[INFO] cloning repository https://github.com/keatinge/rust-schedule-optimizer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/keatinge/rust-schedule-optimizer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeatinge%2Frust-schedule-optimizer", kill_on_drop: false }`
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[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
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[INFO] checking keatinge/rust-schedule-optimizer against master#4a0ee3cdc66573c8b46471462db7088a89d25183 for pr-102513-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkeatinge%2Frust-schedule-optimizer" "/workspace/builds/worker-5/source", kill_on_drop: false }`
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[INFO] validating manifest of git repo https://github.com/keatinge/rust-schedule-optimizer on toolchain 4a0ee3cdc66573c8b46471462db7088a89d25183
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[INFO] finished tweaking git repo https://github.com/keatinge/rust-schedule-optimizer
[INFO] tweaked toml for git repo https://github.com/keatinge/rust-schedule-optimizer written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/keatinge/rust-schedule-optimizer already has a lockfile, it will not be regenerated
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:3d1cd00eb6e6ea2a7969240779edeaeff35b24be85036c63b883ba933028a15f" "/opt/rustwide/cargo-home/bin/cargo" "+4a0ee3cdc66573c8b46471462db7088a89d25183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] [stderr]    Compiling rand v0.3.22
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[INFO] [stderr]     Checking sched v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Equal`
[INFO] [stdout]  --> src/main.rs:5:32
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::cmp::Ordering::{Less, Equal, Greater};
[INFO] [stdout]   |                                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Attr`, `Predicate`
[INFO] [stdout]  --> src/main.rs:8:25
[INFO] [stdout]   |
[INFO] [stdout] 8 | use select::predicate::{Predicate, Attr, Class as HTMLClass, Name, And};
[INFO] [stdout]   |                         ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Equal`
[INFO] [stdout]  --> src/main.rs:5:32
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::cmp::Ordering::{Less, Equal, Greater};
[INFO] [stdout]   |                                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Attr`, `Predicate`
[INFO] [stdout]  --> src/main.rs:8:25
[INFO] [stdout]   |
[INFO] [stdout] 8 | use select::predicate::{Predicate, Attr, Class as HTMLClass, Name, And};
[INFO] [stdout]   |                         ^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CRN_INDEX` is never used
[INFO] [stdout]   --> src/main.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const CRN_INDEX:usize = 1_usize;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INSTRUCTOR_INDEX` is never used
[INFO] [stdout]   --> src/main.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const INSTRUCTOR_INDEX:usize = 19_usize;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LOC_INDEX` is never used
[INFO] [stdout]   --> src/main.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const LOC_INDEX:usize = 21_usize;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `course_num` is never read
[INFO] [stdout]   --> src/main.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 87 | struct Section<'a> {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 90 |     course_num: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Section` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Class` is never constructed
[INFO] [stdout]    --> src/main.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | struct Class<'a> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `department` are never read
[INFO] [stdout]    --> src/main.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 127 | struct Course<'a> {
[INFO] [stdout]     |        ------ fields in this struct
[INFO] [stdout] 128 |     name: &'a str,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 129 |     department: &'a str,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Course` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_stack` is never used
[INFO] [stdout]    --> src/main.rs:145:4
[INFO] [stdout]     |
[INFO] [stdout] 145 | fn print_stack(stack: &[&Section]) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:196:21
[INFO] [stdout]     |
[INFO] [stdout] 196 |             assert!(day >= 0 && day < 7);
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `SHOULD_PRUNE` should have a snake case name
[INFO] [stdout]    --> src/main.rs:673:9
[INFO] [stdout]     |
[INFO] [stdout] 673 |     let SHOULD_PRUNE = true;
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: convert the identifier to snake case: `should_prune`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:688:5
[INFO] [stdout]     |
[INFO] [stdout] 688 |     file.write_all(full_data.as_bytes());
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CRN_INDEX` is never used
[INFO] [stdout]   --> src/main.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const CRN_INDEX:usize = 1_usize;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `INSTRUCTOR_INDEX` is never used
[INFO] [stdout]   --> src/main.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const INSTRUCTOR_INDEX:usize = 19_usize;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LOC_INDEX` is never used
[INFO] [stdout]   --> src/main.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const LOC_INDEX:usize = 21_usize;
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `course_num` is never read
[INFO] [stdout]   --> src/main.rs:90:5
[INFO] [stdout]    |
[INFO] [stdout] 87 | struct Section<'a> {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 90 |     course_num: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Section` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Class` is never constructed
[INFO] [stdout]    --> src/main.rs:120:8
[INFO] [stdout]     |
[INFO] [stdout] 120 | struct Class<'a> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `department` are never read
[INFO] [stdout]    --> src/main.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 127 | struct Course<'a> {
[INFO] [stdout]     |        ------ fields in this struct
[INFO] [stdout] 128 |     name: &'a str,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 129 |     department: &'a str,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Course` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_stack` is never used
[INFO] [stdout]    --> src/main.rs:145:4
[INFO] [stdout]     |
[INFO] [stdout] 145 | fn print_stack(stack: &[&Section]) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]    --> src/main.rs:196:21
[INFO] [stdout]     |
[INFO] [stdout] 196 |             assert!(day >= 0 && day < 7);
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `SHOULD_PRUNE` should have a snake case name
[INFO] [stdout]    --> src/main.rs:673:9
[INFO] [stdout]     |
[INFO] [stdout] 673 |     let SHOULD_PRUNE = true;
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: convert the identifier to snake case: `should_prune`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:688:5
[INFO] [stdout]     |
[INFO] [stdout] 688 |     file.write_all(full_data.as_bytes());
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.07s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: tendril v0.3.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "2d1aad20e1f7bb339aa91a8ee6109e2bcff8924aa3f47069287bebfa5e0ff41e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d1aad20e1f7bb339aa91a8ee6109e2bcff8924aa3f47069287bebfa5e0ff41e", kill_on_drop: false }`
[INFO] [stdout] 2d1aad20e1f7bb339aa91a8ee6109e2bcff8924aa3f47069287bebfa5e0ff41e