[INFO] cloning repository https://github.com/ose20/oselib
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ose20/oselib" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fose20%2Foselib", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fose20%2Foselib'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7564e17742da0f25ee636e02a813a68fccd40554
[INFO] testing ose20/oselib against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fose20%2Foselib" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ose20/oselib
[INFO] finished tweaking git repo https://github.com/ose20/oselib
[INFO] tweaked toml for git repo https://github.com/ose20/oselib written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ose20/oselib on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ose20/oselib 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4389aa3e1b111c51a58bd050832a776250481e047455def5443665de47df4bd
[INFO] running `Command { std: "docker" "start" "-a" "c4389aa3e1b111c51a58bd050832a776250481e047455def5443665de47df4bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4389aa3e1b111c51a58bd050832a776250481e047455def5443665de47df4bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4389aa3e1b111c51a58bd050832a776250481e047455def5443665de47df4bd", kill_on_drop: false }`
[INFO] [stdout] c4389aa3e1b111c51a58bd050832a776250481e047455def5443665de47df4bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40732881df2a576c17db4dcc71dd43b32dc1fb17c6b178f2851dd0cc3d93c8c4
[INFO] running `Command { std: "docker" "start" "-a" "40732881df2a576c17db4dcc71dd43b32dc1fb17c6b178f2851dd0cc3d93c8c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling oselib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:144:13
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let mut t = vec![0; len + 1];
[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: unused variable: `t`
[INFO] [stdout]    --> src/lib.rs:144:13
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let mut t = vec![0; len + 1];
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CumulativeSum` is never constructed
[INFO] [stdout]  --> src/lib.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct CumulativeSum<T>
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `get_interval_sum` are never used
[INFO] [stdout]   --> src/lib.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | / impl<T> CumulativeSum<T>
[INFO] [stdout] 16 | | where
[INFO] [stdout] 17 | |     T: Add<Output = T> + Sub<Output = T> + Copy,
[INFO] [stdout]    | |________________________________________________- associated items in this implementation
[INFO] [stdout] 18 |   {
[INFO] [stdout] 19 |       fn new(v: &Vec<T>) -> CumulativeSum<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |       fn get_interval_sum(&self, left: usize, right: usize) -> Result<T, String> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Comb` is never constructed
[INFO] [stdout]   --> src/lib.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct Comb {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `init` and `com` are never used
[INFO] [stdout]   --> src/lib.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Comb {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 67 |     fn init(n: i64, modulo: i64) -> Comb {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 97 |     fn com(&self, n: i64, k: i64) -> i64 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StringHash` is never constructed
[INFO] [stdout]    --> src/lib.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 | struct StringHash {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `alpha_to_u64`, `init`, and `hash` are never used
[INFO] [stdout]    --> src/lib.rs:132:8
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl StringHash {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout] 132 |     fn alpha_to_u64(c: char) -> Option<u64> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 139 |     fn init(string: &String) -> StringHash {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 172 |     fn hash(&self, l: usize, r: usize) -> u64 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Monoid` is never used
[INFO] [stdout]    --> src/lib.rs:188:7
[INFO] [stdout]     |
[INFO] [stdout] 188 | trait Monoid {
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SegmentTree` is never constructed
[INFO] [stdout]    --> src/lib.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 200 | struct SegmentTree<T: Monoid> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `init`, `update`, and `fold` are never used
[INFO] [stdout]    --> src/lib.rs:215:8
[INFO] [stdout]     |
[INFO] [stdout] 209 | / impl<T> SegmentTree<T>
[INFO] [stdout] 210 | | where
[INFO] [stdout] 211 | |     T: Monoid + Clone + Copy,
[INFO] [stdout]     | |_____________________________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 215 |       fn init(v: &Vec<T>) -> SegmentTree<T> {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 237 |       fn update(&mut self, i: usize, val: T) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 256 |       fn fold(&self, l: usize, r: usize) -> T {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dijkstra` is never used
[INFO] [stdout]    --> src/lib.rs:300:4
[INFO] [stdout]     |
[INFO] [stdout] 300 | fn dijkstra(start: usize, adj: &Vec<Vec<(usize, usize)>>) -> Vec<usize> {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnionFind` is never constructed
[INFO] [stdout]    --> src/lib.rs:330:8
[INFO] [stdout]     |
[INFO] [stdout] 330 | struct UnionFind {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `init`, `root`, `is_same`, `unite`, and `size` are never used
[INFO] [stdout]    --> src/lib.rs:341:8
[INFO] [stdout]     |
[INFO] [stdout] 340 | impl UnionFind {
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] 341 |     fn init(n: usize) -> Self {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 349 |     fn root(&mut self, x: usize) -> usize {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 358 |     fn is_same(&mut self, x: usize, y: usize) -> bool {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 362 |     fn unite(&mut self, x: usize, y: usize) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 385 |     fn size(&mut self, x: usize) -> usize {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "40732881df2a576c17db4dcc71dd43b32dc1fb17c6b178f2851dd0cc3d93c8c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40732881df2a576c17db4dcc71dd43b32dc1fb17c6b178f2851dd0cc3d93c8c4", kill_on_drop: false }`
[INFO] [stdout] 40732881df2a576c17db4dcc71dd43b32dc1fb17c6b178f2851dd0cc3d93c8c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40a30c2387a55a65070e74a694ff85e0a3694db5d6517c292c501c11df5dd582
[INFO] running `Command { std: "docker" "start" "-a" "40a30c2387a55a65070e74a694ff85e0a3694db5d6517c292c501c11df5dd582", kill_on_drop: false }`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:144:13
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let mut t = vec![0; len + 1];
[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: unused variable: `t`
[INFO] [stdout]    --> src/lib.rs:144:13
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let mut t = vec![0; len + 1];
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CumulativeSum` is never constructed
[INFO] [stdout]  --> src/lib.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct CumulativeSum<T>
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `get_interval_sum` are never used
[INFO] [stdout]   --> src/lib.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | / impl<T> CumulativeSum<T>
[INFO] [stdout] 16 | | where
[INFO] [stdout] 17 | |     T: Add<Output = T> + Sub<Output = T> + Copy,
[INFO] [stdout]    | |________________________________________________- associated items in this implementation
[INFO] [stdout] 18 |   {
[INFO] [stdout] 19 |       fn new(v: &Vec<T>) -> CumulativeSum<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |       fn get_interval_sum(&self, left: usize, right: usize) -> Result<T, String> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Comb` is never constructed
[INFO] [stdout]   --> src/lib.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct Comb {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `init` and `com` are never used
[INFO] [stdout]   --> src/lib.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Comb {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 67 |     fn init(n: i64, modulo: i64) -> Comb {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 97 |     fn com(&self, n: i64, k: i64) -> i64 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StringHash` is never constructed
[INFO] [stdout]    --> src/lib.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 | struct StringHash {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `alpha_to_u64`, `init`, and `hash` are never used
[INFO] [stdout]    --> src/lib.rs:132:8
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl StringHash {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout] 132 |     fn alpha_to_u64(c: char) -> Option<u64> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 139 |     fn init(string: &String) -> StringHash {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 172 |     fn hash(&self, l: usize, r: usize) -> u64 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Monoid` is never used
[INFO] [stdout]    --> src/lib.rs:188:7
[INFO] [stdout]     |
[INFO] [stdout] 188 | trait Monoid {
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SegmentTree` is never constructed
[INFO] [stdout]    --> src/lib.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 200 | struct SegmentTree<T: Monoid> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `init`, `update`, and `fold` are never used
[INFO] [stdout]    --> src/lib.rs:215:8
[INFO] [stdout]     |
[INFO] [stdout] 209 | / impl<T> SegmentTree<T>
[INFO] [stdout] 210 | | where
[INFO] [stdout] 211 | |     T: Monoid + Clone + Copy,
[INFO] [stdout]     | |_____________________________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 215 |       fn init(v: &Vec<T>) -> SegmentTree<T> {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 237 |       fn update(&mut self, i: usize, val: T) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 256 |       fn fold(&self, l: usize, r: usize) -> T {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dijkstra` is never used
[INFO] [stdout]    --> src/lib.rs:300:4
[INFO] [stdout]     |
[INFO] [stdout] 300 | fn dijkstra(start: usize, adj: &Vec<Vec<(usize, usize)>>) -> Vec<usize> {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnionFind` is never constructed
[INFO] [stdout]    --> src/lib.rs:330:8
[INFO] [stdout]     |
[INFO] [stdout] 330 | struct UnionFind {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `init`, `root`, `is_same`, `unite`, and `size` are never used
[INFO] [stdout]    --> src/lib.rs:341:8
[INFO] [stdout]     |
[INFO] [stdout] 340 | impl UnionFind {
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] 341 |     fn init(n: usize) -> Self {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 349 |     fn root(&mut self, x: usize) -> usize {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 358 |     fn is_same(&mut self, x: usize, y: usize) -> bool {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 362 |     fn unite(&mut self, x: usize, y: usize) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 385 |     fn size(&mut self, x: usize) -> usize {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling oselib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:144:13
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let mut t = vec![0; len + 1];
[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: unused variable: `t`
[INFO] [stdout]    --> src/lib.rs:144:13
[INFO] [stdout]     |
[INFO] [stdout] 144 |         let mut t = vec![0; len + 1];
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CumulativeSum` is never constructed
[INFO] [stdout]  --> src/lib.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct CumulativeSum<T>
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `get_interval_sum` are never used
[INFO] [stdout]   --> src/lib.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | / impl<T> CumulativeSum<T>
[INFO] [stdout] 16 | | where
[INFO] [stdout] 17 | |     T: Add<Output = T> + Sub<Output = T> + Copy,
[INFO] [stdout]    | |________________________________________________- associated items in this implementation
[INFO] [stdout] 18 |   {
[INFO] [stdout] 19 |       fn new(v: &Vec<T>) -> CumulativeSum<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |       fn get_interval_sum(&self, left: usize, right: usize) -> Result<T, String> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Comb` is never constructed
[INFO] [stdout]   --> src/lib.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | struct Comb {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `init` and `com` are never used
[INFO] [stdout]   --> src/lib.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | impl Comb {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 67 |     fn init(n: i64, modulo: i64) -> Comb {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 97 |     fn com(&self, n: i64, k: i64) -> i64 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StringHash` is never constructed
[INFO] [stdout]    --> src/lib.rs:118:8
[INFO] [stdout]     |
[INFO] [stdout] 118 | struct StringHash {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `alpha_to_u64`, `init`, and `hash` are never used
[INFO] [stdout]    --> src/lib.rs:132:8
[INFO] [stdout]     |
[INFO] [stdout] 131 | impl StringHash {
[INFO] [stdout]     | --------------- associated items in this implementation
[INFO] [stdout] 132 |     fn alpha_to_u64(c: char) -> Option<u64> {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 139 |     fn init(string: &String) -> StringHash {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 172 |     fn hash(&self, l: usize, r: usize) -> u64 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Monoid` is never used
[INFO] [stdout]    --> src/lib.rs:188:7
[INFO] [stdout]     |
[INFO] [stdout] 188 | trait Monoid {
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SegmentTree` is never constructed
[INFO] [stdout]    --> src/lib.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 200 | struct SegmentTree<T: Monoid> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `init`, `update`, and `fold` are never used
[INFO] [stdout]    --> src/lib.rs:215:8
[INFO] [stdout]     |
[INFO] [stdout] 209 | / impl<T> SegmentTree<T>
[INFO] [stdout] 210 | | where
[INFO] [stdout] 211 | |     T: Monoid + Clone + Copy,
[INFO] [stdout]     | |_____________________________- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 215 |       fn init(v: &Vec<T>) -> SegmentTree<T> {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 237 |       fn update(&mut self, i: usize, val: T) {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 256 |       fn fold(&self, l: usize, r: usize) -> T {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dijkstra` is never used
[INFO] [stdout]    --> src/lib.rs:300:4
[INFO] [stdout]     |
[INFO] [stdout] 300 | fn dijkstra(start: usize, adj: &Vec<Vec<(usize, usize)>>) -> Vec<usize> {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnionFind` is never constructed
[INFO] [stdout]    --> src/lib.rs:330:8
[INFO] [stdout]     |
[INFO] [stdout] 330 | struct UnionFind {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `init`, `root`, `is_same`, `unite`, and `size` are never used
[INFO] [stdout]    --> src/lib.rs:341:8
[INFO] [stdout]     |
[INFO] [stdout] 340 | impl UnionFind {
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] 341 |     fn init(n: usize) -> Self {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 349 |     fn root(&mut self, x: usize) -> usize {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 358 |     fn is_same(&mut self, x: usize, y: usize) -> bool {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 362 |     fn unite(&mut self, x: usize, y: usize) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 385 |     fn size(&mut self, x: usize) -> usize {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "40a30c2387a55a65070e74a694ff85e0a3694db5d6517c292c501c11df5dd582", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40a30c2387a55a65070e74a694ff85e0a3694db5d6517c292c501c11df5dd582", kill_on_drop: false }`
[INFO] [stdout] 40a30c2387a55a65070e74a694ff85e0a3694db5d6517c292c501c11df5dd582
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 13b14d4a67dd7e38f4fed484054667edfd8ddf49e564a5fb977722d3f0a2522c
[INFO] running `Command { std: "docker" "start" "-a" "13b14d4a67dd7e38f4fed484054667edfd8ddf49e564a5fb977722d3f0a2522c", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:144:13
[INFO] [stderr]     |
[INFO] [stderr] 144 |         let mut t = vec![0; len + 1];
[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: unused variable: `t`
[INFO] [stderr]    --> src/lib.rs:144:13
[INFO] [stderr]     |
[INFO] [stderr] 144 |         let mut t = vec![0; len + 1];
[INFO] [stderr]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `CumulativeSum` is never constructed
[INFO] [stderr]  --> src/lib.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct CumulativeSum<T>
[INFO] [stderr]   |        ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `get_interval_sum` are never used
[INFO] [stderr]   --> src/lib.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | / impl<T> CumulativeSum<T>
[INFO] [stderr] 16 | | where
[INFO] [stderr] 17 | |     T: Add<Output = T> + Sub<Output = T> + Copy,
[INFO] [stderr]    | |________________________________________________- associated items in this implementation
[INFO] [stderr] 18 |   {
[INFO] [stderr] 19 |       fn new(v: &Vec<T>) -> CumulativeSum<T> {
[INFO] [stderr]    |          ^^^
[INFO] [stderr] ...
[INFO] [stderr] 30 |       fn get_interval_sum(&self, left: usize, right: usize) -> Result<T, String> {
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Comb` is never constructed
[INFO] [stderr]   --> src/lib.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 | struct Comb {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `init` and `com` are never used
[INFO] [stderr]   --> src/lib.rs:67:8
[INFO] [stderr]    |
[INFO] [stderr] 66 | impl Comb {
[INFO] [stderr]    | --------- associated items in this implementation
[INFO] [stderr] 67 |     fn init(n: i64, modulo: i64) -> Comb {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 97 |     fn com(&self, n: i64, k: i64) -> i64 {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `StringHash` is never constructed
[INFO] [stderr]    --> src/lib.rs:118:8
[INFO] [stderr]     |
[INFO] [stderr] 118 | struct StringHash {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `alpha_to_u64`, `init`, and `hash` are never used
[INFO] [stderr]    --> src/lib.rs:132:8
[INFO] [stderr]     |
[INFO] [stderr] 131 | impl StringHash {
[INFO] [stderr]     | --------------- associated items in this implementation
[INFO] [stderr] 132 |     fn alpha_to_u64(c: char) -> Option<u64> {
[INFO] [stderr]     |        ^^^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 139 |     fn init(string: &String) -> StringHash {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 172 |     fn hash(&self, l: usize, r: usize) -> u64 {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `Monoid` is never used
[INFO] [stderr]    --> src/lib.rs:188:7
[INFO] [stderr]     |
[INFO] [stderr] 188 | trait Monoid {
[INFO] [stderr]     |       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `SegmentTree` is never constructed
[INFO] [stderr]    --> src/lib.rs:200:8
[INFO] [stderr]     |
[INFO] [stderr] 200 | struct SegmentTree<T: Monoid> {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `init`, `update`, and `fold` are never used
[INFO] [stderr]    --> src/lib.rs:215:8
[INFO] [stderr]     |
[INFO] [stderr] 209 | / impl<T> SegmentTree<T>
[INFO] [stderr] 210 | | where
[INFO] [stderr] 211 | |     T: Monoid + Clone + Copy,
[INFO] [stderr]     | |_____________________________- associated items in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 215 |       fn init(v: &Vec<T>) -> SegmentTree<T> {
[INFO] [stderr]     |          ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 237 |       fn update(&mut self, i: usize, val: T) {
[INFO] [stderr]     |          ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 256 |       fn fold(&self, l: usize, r: usize) -> T {
[INFO] [stderr]     |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `dijkstra` is never used
[INFO] [stderr]    --> src/lib.rs:300:4
[INFO] [stderr]     |
[INFO] [stderr] 300 | fn dijkstra(start: usize, adj: &Vec<Vec<(usize, usize)>>) -> Vec<usize> {
[INFO] [stderr]     |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct `UnionFind` is never constructed
[INFO] [stderr]    --> src/lib.rs:330:8
[INFO] [stderr]     |
[INFO] [stderr] 330 | struct UnionFind {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `init`, `root`, `is_same`, `unite`, and `size` are never used
[INFO] [stderr]    --> src/lib.rs:341:8
[INFO] [stderr]     |
[INFO] [stderr] 340 | impl UnionFind {
[INFO] [stderr]     | -------------- associated items in this implementation
[INFO] [stderr] 341 |     fn init(n: usize) -> Self {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 349 |     fn root(&mut self, x: usize) -> usize {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 358 |     fn is_same(&mut self, x: usize, y: usize) -> bool {
[INFO] [stderr]     |        ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 362 |     fn unite(&mut self, x: usize, y: usize) {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 385 |     fn size(&mut self, x: usize) -> usize {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `oselib` (lib) generated 14 warnings (run `cargo fix --lib -p oselib` to apply 2 suggestions)
[INFO] [stderr] warning: `oselib` (lib test) generated 14 warnings (14 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/oselib-466dd996e6958536)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr]    Doc-tests oselib
[INFO] [stdout] test tests::test_modinv ... ok
[INFO] [stdout] test tests::test_ext_gcd ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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" "13b14d4a67dd7e38f4fed484054667edfd8ddf49e564a5fb977722d3f0a2522c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13b14d4a67dd7e38f4fed484054667edfd8ddf49e564a5fb977722d3f0a2522c", kill_on_drop: false }`
[INFO] [stdout] 13b14d4a67dd7e38f4fed484054667edfd8ddf49e564a5fb977722d3f0a2522c
