref creates a reference to the dereference of a raw pointer
[INFO] [stdout]    --> src/skip_list.rs:642:21
[INFO] [stdout]     |
[INFO] [stdout] 642 |         let level = (*node.as_ptr()).levels.len() - 1; // see [Node::new]
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements
[INFO] [stdout]     = note: `#[warn(dangerous_implicit_autorefs)]` on by default
[INFO] [stdout] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit
[INFO] [stdout]     |
[INFO] [stdout] 642 |         let level = (&(*node.as_ptr()).levels).len() - 1; // see [Node::new]
[INFO] [stdout]     |                     ++                       +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:179:22
[INFO] [stdout]     |
[INFO] [stdout] 179 |             unsafe { Box::from_raw(elt.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 179 |             unsafe { let _ = Box::from_raw(elt.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:237:22
[INFO] [stdout]     |
[INFO] [stdout] 237 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 237 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:248:22
[INFO] [stdout]     |
[INFO] [stdout] 248 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 248 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stdout]    --> src/skip_list_set.rs:260:22
[INFO] [stdout]     |
[INFO] [stdout] 260 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 260 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stdout]     |                      +++++++                                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "ac26100a4d4e676ffd8f1282a67b24b52db7d4f6207d00f212ea62d473ae9433", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac26100a4d4e676ffd8f1282a67b24b52db7d4f6207d00f212ea62d473ae9433", kill_on_drop: false }`
[INFO] [stdout] ac26100a4d4e676ffd8f1282a67b24b52db7d4f6207d00f212ea62d473ae9433
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+17092ad00ed8fe1e7f81a7e38238ff70779034b1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 142f03dcd52cd446c21949a7091e6dc29ff302fa009b0cf7110d497993bc9fb0
[INFO] running `Command { std: "docker" "start" "-a" "142f03dcd52cd446c21949a7091e6dc29ff302fa009b0cf7110d497993bc9fb0", kill_on_drop: false }`
[INFO] [stderr] warning: implicit autoref creates a reference to the dereference of a raw pointer
[INFO] [stderr]    --> src/skip_list.rs:642:21
[INFO] [stderr]     |
[INFO] [stderr] 642 |         let level = (*node.as_ptr()).levels.len() - 1; // see [Node::new]
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements
[INFO] [stderr]     = note: `#[warn(dangerous_implicit_autorefs)]` on by default
[INFO] [stderr] help: try using a raw pointer method instead; or if this reference is intentional, make it explicit
[INFO] [stderr]     |
[INFO] [stderr] 642 |         let level = (&(*node.as_ptr()).levels).len() - 1; // see [Node::new]
[INFO] [stderr]     |                     ++                       +
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stderr]    --> src/skip_list_set.rs:179:22
[INFO] [stderr]     |
[INFO] [stderr] 179 |             unsafe { Box::from_raw(elt.value.as_ptr()) };
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 179 |             unsafe { let _ = Box::from_raw(elt.value.as_ptr()); };
[INFO] [stderr]     |                      +++++++                                  +
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stderr]    --> src/skip_list_set.rs:237:22
[INFO] [stderr]     |
[INFO] [stderr] 237 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 237 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stderr]     |                      +++++++                                  +
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stderr]    --> src/skip_list_set.rs:248:22
[INFO] [stderr]     |
[INFO] [stderr] 248 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 248 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stderr]     |                      +++++++                                  +
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `Box::<T>::from_raw` that must be used
[INFO] [stderr]    --> src/skip_list_set.rs:260:22
[INFO] [stderr]     |
[INFO] [stderr] 260 |             unsafe { Box::from_raw(key.value.as_ptr()) };
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: call `drop(Box::from_raw(ptr))` if you intend to drop the `Box`
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 260 |             unsafe { let _ = Box::from_raw(key.value.as_ptr()); };
[INFO] [stderr]     |                      +++++++                                  +
[INFO] [stderr] 
[INFO] [stderr] warning: `zset` (lib) generated 5 warnings
[INFO] [stderr] warning: `zset` (lib test) generated 5 warnings (5 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/zset-3845fc0e59c33715)
[INFO] [stdout] 
[INFO] [stdout] running 43 tests
[INFO] [stdout] test skip_list::tests::test_backward ... ok
[INFO] [stdout] test skip_list::tests::test_basic ... ok
[INFO] [stdout] test skip_list::tests::test_delete_range_by_rank ... ok
[INFO] [stdout] test skip_list::tests::test_delete_range_by_score ... ok
[INFO] [stdout] test skip_list::tests::test_delete_range_by_lex ... ok
[INFO] [stdout] test skip_list::tests::test_drop ... ok
[INFO] [stdout] test skip_list::tests::test_drop_with_pop ... ok
[INFO] [stdout] test skip_list::tests::test_drop_with_range ... ok
[INFO] [stdout] test skip_list::tests::test_first_in_lexrange ... ok
[INFO] [stdout] test skip_list::tests::test_first_in_range ... ok
[INFO] [stdout] test skip_list::tests::test_in_lexrange ... ok
[INFO] [stdout] test skip_list::tests::test_in_range ... ok
[INFO] [stdout] test skip_list::tests::test_last_in_lexrange ... ok
[INFO] [stdout] test skip_list::tests::test_last_in_range ... ok
[INFO] [stdout] test skip_list::tests::test_lexrange_iter ... ok
[INFO] [stdout] test skip_list::tests::test_range_iter ... ok
[INFO] [stdout] test skip_list::tests::test_rank ... ok
[INFO] [stdout] test skip_list::tests::test_rank_iter ... ok
[INFO] [stdout] test skip_list::tests::test_update_score ... ok
[INFO] [stdout] test skip_list::tests::test_remove ... ok
[INFO] [stdout] test skip_list_set::tests::test_delete_range_by_lex ... ok
[INFO] [stdout] test skip_list_set::tests::test_delete_range_by_rank ... ok
[INFO] [stdout] test skip_list_set::tests::test_drop ... ok
[INFO] [stdout] test skip_list::tests::test_same_score_ordering ... ok
[INFO] [stdout] test skip_list_set::tests::test_drop_delete_in_range ... ok
[INFO] [stdout] test skip_list_set::tests::test_get ... ok
[INFO] [stdout] test skip_list_set::tests::test_drop_in_pop ... ok
[INFO] [stdout] test skip_list_set::tests::test_count_in_lexrange ... ok
[INFO] [stdout] test skip_list_set::tests::test_lexrange_iter ... ok
[INFO] [stdout] test skip_list_set::tests::test_range_iter ... ok
[INFO] [stdout] test skip_list_set::tests::test_rank ... ok
[INFO] [stdout] test skip_list_set::tests::test_pop_min ... ok
[INFO] [stdout] test skip_list_set::tests::test_rank_iter ... ok
[INFO] [stdout] test skip_list::tests::test_update_score_boxed ... ok
[INFO] [stdout] test skip_list_set::tests::test_delete_range_by_score ... ok
[INFO] [stdout] test skip_list_set::tests::test_reverse_rank ... ok
[INFO] [stdout] test skip_list_set::tests::test_count_in_range ... ok
[INFO] [stdout] test skip_list_set::tests::test_pop_max ... ok
[INFO] [stdout] test skip_list_set::tests::test_basic ... ok
[INFO] [stdout] test skip_list_set::tests::test_reinsert_updates_score ... ok
[INFO] [stdout] test skip_list::tests::test_drop_panic ... ok
[INFO] [stdout] test skip_list::tests::test_update_with_wrong_score - should panic ... ok
[INFO] [stdout] test skip_list::tests::test_update_with_wrong_element - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 43 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests zset
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "142f03dcd52cd446c21949a7091e6dc29ff302fa009b0cf7110d497993bc9fb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "142f03dcd52cd446c21949a7091e6dc29ff302fa009b0cf7110d497993bc9fb0", kill_on_drop: false }`
[INFO] [stdout] 142f03dcd52cd446c21949a7091e6dc29ff302fa009b0cf7110d497993bc9fb0