[INFO] cloning repository https://github.com/ffloyd/pair_gen
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ffloyd/pair_gen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fffloyd%2Fpair_gen", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fffloyd%2Fpair_gen'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3110389bfb577a3a9c894bbbd2c496ee6b69d74e
[INFO] checking ffloyd/pair_gen against try#3a4cb0edb4040379c037e06efeb5409e44be7b77 for pr-146377
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fffloyd%2Fpair_gen" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ffloyd/pair_gen
[INFO] finished tweaking git repo https://github.com/ffloyd/pair_gen
[INFO] tweaked toml for git repo https://github.com/ffloyd/pair_gen written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ffloyd/pair_gen on toolchain 3a4cb0edb4040379c037e06efeb5409e44be7b77
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4cb0edb4040379c037e06efeb5409e44be7b77" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ffloyd/pair_gen 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" "+3a4cb0edb4040379c037e06efeb5409e44be7b77" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4cb0edb4040379c037e06efeb5409e44be7b77" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d46eab61637e1cdb1a073867cf9c1ea1d652f3f1fe4af712e9fe4896ad6e8942
[INFO] running `Command { std: "docker" "start" "-a" "d46eab61637e1cdb1a073867cf9c1ea1d652f3f1fe4af712e9fe4896ad6e8942", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d46eab61637e1cdb1a073867cf9c1ea1d652f3f1fe4af712e9fe4896ad6e8942", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d46eab61637e1cdb1a073867cf9c1ea1d652f3f1fe4af712e9fe4896ad6e8942", kill_on_drop: false }`
[INFO] [stdout] d46eab61637e1cdb1a073867cf9c1ea1d652f3f1fe4af712e9fe4896ad6e8942
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4cb0edb4040379c037e06efeb5409e44be7b77" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93134f1e4aa8d5acb6b219607e7f37b539b3811262c1783f3145ddb84f2091aa
[INFO] running `Command { std: "docker" "start" "-a" "93134f1e4aa8d5acb6b219607e7f37b539b3811262c1783f3145ddb84f2091aa", kill_on_drop: false }`
[INFO] [stderr]     Checking pair_gen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `names`
[INFO] [stdout]    --> src/main.rs:297:9
[INFO] [stdout]     |
[INFO] [stdout] 297 |     let names = Set::from([
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_names`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/main.rs:306:9
[INFO] [stdout]     |
[INFO] [stdout] 306 |     let exp = Set::from(["Erik", "Iuri", "Max", "Moritz", "Tuomo", "Ema"]);
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `exclude` is never used
[INFO] [stdout]   --> src/main.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<T: Ord + Copy> History<T> {
[INFO] [stdout]    | ------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 92 |     fn exclude(&mut self, pairs: &Set<(T, 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: unused variable: `names`
[INFO] [stdout]    --> src/main.rs:297:9
[INFO] [stdout]     |
[INFO] [stdout] 297 |     let names = Set::from([
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_names`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `exp`
[INFO] [stdout]    --> src/main.rs:306:9
[INFO] [stdout]     |
[INFO] [stdout] 306 |     let exp = Set::from(["Erik", "Iuri", "Max", "Moritz", "Tuomo", "Ema"]);
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_exp`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `exclude` is never used
[INFO] [stdout]   --> src/main.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 61 | impl<T: Ord + Copy> History<T> {
[INFO] [stdout]    | ------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 92 |     fn exclude(&mut self, pairs: &Set<(T, T)>) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "93134f1e4aa8d5acb6b219607e7f37b539b3811262c1783f3145ddb84f2091aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93134f1e4aa8d5acb6b219607e7f37b539b3811262c1783f3145ddb84f2091aa", kill_on_drop: false }`
[INFO] [stdout] 93134f1e4aa8d5acb6b219607e7f37b539b3811262c1783f3145ddb84f2091aa