[INFO] cloning repository https://github.com/efharkin/unlucky
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/efharkin/unlucky" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fefharkin%2Funlucky", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fefharkin%2Funlucky'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] df66f0c84df3a186705145fe7c1eaf6802de7033
[INFO] checking efharkin/unlucky against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fefharkin%2Funlucky" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/efharkin/unlucky on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/efharkin/unlucky
[INFO] finished tweaking git repo https://github.com/efharkin/unlucky
[INFO] tweaked toml for git repo https://github.com/efharkin/unlucky written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/efharkin/unlucky already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 74bce8d640297ca695f1aca224c0d73f87f78e6f4a24d3514b47e474a22cfc04
[INFO] running `Command { std: "docker" "start" "-a" "74bce8d640297ca695f1aca224c0d73f87f78e6f4a24d3514b47e474a22cfc04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74bce8d640297ca695f1aca224c0d73f87f78e6f4a24d3514b47e474a22cfc04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74bce8d640297ca695f1aca224c0d73f87f78e6f4a24d3514b47e474a22cfc04", kill_on_drop: false }`
[INFO] [stdout] 74bce8d640297ca695f1aca224c0d73f87f78e6f4a24d3514b47e474a22cfc04
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b82e65731ccb7978f81e225930959b240bd0840bdc1b982fac3e27074e146bf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5b82e65731ccb7978f81e225930959b240bd0840bdc1b982fac3e27074e146bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]     Checking how-bad-was-my-roll v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `roll_string`
[INFO] [stdout]  --> src/dice.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn parse_roll_string(roll_string: String) -> Result<Roll, String> {
[INFO] [stdout]   |                          ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_roll_string`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_roll_string`
[INFO] [stdout]  --> src/dice.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn parse_roll_string(roll_string: String) -> Result<Roll, String> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `strip_roll_prefix`
[INFO] [stdout]  --> src/dice.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn strip_roll_prefix<'s>(string: &'s str) -> &'s str {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `split_off_first_roll_item`
[INFO] [stdout]   --> src/dice.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn split_off_first_roll_item<'s>(roll_string: &'s str) -> (&'s str, &'s str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `ROLL_DEFAULT_CAPACITY`
[INFO] [stdout]    --> src/dice.rs:126:1
[INFO] [stdout]     |
[INFO] [stdout] 126 | static ROLL_DEFAULT_CAPACITY: usize = 8;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/dice.rs:130:12
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_d`
[INFO] [stdout]    --> src/dice.rs:139:12
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn add_d(&mut self, num_dice: u32, num_sides: u32) -> &mut Self {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_modifier`
[INFO] [stdout]    --> src/dice.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |     pub fn add_modifier(&mut self, modifier: i32) -> &mut Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `total_num_sides`
[INFO] [stdout]    --> src/dice.rs:159:12
[INFO] [stdout]     |
[INFO] [stdout] 159 |     pub fn total_num_sides(&self) -> u32 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `roll_string`
[INFO] [stdout]  --> src/dice.rs:1:26
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn parse_roll_string(roll_string: String) -> Result<Roll, String> {
[INFO] [stdout]   |                          ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_roll_string`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `ROLL_DEFAULT_CAPACITY`
[INFO] [stdout]    --> src/dice.rs:126:1
[INFO] [stdout]     |
[INFO] [stdout] 126 | static ROLL_DEFAULT_CAPACITY: usize = 8;
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/dice.rs:130:12
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_d`
[INFO] [stdout]    --> src/dice.rs:139:12
[INFO] [stdout]     |
[INFO] [stdout] 139 |     pub fn add_d(&mut self, num_dice: u32, num_sides: u32) -> &mut Self {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_modifier`
[INFO] [stdout]    --> src/dice.rs:146:12
[INFO] [stdout]     |
[INFO] [stdout] 146 |     pub fn add_modifier(&mut self, modifier: i32) -> &mut Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `total_num_sides`
[INFO] [stdout]    --> src/dice.rs:159:12
[INFO] [stdout]     |
[INFO] [stdout] 159 |     pub fn total_num_sides(&self) -> u32 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.18s
[INFO] running `Command { std: "docker" "inspect" "5b82e65731ccb7978f81e225930959b240bd0840bdc1b982fac3e27074e146bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b82e65731ccb7978f81e225930959b240bd0840bdc1b982fac3e27074e146bf", kill_on_drop: false }`
[INFO] [stdout] 5b82e65731ccb7978f81e225930959b240bd0840bdc1b982fac3e27074e146bf