[INFO] fetching crate rax 0.1.5...
[INFO] checking rax-0.1.5 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate rax 0.1.5 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate rax 0.1.5 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rax 0.1.5
[INFO] finished tweaking crates.io crate rax 0.1.5
[INFO] tweaked toml for crates.io crate rax 0.1.5 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0d82bb16728b7cb42b752b1445ff99841198a8720fb1e2e2c4d3bd9d16cf4c72
[INFO] running `"docker" "start" "-a" "0d82bb16728b7cb42b752b1445ff99841198a8720fb1e2e2c4d3bd9d16cf4c72"`
[INFO] [stderr]    Compiling rax v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'gcc::Build': crate has been renamed to `cc`, the `gcc` name is not maintained
[INFO] [stderr]  --> build.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     gcc::Build::new()
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'gcc::Build::new': crate has been renamed to `cc`, the `gcc` name is not maintained
[INFO] [stderr]  --> build.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     gcc::Build::new()
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/lib.rs:1771:32
[INFO] [stderr]      |
[INFO] [stderr] 1771 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]      |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/lib.rs:1807:32
[INFO] [stderr]      |
[INFO] [stderr] 1807 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]      |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Bencher`
[INFO] [stderr]     --> src/lib.rs:1969:16
[INFO] [stderr]      |
[INFO] [stderr] 1969 |     use test::{Bencher};
[INFO] [stderr]      |                ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/lib.rs:1771:32
[INFO] [stderr]      |
[INFO] [stderr] 1771 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]      |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/lib.rs:1807:32
[INFO] [stderr]      |
[INFO] [stderr] 1807 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stderr]      |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'libc::uint64_t': Use u64 instead.
[INFO] [stderr]     --> src/lib.rs:1957:10
[INFO] [stderr]      |
[INFO] [stderr] 1957 |     ) -> libc::uint64_t;
[INFO] [stderr]      |          ^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:568:47
[INFO] [stderr]     |
[INFO] [stderr] 568 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:592:47
[INFO] [stderr]     |
[INFO] [stderr] 592 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:615:47
[INFO] [stderr]     |
[INFO] [stderr] 615 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:639:47
[INFO] [stderr]     |
[INFO] [stderr] 639 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:664:47
[INFO] [stderr]     |
[INFO] [stderr] 664 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:690:47
[INFO] [stderr]     |
[INFO] [stderr] 690 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:706:47
[INFO] [stderr]     |
[INFO] [stderr] 706 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:725:47
[INFO] [stderr]     |
[INFO] [stderr] 725 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:901:51
[INFO] [stderr]     |
[INFO] [stderr] 901 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:925:51
[INFO] [stderr]     |
[INFO] [stderr] 925 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:948:51
[INFO] [stderr]     |
[INFO] [stderr] 948 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:972:51
[INFO] [stderr]     |
[INFO] [stderr] 972 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:997:51
[INFO] [stderr]     |
[INFO] [stderr] 997 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/lib.rs:1023:51
[INFO] [stderr]      |
[INFO] [stderr] 1023 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/lib.rs:1039:51
[INFO] [stderr]      |
[INFO] [stderr] 1039 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/lib.rs:1058:51
[INFO] [stderr]      |
[INFO] [stderr] 1058 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/lib.rs:1613:47
[INFO] [stderr]      |
[INFO] [stderr] 1613 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]      |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'libc::uint64_t': Use u64 instead.
[INFO] [stderr]     --> src/lib.rs:1957:10
[INFO] [stderr]      |
[INFO] [stderr] 1957 |     ) -> libc::uint64_t;
[INFO] [stderr]      |          ^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:568:47
[INFO] [stderr]     |
[INFO] [stderr] 568 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:592:47
[INFO] [stderr]     |
[INFO] [stderr] 592 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:615:47
[INFO] [stderr]     |
[INFO] [stderr] 615 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:639:47
[INFO] [stderr]     |
[INFO] [stderr] 639 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:664:47
[INFO] [stderr]     |
[INFO] [stderr] 664 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:690:47
[INFO] [stderr]     |
[INFO] [stderr] 690 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:706:47
[INFO] [stderr]     |
[INFO] [stderr] 706 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:725:47
[INFO] [stderr]     |
[INFO] [stderr] 725 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]     |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:901:51
[INFO] [stderr]     |
[INFO] [stderr] 901 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:925:51
[INFO] [stderr]     |
[INFO] [stderr] 925 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:948:51
[INFO] [stderr]     |
[INFO] [stderr] 948 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:972:51
[INFO] [stderr]     |
[INFO] [stderr] 972 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/lib.rs:997:51
[INFO] [stderr]     |
[INFO] [stderr] 997 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]     |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/lib.rs:1023:51
[INFO] [stderr]      |
[INFO] [stderr] 1023 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/lib.rs:1039:51
[INFO] [stderr]      |
[INFO] [stderr] 1039 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/lib.rs:1058:51
[INFO] [stderr]      |
[INFO] [stderr] 1058 |             let mut iter: RaxIterator<K, usize> = std::mem::uninitialized();
[INFO] [stderr]      |                                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/lib.rs:1613:47
[INFO] [stderr]      |
[INFO] [stderr] 1613 |             let mut iter: RaxIterator<K, V> = std::mem::uninitialized();
[INFO] [stderr]      |                                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:2190:21
[INFO] [stderr]      |
[INFO] [stderr] 2190 |                 let mut r = &mut RaxMap::<u64, &str>::new();
[INFO] [stderr]      |                     ----^
[INFO] [stderr]      |                     |
[INFO] [stderr]      |                     help: remove this `mut`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:2201:21
[INFO] [stderr]      |
[INFO] [stderr] 2201 |                 let mut r = &mut RaxSet::<u64>::new();
[INFO] [stderr]      |                     ----^
[INFO] [stderr]      |                     |
[INFO] [stderr]      |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:2212:21
[INFO] [stderr]      |
[INFO] [stderr] 2212 |                 let mut r = &mut std::collections::BTreeSet::<u64>::new();
[INFO] [stderr]      |                     ----^
[INFO] [stderr]      |                     |
[INFO] [stderr]      |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:2222:21
[INFO] [stderr]      |
[INFO] [stderr] 2222 |                 let mut r = &mut std::collections::BTreeMap::<u64, &str>::new();
[INFO] [stderr]      |                     ----^
[INFO] [stderr]      |                     |
[INFO] [stderr]      |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:2233:21
[INFO] [stderr]      |
[INFO] [stderr] 2233 |                 let mut r = &mut std::collections::HashMap::<u64, &str>::new();
[INFO] [stderr]      |                     ----^
[INFO] [stderr]      |                     |
[INFO] [stderr]      |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:2296:17
[INFO] [stderr]      |
[INFO] [stderr] 2296 |             let mut r = &mut RaxMap::<u64, &str>::new();
[INFO] [stderr]      |                 ----^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:2328:17
[INFO] [stderr]      |
[INFO] [stderr] 2328 |             let mut r = &mut RaxMap::<u64, &str>::new();
[INFO] [stderr]      |                 ----^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> benches/bench.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |         r.insert_null(3);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.53s
[INFO] running `"docker" "inspect" "0d82bb16728b7cb42b752b1445ff99841198a8720fb1e2e2c4d3bd9d16cf4c72"`
[INFO] running `"docker" "rm" "-f" "0d82bb16728b7cb42b752b1445ff99841198a8720fb1e2e2c4d3bd9d16cf4c72"`
[INFO] [stdout] 0d82bb16728b7cb42b752b1445ff99841198a8720fb1e2e2c4d3bd9d16cf4c72