[INFO] cloning repository https://github.com/binliexc/LineSegmentTree-
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/binliexc/LineSegmentTree-" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinliexc%2FLineSegmentTree-", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinliexc%2FLineSegmentTree-'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 00ae9e9473f21efba1f327604c79cb5202457b32
[INFO] checking binliexc/LineSegmentTree- against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinliexc%2FLineSegmentTree-" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/binliexc/LineSegmentTree-
[INFO] finished tweaking git repo https://github.com/binliexc/LineSegmentTree-
[INFO] tweaked toml for git repo https://github.com/binliexc/LineSegmentTree- written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/binliexc/LineSegmentTree- on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/binliexc/LineSegmentTree- 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 456150c1641a070234a5db80f6d87332cd0c88ebfd18b23351d905138e834fdc
[INFO] running `Command { std: "docker" "start" "-a" "456150c1641a070234a5db80f6d87332cd0c88ebfd18b23351d905138e834fdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "456150c1641a070234a5db80f6d87332cd0c88ebfd18b23351d905138e834fdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "456150c1641a070234a5db80f6d87332cd0c88ebfd18b23351d905138e834fdc", kill_on_drop: false }`
[INFO] [stdout] 456150c1641a070234a5db80f6d87332cd0c88ebfd18b23351d905138e834fdc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 324268218b2505cd27fc8b544baf36a85dc9572563e2f6a03207e0471cca3091
[INFO] running `Command { std: "docker" "start" "-a" "324268218b2505cd27fc8b544baf36a85dc9572563e2f6a03207e0471cca3091", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.161
[INFO] [stderr]    Compiling syn v2.0.85
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking clrs_algorithms v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(once_cell_get_mut)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread::sleep`
[INFO] [stdout]  --> src/line_segment_tree.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     thread::sleep,
[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: `std::process::id`
[INFO] [stdout]  --> src/binary_indexed_tree.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::process::id;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(once_cell_get_mut)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread::sleep`
[INFO] [stdout]  --> src/line_segment_tree.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     thread::sleep,
[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: `std::process::id`
[INFO] [stdout]  --> src/binary_indexed_tree.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::process::id;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/basic_difference.rs:31:17
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn max_flow(n: usize, pipes: &[(usize, usize)], paths: &[(usize, usize)]) -> isize {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pipes`
[INFO] [stdout]   --> src/basic_difference.rs:31:27
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn max_flow(n: usize, pipes: &[(usize, usize)], paths: &[(usize, usize)]) -> isize {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_pipes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `paths`
[INFO] [stdout]   --> src/basic_difference.rs:31:53
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn max_flow(n: usize, pipes: &[(usize, usize)], paths: &[(usize, usize)]) -> isize {
[INFO] [stdout]    |                                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_paths`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/graph/basic/dfs.rs:145:43
[INFO] [stdout]     |
[INFO] [stdout] 145 | pub fn topological_sort(s: char, e: char, mut edges: Vec<(char, char)>) -> Vec<char> {
[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] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `clrs_algorithms` (lib) due to 1 previous error; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/basic_difference.rs:31:17
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn max_flow(n: usize, pipes: &[(usize, usize)], paths: &[(usize, usize)]) -> isize {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pipes`
[INFO] [stdout]   --> src/basic_difference.rs:31:27
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn max_flow(n: usize, pipes: &[(usize, usize)], paths: &[(usize, usize)]) -> isize {
[INFO] [stdout]    |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_pipes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `paths`
[INFO] [stdout]   --> src/basic_difference.rs:31:53
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn max_flow(n: usize, pipes: &[(usize, usize)], paths: &[(usize, usize)]) -> isize {
[INFO] [stdout]    |                                                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_paths`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/disjoint_set/offline_minimum.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 |         let mut seq = vec!['4', '8', 'E', '3', 'E', '9', '2', '6', 'E', 'E', 'E', '1', '7', 'E', '5'];
[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/graph/basic/dfs.rs:145:43
[INFO] [stdout]     |
[INFO] [stdout] 145 | pub fn topological_sort(s: char, e: char, mut edges: Vec<(char, char)>) -> Vec<char> {
[INFO] [stdout]     |                                           ----^^^^^
[INFO] [stdout]     |                                           |
[INFO] [stdout]     |                                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order`
[INFO] [stdout]    --> src/graph/basic/scc.rs:124:13
[INFO] [stdout]     |
[INFO] [stdout] 124 |         let order = dfs_order(&mut al);
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `clrs_algorithms` (lib test) due to 1 previous error; 8 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "324268218b2505cd27fc8b544baf36a85dc9572563e2f6a03207e0471cca3091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "324268218b2505cd27fc8b544baf36a85dc9572563e2f6a03207e0471cca3091", kill_on_drop: false }`
[INFO] [stdout] 324268218b2505cd27fc8b544baf36a85dc9572563e2f6a03207e0471cca3091
