[INFO] cloning repository https://github.com/terror/euler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/terror/euler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fterror%2Feuler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fterror%2Feuler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c80ebeadb3f60d871e6e8fc160456dcbe430620a
[INFO] checking terror/euler against try#173780a87744406b7489b28349c0176f14bb3881 for pr-135841
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fterror%2Feuler" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/terror/euler on toolchain 173780a87744406b7489b28349c0176f14bb3881
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/terror/euler
[INFO] finished tweaking git repo https://github.com/terror/euler
[INFO] tweaked toml for git repo https://github.com/terror/euler written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/terror/euler 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" "+173780a87744406b7489b28349c0176f14bb3881" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "936195be4efeffeb733f928d6bfecb740edeb4902d2863de7aa1cd6f310fcc7f", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+173780a87744406b7489b28349c0176f14bb3881" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: methods `select_optional` and `select_many` are never used
[INFO] [stdout]  --> src/select.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) trait Select<'a> {
[INFO] [stdout]   |                  ------ methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 6 |   fn select_optional(&self, selector: &str) -> Result<Option<ElementRef<'a>>>;
[INFO] [stdout]   |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 7 |   fn select_many(&self, selector: &str) -> Result<Vec<ElementRef<'a>>>;
[INFO] [stdout]   |      ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `select_optional` and `select_many` are never used
[INFO] [stdout]  --> src/select.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) trait Select<'a> {
[INFO] [stdout]   |                  ------ methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 6 |   fn select_optional(&self, selector: &str) -> Result<Option<ElementRef<'a>>>;
[INFO] [stdout]   |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 7 |   fn select_many(&self, selector: &str) -> Result<Vec<ElementRef<'a>>>;
[INFO] [stdout]   |      ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
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[INFO] [stdout] 0cb207644de022c76adaf807a0888c8da08cedddfef4bc86a56383ed1be975ad