[INFO] cloning repository https://github.com/rklaehn/rust-nursery
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rklaehn/rust-nursery" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frklaehn%2Frust-nursery", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frklaehn%2Frust-nursery'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d9cabeafe1b0bb90ccbf54d168bc0376e23c658
[INFO] checking rklaehn/rust-nursery against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frklaehn%2Frust-nursery" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rklaehn/rust-nursery on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rklaehn/rust-nursery
[INFO] finished tweaking git repo https://github.com/rklaehn/rust-nursery
[INFO] tweaked toml for git repo https://github.com/rklaehn/rust-nursery written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rklaehn/rust-nursery 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_json v1.0.41
[INFO] [stderr]   Downloaded proc-macro2 v1.0.6
[INFO] [stderr]   Downloaded getrandom v0.1.13
[INFO] [stderr]   Downloaded serde_derive v1.0.102
[INFO] [stderr]   Downloaded serde v1.0.102
[INFO] [stderr]   Downloaded syn v1.0.8
[INFO] [stderr]   Downloaded sorted-iter v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 75cb5f03e3222cc6f91eb043a59d74ed1ea4dc5d655064f8379bbf8c67d3771e
[INFO] running `Command { std: "docker" "start" "-a" "75cb5f03e3222cc6f91eb043a59d74ed1ea4dc5d655064f8379bbf8c67d3771e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "75cb5f03e3222cc6f91eb043a59d74ed1ea4dc5d655064f8379bbf8c67d3771e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75cb5f03e3222cc6f91eb043a59d74ed1ea4dc5d655064f8379bbf8c67d3771e", kill_on_drop: false }`
[INFO] [stdout] 75cb5f03e3222cc6f91eb043a59d74ed1ea4dc5d655064f8379bbf8c67d3771e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5dbeb2bceebd4e6b43a6e6c9ec538599405b0150b91ad3b82b445003bad00c2
[INFO] running `Command { std: "docker" "start" "-a" "f5dbeb2bceebd4e6b43a6e6c9ec538599405b0150b91ad3b82b445003bad00c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling syn v1.0.8
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking smallvec v1.0.0
[INFO] [stderr]     Checking sorted-iter v0.1.5
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking num-complex v0.2.3
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking alga v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking vec-collections v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `VecSet`
[INFO] [stdout]  --> src/total_vec_set.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{VecSet, VecSet2};
[INFO] [stdout]   |             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `UnsafeSliceMergeState`
[INFO] [stdout]  --> src/vec_set.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 |     UnsafeInPlaceMergeState, UnsafeSliceMergeState, VecMergeState, SmallVecInPlaceMergeState,
[INFO] [stdout]   |                              ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/flip_buffer/small_vec_builder.rs:177:67
[INFO] [stdout]     |
[INFO] [stdout] 177 |         let v = std::mem::replace(&mut self.v, unsafe { std::mem::uninitialized() });
[INFO] [stdout]     |                                                                   ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `merge` is never used
[INFO] [stdout]   --> src/merge_state.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<'a, A: Array, B: Array> SmallVecInPlaceMergeState<A, B> {
[INFO] [stdout]    | ------------------------------------------------------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 70 |     pub fn merge<O: MergeOperation<A::Item, B::Item, Self>>(a: &mut SmallVec<A>, b: SmallVec<B>, o: O) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `merge` is never used
[INFO] [stdout]    --> src/merge_state.rs:344:12
[INFO] [stdout]     |
[INFO] [stdout] 320 | impl<'a, A, B, Arr: Array> SmallVecMergeState<'a, A, B, Arr> {
[INFO] [stdout]     | ------------------------------------------------------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 344 |     pub fn merge<O: MergeOperation<A, B, Self>>(a: &'a [A], b: &'a [B], o: O) -> SmallVec<Arr> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnsafeSliceMergeState` is never constructed
[INFO] [stdout]    --> src/merge_state.rs:466:19
[INFO] [stdout]     |
[INFO] [stdout] 466 | pub(crate) struct UnsafeSliceMergeState<T> {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `merge` is never used
[INFO] [stdout]    --> src/merge_state.rs:476:12
[INFO] [stdout]     |
[INFO] [stdout] 475 | impl<T> UnsafeSliceMergeState<T> {
[INFO] [stdout]     | -------------------------------- associated function in this implementation
[INFO] [stdout] 476 |     pub fn merge<O: ShortcutMergeOperation<T, T, Self>>(
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dedup` is never used
[INFO] [stdout]   --> src/dedup.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn dedup<T: Eq>(d: &mut [T], keep: Keep) -> usize {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `single` and `filter_map_values` are never used
[INFO] [stdout]   --> src/radix_tree.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl<K: Ord, V> TagTree<K, V> {
[INFO] [stdout]    | ----------------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 87 |     fn single(key: Vec<K>, value: V) -> Self {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 96 |     fn filter_map_values<W>(self, f: &impl Fn(V) -> Option<W>) -> Option<TagTree<K, W>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `inner_join_with` is never used
[INFO] [stdout]    --> src/radix_tree.rs:142:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | impl<K: Ord + Clone, V: Clone> TagTree<K, V> {
[INFO] [stdout]     | -------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 142 |     fn inner_join_with(&self, that: &Self, f: &impl Fn(&V, &V) -> Option<V>) -> Option<Self> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `min` and `max` are never used
[INFO] [stdout]    --> src/radix_tree.rs:164:8
[INFO] [stdout]     |
[INFO] [stdout] 163 | impl<K: Ord + Clone, V: Ord + Clone + Zero> TagTree<K, V> {
[INFO] [stdout]     | --------------------------------------------------------- methods in this implementation
[INFO] [stdout] 164 |     fn min(&self, that: &Self) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 169 |     fn max(&self, that: &Self) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_range_bounds` is never used
[INFO] [stdout]    --> src/range_set.rs:175:8
[INFO] [stdout]     |
[INFO] [stdout] 174 | impl<T: Ord + Clone> RangeSet<T> {
[INFO] [stdout]     | -------------------------------- associated function in this implementation
[INFO] [stdout] 175 |     fn from_range_bounds<R: RangeBounds<T>>(r: R) -> std::result::Result<Self, ()> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `SmallVec<A>` does not permit being left uninitialized
[INFO] [stdout]    --> src/flip_buffer/small_vec_builder.rs:177:57
[INFO] [stdout]     |
[INFO] [stdout] 177 |         let v = std::mem::replace(&mut self.v, unsafe { std::mem::uninitialized() });
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                         |
[INFO] [stdout]     |                                                         this code causes undefined behavior when executed
[INFO] [stdout]     |                                                         help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: integers must be initialized
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `VecSet`
[INFO] [stdout]  --> src/total_vec_set.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{VecSet, VecSet2};
[INFO] [stdout]   |             ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/flip_buffer/small_vec_builder.rs:177:67
[INFO] [stdout]     |
[INFO] [stdout] 177 |         let v = std::mem::replace(&mut self.v, unsafe { std::mem::uninitialized() });
[INFO] [stdout]     |                                                                   ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `merge` is never used
[INFO] [stdout]   --> src/merge_state.rs:70:12
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<'a, A: Array, B: Array> SmallVecInPlaceMergeState<A, B> {
[INFO] [stdout]    | ------------------------------------------------------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 70 |     pub fn merge<O: MergeOperation<A::Item, B::Item, Self>>(a: &mut SmallVec<A>, b: SmallVec<B>, o: O) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `merge` is never used
[INFO] [stdout]    --> src/merge_state.rs:344:12
[INFO] [stdout]     |
[INFO] [stdout] 320 | impl<'a, A, B, Arr: Array> SmallVecMergeState<'a, A, B, Arr> {
[INFO] [stdout]     | ------------------------------------------------------------ associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 344 |     pub fn merge<O: MergeOperation<A, B, Self>>(a: &'a [A], b: &'a [B], o: O) -> SmallVec<Arr> {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_on_failure_unary` is never used
[INFO] [stdout]    --> src/total_vec_set.rs:285:8
[INFO] [stdout]     |
[INFO] [stdout] 285 |     fn print_on_failure_unary<E: Debug, R: Eq + Debug>(x: E, expected: R, actual: R) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dedup` is never used
[INFO] [stdout]   --> src/dedup.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn dedup<T: Eq>(d: &mut [T], keep: Keep) -> usize {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `filter_map_values` is never used
[INFO] [stdout]   --> src/radix_tree.rs:96:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl<K: Ord, V> TagTree<K, V> {
[INFO] [stdout]    | ----------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 96 |     fn filter_map_values<W>(self, f: &impl Fn(V) -> Option<W>) -> Option<TagTree<K, W>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `max` is never used
[INFO] [stdout]    --> src/radix_tree.rs:169:8
[INFO] [stdout]     |
[INFO] [stdout] 163 | impl<K: Ord + Clone, V: Ord + Clone + Zero> TagTree<K, V> {
[INFO] [stdout]     | --------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 169 |     fn max(&self, that: &Self) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `smallvec::SmallVec<A>` does not permit being left uninitialized
[INFO] [stdout]    --> src/flip_buffer/small_vec_builder.rs:177:57
[INFO] [stdout]     |
[INFO] [stdout] 177 |         let v = std::mem::replace(&mut self.v, unsafe { std::mem::uninitialized() });
[INFO] [stdout]     |                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                         |
[INFO] [stdout]     |                                                         this code causes undefined behavior when executed
[INFO] [stdout]     |                                                         help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout]     = note: integers must be initialized
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.83s
[INFO] running `Command { std: "docker" "inspect" "f5dbeb2bceebd4e6b43a6e6c9ec538599405b0150b91ad3b82b445003bad00c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5dbeb2bceebd4e6b43a6e6c9ec538599405b0150b91ad3b82b445003bad00c2", kill_on_drop: false }`
[INFO] [stdout] f5dbeb2bceebd4e6b43a6e6c9ec538599405b0150b91ad3b82b445003bad00c2