[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] checking michael-groble/zset against try#0bdee9e879c87b7211d316e9152109cfd46c576b for pr-150097
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichael-groble%2Fzset" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[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-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/michael-groble/zset on toolchain 0bdee9e879c87b7211d316e9152109cfd46c576b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5cd811f6356cbdcc4ec508fdbebcb889346497e68826c655e9da57ef4028969d
[INFO] running `Command { std: "docker" "start" "-a" "5cd811f6356cbdcc4ec508fdbebcb889346497e68826c655e9da57ef4028969d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5cd811f6356cbdcc4ec508fdbebcb889346497e68826c655e9da57ef4028969d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cd811f6356cbdcc4ec508fdbebcb889346497e68826c655e9da57ef4028969d", kill_on_drop: false }`
[INFO] [stdout] 5cd811f6356cbdcc4ec508fdbebcb889346497e68826c655e9da57ef4028969d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fb7d75ce444908e6c9f36afc262ff44b4881a54a5b712d69b8f4190c7d945ed
[INFO] running `Command { std: "docker" "start" "-a" "8fb7d75ce444908e6c9f36afc262ff44b4881a54a5b712d69b8f4190c7d945ed", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking zset v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: 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]     |                       this raw pointer has type `*mut Node<T, S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements
[INFO] [stdout] note: autoref is being applied to this expression, resulting in: `&[Level<T, S>]`
[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] note: method calls to `len` require a reference
[INFO] [stdout]    --> library/core/src/slice/mod.rs:115:4
[INFO] [stdout]     = note: `#[deny(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)]` (part of `#[warn(unused)]`) 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] error: could not compile `zset` (lib) due to 1 previous error; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: 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]     |                       this raw pointer has type `*mut Node<T, S>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: creating a reference requires the pointer target to be valid and imposes aliasing requirements
[INFO] [stdout] note: autoref is being applied to this expression, resulting in: `&[Level<T, S>]`
[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] note: method calls to `len` require a reference
[INFO] [stdout]    --> library/core/src/slice/mod.rs:115:4
[INFO] [stdout]     = note: `#[deny(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)]` (part of `#[warn(unused)]`) 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] error: could not compile `zset` (lib test) due to 1 previous error; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "8fb7d75ce444908e6c9f36afc262ff44b4881a54a5b712d69b8f4190c7d945ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fb7d75ce444908e6c9f36afc262ff44b4881a54a5b712d69b8f4190c7d945ed", kill_on_drop: false }`
[INFO] [stdout] 8fb7d75ce444908e6c9f36afc262ff44b4881a54a5b712d69b8f4190c7d945ed
