[INFO] cloning repository https://github.com/nelsonatgithub/buglife
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nelsonatgithub/buglife" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelsonatgithub%2Fbuglife", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelsonatgithub%2Fbuglife'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c4e3036fb770095f019aafa2a91f82c045aeda49
[INFO] checking nelsonatgithub/buglife against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnelsonatgithub%2Fbuglife" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nelsonatgithub/buglife on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nelsonatgithub/buglife
[INFO] finished tweaking git repo https://github.com/nelsonatgithub/buglife
[INFO] tweaked toml for git repo https://github.com/nelsonatgithub/buglife written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/nelsonatgithub/buglife 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87c2370b700fe262eb8881a956cd71e5b12cec333976096d2a3c45eeabbba067
[INFO] running `Command { std: "docker" "start" "-a" "87c2370b700fe262eb8881a956cd71e5b12cec333976096d2a3c45eeabbba067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87c2370b700fe262eb8881a956cd71e5b12cec333976096d2a3c45eeabbba067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87c2370b700fe262eb8881a956cd71e5b12cec333976096d2a3c45eeabbba067", kill_on_drop: false }`
[INFO] [stdout] 87c2370b700fe262eb8881a956cd71e5b12cec333976096d2a3c45eeabbba067
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63ad2f4aa628aca14d6038e850bfdc715bef774ddaa3174ec6e27a00f2d28ebe
[INFO] running `Command { std: "docker" "start" "-a" "63ad2f4aa628aca14d6038e850bfdc715bef774ddaa3174ec6e27a00f2d28ebe", kill_on_drop: false }`
[INFO] [stderr]     Checking BUGLIFE v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `clear_relations`, `get_tag`, and `has_relation` are never used
[INFO] [stdout]   --> src/main.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Bug {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn clear_relations(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     fn get_tag(&mut self) -> String {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     fn has_relation(&mut self, bug: &Rc<RefCell<Bug>>) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bug_3`
[INFO] [stdout]    --> src/main.rs:236:9
[INFO] [stdout]     |
[INFO] [stdout] 236 |     let bug_3 = Rc::new(RefCell::new(Bug::new(3)));
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_bug_3`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_relations_size`
[INFO] [stdout]    --> src/main.rs:238:9
[INFO] [stdout]     |
[INFO] [stdout] 238 |     let a_relations_size = bug_0.borrow_mut().add_relation(&bug_1);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_relations_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `clear_relations` and `get_tag` are never used
[INFO] [stdout]   --> src/main.rs:50:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Bug {
[INFO] [stdout]    | -------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn clear_relations(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     fn get_tag(&mut self) -> String {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "63ad2f4aa628aca14d6038e850bfdc715bef774ddaa3174ec6e27a00f2d28ebe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63ad2f4aa628aca14d6038e850bfdc715bef774ddaa3174ec6e27a00f2d28ebe", kill_on_drop: false }`
[INFO] [stdout] 63ad2f4aa628aca14d6038e850bfdc715bef774ddaa3174ec6e27a00f2d28ebe