[INFO] fetching crate sequencetree 0.1.4...
[INFO] testing sequencetree-0.1.4 against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] extracting crate sequencetree 0.1.4 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate sequencetree 0.1.4
[INFO] finished tweaking crates.io crate sequencetree 0.1.4
[INFO] tweaked toml for crates.io crate sequencetree 0.1.4 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate sequencetree 0.1.4 on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 15 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.7.3 (available: v0.10.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4873265a3198265f3db103c61aca81ae1c3d918f986a4fe93c1f3e5e178d426
[INFO] running `Command { std: "docker" "start" "-a" "c4873265a3198265f3db103c61aca81ae1c3d918f986a4fe93c1f3e5e178d426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4873265a3198265f3db103c61aca81ae1c3d918f986a4fe93c1f3e5e178d426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4873265a3198265f3db103c61aca81ae1c3d918f986a4fe93c1f3e5e178d426", kill_on_drop: false }`
[INFO] [stdout] c4873265a3198265f3db103c61aca81ae1c3d918f986a4fe93c1f3e5e178d426
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca3510fb5b01fe5b6a55bc1ac809d0ae848ad051f11d8bc0da6b7b58ab285ba4
[INFO] running `Command { std: "docker" "start" "-a" "ca3510fb5b01fe5b6a55bc1ac809d0ae848ad051f11d8bc0da6b7b58ab285ba4", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling sequencetree v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]  --> src/binarysearchtree.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/binarysearchtree.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let mut val = match &mut n.val {
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/binarysearchtree.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let mut val = match &mut n.val {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/sequencetree.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let mut n = create_node(key, i, val);
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_value` is never used
[INFO] [stdout]   --> src/sequencetree.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl<K: PartialOrd + PartialEq + Copy + Default, T> Node<K, T> {
[INFO] [stdout]    | -------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn set_value(&mut self, val: T) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "ca3510fb5b01fe5b6a55bc1ac809d0ae848ad051f11d8bc0da6b7b58ab285ba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca3510fb5b01fe5b6a55bc1ac809d0ae848ad051f11d8bc0da6b7b58ab285ba4", kill_on_drop: false }`
[INFO] [stdout] ca3510fb5b01fe5b6a55bc1ac809d0ae848ad051f11d8bc0da6b7b58ab285ba4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 79f28481ce12e9a880704f7ca9f3f5fde0e93156db96af55c6fe986bd3bab9aa
[INFO] running `Command { std: "docker" "start" "-a" "79f28481ce12e9a880704f7ca9f3f5fde0e93156db96af55c6fe986bd3bab9aa", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling zerocopy v0.8.48
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]  --> src/binarysearchtree.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/binarysearchtree.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let mut val = match &mut n.val {
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/binarysearchtree.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let mut val = match &mut n.val {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/sequencetree.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let mut n = create_node(key, i, val);
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_value` is never used
[INFO] [stdout]   --> src/sequencetree.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl<K: PartialOrd + PartialEq + Copy + Default, T> Node<K, T> {
[INFO] [stdout]    | -------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn set_value(&mut self, val: T) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling sequencetree v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]  --> src/binarysearchtree.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]   --> src/lib.rs:11:21
[INFO] [stdout]    |
[INFO] [stdout] 11 |     use std::time::{Duration, Instant};
[INFO] [stdout]    |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::binarysearchtree::BTree`
[INFO] [stdout]   --> src/lib.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     use crate::binarysearchtree::BTree;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/binarysearchtree.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let mut val = match &mut n.val {
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/binarysearchtree.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |     let mut val = match &mut n.val {
[INFO] [stdout]     |         ----^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/sequencetree.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let mut n = create_node(key, i, val);
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |         for i in 0u64 .. TEST_SCALE {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `key` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:131:13
[INFO] [stdout]     |
[INFO] [stdout] 131 |         let mut key = String::new();
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_key` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `key` is never read
[INFO] [stdout]    --> src/lib.rs:133:13
[INFO] [stdout]     |
[INFO] [stdout] 133 |             key = gen_str(&mut rng);
[INFO] [stdout]     |             ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `set_value` is never used
[INFO] [stdout]   --> src/sequencetree.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl<K: PartialOrd + PartialEq + Copy + Default, T> Node<K, T> {
[INFO] [stdout]    | -------------------------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn set_value(&mut self, val: T) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 8.09s
[INFO] running `Command { std: "docker" "inspect" "79f28481ce12e9a880704f7ca9f3f5fde0e93156db96af55c6fe986bd3bab9aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79f28481ce12e9a880704f7ca9f3f5fde0e93156db96af55c6fe986bd3bab9aa", kill_on_drop: false }`
[INFO] [stdout] 79f28481ce12e9a880704f7ca9f3f5fde0e93156db96af55c6fe986bd3bab9aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 197d8d6fb34d59851539e25b9aafae06690e6382e140127bc3ba38f904efe029
[INFO] running `Command { std: "docker" "start" "-a" "197d8d6fb34d59851539e25b9aafae06690e6382e140127bc3ba38f904efe029", kill_on_drop: false }`
[INFO] [stderr] warning: only one of `license` or `license-file` is necessary
[INFO] [stderr] `license` should be used if the package license can be expressed with a standard SPDX expression.
[INFO] [stderr] `license-file` should be used if the package uses a non-standard license.
[INFO] [stderr] See https://doc.rust-lang.org/cargo/reference/manifest.html#the-license-and-license-file-fields for more information.
[INFO] [stderr] warning: unused import: `std::fmt::Debug`
[INFO] [stderr]  --> src/binarysearchtree.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::fmt::Debug;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/binarysearchtree.rs:81:9
[INFO] [stderr]    |
[INFO] [stderr] 81 |     let mut val = match &mut n.val {
[INFO] [stderr]    |         ----^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/binarysearchtree.rs:104:9
[INFO] [stderr]     |
[INFO] [stderr] 104 |     let mut val = match &mut n.val {
[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/sequencetree.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |     let mut n = create_node(key, i, val);
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method `set_value` is never used
[INFO] [stderr]   --> src/sequencetree.rs:30:8
[INFO] [stderr]    |
[INFO] [stderr]  9 | impl<K: PartialOrd + PartialEq + Copy + Default, T> Node<K, T> {
[INFO] [stderr]    | -------------------------------------------------------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 30 |     fn set_value(&mut self, val: T) {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `sequencetree` (lib) generated 5 warnings (run `cargo fix --lib -p sequencetree` to apply 4 suggestions)
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stderr]   --> src/lib.rs:11:21
[INFO] [stderr]    |
[INFO] [stderr] 11 |     use std::time::{Duration, Instant};
[INFO] [stderr]    |                     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::binarysearchtree::BTree`
[INFO] [stderr]   --> src/lib.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     use crate::binarysearchtree::BTree;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:123:13
[INFO] [stderr]     |
[INFO] [stderr] 123 |         for i in 0u64 .. TEST_SCALE {
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `key` is assigned to, but never used
[INFO] [stderr]    --> src/lib.rs:131:13
[INFO] [stderr]     |
[INFO] [stderr] 131 |         let mut key = String::new();
[INFO] [stderr]     |             ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: consider using `_key` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `key` is never read
[INFO] [stderr]    --> src/lib.rs:133:13
[INFO] [stderr]     |
[INFO] [stderr] 133 |             key = gen_str(&mut rng);
[INFO] [stderr]     |             ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `sequencetree` (lib test) generated 10 warnings (5 duplicates) (run `cargo fix --lib -p sequencetree --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/sequencetree-51c88ff70ea71d22)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::deletion ... ok
[INFO] [stdout] test tests::read_write_speed ... ok
[INFO] [stdout] test tests::accuracy ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.55s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests sequencetree
[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" "197d8d6fb34d59851539e25b9aafae06690e6382e140127bc3ba38f904efe029", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "197d8d6fb34d59851539e25b9aafae06690e6382e140127bc3ba38f904efe029", kill_on_drop: false }`
[INFO] [stdout] 197d8d6fb34d59851539e25b9aafae06690e6382e140127bc3ba38f904efe029
