[INFO] cloning repository https://github.com/elcid14/rust_task_queue
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/elcid14/rust_task_queue" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felcid14%2Frust_task_queue", kill_on_drop: false }`
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[INFO] building elcid14/rust_task_queue against try#8b8eff55bd72abbb57167bc42222a7f91d41cb0d for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Felcid14%2Frust_task_queue" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
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[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/elcid14/rust_task_queue on toolchain 8b8eff55bd72abbb57167bc42222a7f91d41cb0d
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[INFO] crate git repo https://github.com/elcid14/rust_task_queue already has a lockfile, it will not be regenerated
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[INFO] [stdout] warning: type alias `TaskFn` is never used
[INFO] [stdout]  --> src/task_registry.rs:9:10
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub type TaskFn = Box<dyn Fn() + Send + Sync + 'static>;
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `TASKS` is never used
[INFO] [stdout]   --> src/task_registry.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | static TASKS: Lazy<Mutex<HashMap<String, TaskFn>>> = Lazy::new(|| Mutex::new(HashMap::new()));
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `debug_print_handlers` is never used
[INFO] [stdout]   --> src/task_registry.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn debug_print_handlers() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_task` is never used
[INFO] [stdout]   --> src/task_registry.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn run_task(name: &str) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `fail` is never used
[INFO] [stdout]   --> src/task/mod.rs:58:11
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Task {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |    pub fn fail(&mut self) {
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 28s
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[INFO] running `Command { std: "docker" "rm" "-f" "53535e189ba7e5cd7a6b488c3c5c542f8bf6c01b565f4a25abb4318f307c8c7e", kill_on_drop: false }`
[INFO] [stdout] 53535e189ba7e5cd7a6b488c3c5c542f8bf6c01b565f4a25abb4318f307c8c7e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+8b8eff55bd72abbb57167bc42222a7f91d41cb0d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5315c530a3fbe84b27624b0fcc1e6139c20a68a9a2f4853cac06a5a2be2afd48
[INFO] running `Command { std: "docker" "start" "-a" "5315c530a3fbe84b27624b0fcc1e6139c20a68a9a2f4853cac06a5a2be2afd48", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias `TaskFn` is never used
[INFO] [stdout]  --> src/task_registry.rs:9:10
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub type TaskFn = Box<dyn Fn() + Send + Sync + 'static>;
[INFO] [stdout]   |          ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `TASKS` is never used
[INFO] [stdout]   --> src/task_registry.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | static TASKS: Lazy<Mutex<HashMap<String, TaskFn>>> = Lazy::new(|| Mutex::new(HashMap::new()));
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `debug_print_handlers` is never used
[INFO] [stdout]   --> src/task_registry.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub fn debug_print_handlers() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_task` is never used
[INFO] [stdout]   --> src/task_registry.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub fn run_task(name: &str) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `fail` is never used
[INFO] [stdout]   --> src/task/mod.rs:58:11
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl Task {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |    pub fn fail(&mut self) {
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.29s
[INFO] running `Command { std: "docker" "inspect" "5315c530a3fbe84b27624b0fcc1e6139c20a68a9a2f4853cac06a5a2be2afd48", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5315c530a3fbe84b27624b0fcc1e6139c20a68a9a2f4853cac06a5a2be2afd48", kill_on_drop: false }`
[INFO] [stdout] 5315c530a3fbe84b27624b0fcc1e6139c20a68a9a2f4853cac06a5a2be2afd48