[INFO] cloning repository https://github.com/grandmasponge/UselessSets
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/grandmasponge/UselessSets" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrandmasponge%2FUselessSets", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrandmasponge%2FUselessSets'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8c6ff9699fa9d2005bb67f874d4baf063a26ae69
[INFO] checking grandmasponge/UselessSets against try#e90f1ff63e694965281f833819a486da29772bdf for pr-146167
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrandmasponge%2FUselessSets" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/grandmasponge/UselessSets
[INFO] finished tweaking git repo https://github.com/grandmasponge/UselessSets
[INFO] tweaked toml for git repo https://github.com/grandmasponge/UselessSets written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/grandmasponge/UselessSets on toolchain e90f1ff63e694965281f833819a486da29772bdf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e90f1ff63e694965281f833819a486da29772bdf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/grandmasponge/UselessSets 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" "+e90f1ff63e694965281f833819a486da29772bdf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+e90f1ff63e694965281f833819a486da29772bdf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 986223bf9e477fe6efb56df6df4250c85aec26db2185b9328028c3e3e1130985
[INFO] running `Command { std: "docker" "start" "-a" "986223bf9e477fe6efb56df6df4250c85aec26db2185b9328028c3e3e1130985", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "986223bf9e477fe6efb56df6df4250c85aec26db2185b9328028c3e3e1130985", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "986223bf9e477fe6efb56df6df4250c85aec26db2185b9328028c3e3e1130985", kill_on_drop: false }`
[INFO] [stdout] 986223bf9e477fe6efb56df6df4250c85aec26db2185b9328028c3e3e1130985
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+e90f1ff63e694965281f833819a486da29772bdf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9680b9ca0e1c9bee41634a48ae1c95385d9e1bef8d4ce468bbae7e96fa2b2ad
[INFO] running `Command { std: "docker" "start" "-a" "d9680b9ca0e1c9bee41634a48ae1c95385d9e1bef8d4ce468bbae7e96fa2b2ad", kill_on_drop: false }`
[INFO] [stderr]     Checking sets v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `SetDataTypes`
[INFO] [stdout]  --> src/main.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::elements::{Elements, SetDataTypes};
[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: `SetDataTypes`
[INFO] [stdout]  --> src/main.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::elements::{Elements, SetDataTypes};
[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/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut s2 = sets::Set::SetfromHashSet(se2);
[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/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut s2 = sets::Set::SetfromHashSet(se2);
[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: variant `None` is never constructed
[INFO] [stdout]  --> src/error.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum SetErrorType {
[INFO] [stdout]   |          ------------ variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 5 |     None,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `SetErrorType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `error_type` and `msg` are never read
[INFO] [stdout]   --> src/error.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct SetError {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 10 |     error_type: SetErrorType,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 11 |     msg: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SetError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]  --> src/error.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum SetErrorType {
[INFO] [stdout]   |          ------------ variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 5 |     None,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `SetErrorType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `error_type` and `msg` are never read
[INFO] [stdout]   --> src/error.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct SetError {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 10 |     error_type: SetErrorType,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 11 |     msg: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SetError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `SetfromHashSet` should have a snake case name
[INFO] [stdout]   --> src/sets.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn SetfromHashSet(elements: HashSet<Elements>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^ help: convert the identifier to snake case: `setfrom_hash_set`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `SetfromHashSet` should have a snake case name
[INFO] [stdout]   --> src/sets.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn SetfromHashSet(elements: HashSet<Elements>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^ help: convert the identifier to snake case: `setfrom_hash_set`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "d9680b9ca0e1c9bee41634a48ae1c95385d9e1bef8d4ce468bbae7e96fa2b2ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9680b9ca0e1c9bee41634a48ae1c95385d9e1bef8d4ce468bbae7e96fa2b2ad", kill_on_drop: false }`
[INFO] [stdout] d9680b9ca0e1c9bee41634a48ae1c95385d9e1bef8d4ce468bbae7e96fa2b2ad