[INFO] cloning repository https://github.com/jeffusan/rust_fun
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeffusan/rust_fun" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffusan%2Frust_fun", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffusan%2Frust_fun'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0db63d2afabccf1934eb3df46b5dc33064891761
[INFO] testing jeffusan/rust_fun against try#eafdee2dfae8c2233b74f98b123308be7ccefcc6 for pr-79296
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffusan%2Frust_fun" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeffusan/rust_fun on toolchain eafdee2dfae8c2233b74f98b123308be7ccefcc6
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jeffusan/rust_fun
[INFO] finished tweaking git repo https://github.com/jeffusan/rust_fun
[INFO] tweaked toml for git repo https://github.com/jeffusan/rust_fun written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/jeffusan/rust_fun already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bef93954472a748cc1f1e4e38afa7cd1f46892a4a6e423db303d7303358a9fb3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bef93954472a748cc1f1e4e38afa7cd1f46892a4a6e423db303d7303358a9fb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bef93954472a748cc1f1e4e38afa7cd1f46892a4a6e423db303d7303358a9fb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bef93954472a748cc1f1e4e38afa7cd1f46892a4a6e423db303d7303358a9fb3", kill_on_drop: false }`
[INFO] [stdout] bef93954472a748cc1f1e4e38afa7cd1f46892a4a6e423db303d7303358a9fb3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3be50d263f9366b87d61117a57c068cb5615be5e8243faa8ea95d00686df3c3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c3be50d263f9366b87d61117a57c068cb5615be5e8243faa8ea95d00686df3c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello-world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Stack`
[INFO] [stdout]  --> src/main.rs:7:16
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub struct Stack {
[INFO] [stdout]   |                ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/main.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 |         pub fn new() -> Stack {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `push`
[INFO] [stdout]   --> src/main.rs:23:16
[INFO] [stdout]    |
[INFO] [stdout] 23 |         pub fn push(&mut self, item: i8) {
[INFO] [stdout]    |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop`
[INFO] [stdout]   --> src/main.rs:35:16
[INFO] [stdout]    |
[INFO] [stdout] 35 |         pub fn pop(&mut self) -> Option<i8> {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `max`
[INFO] [stdout]   --> src/main.rs:42:16
[INFO] [stdout]    |
[INFO] [stdout] 42 |         pub fn max(&self) -> i8 {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "c3be50d263f9366b87d61117a57c068cb5615be5e8243faa8ea95d00686df3c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3be50d263f9366b87d61117a57c068cb5615be5e8243faa8ea95d00686df3c3", kill_on_drop: false }`
[INFO] [stdout] c3be50d263f9366b87d61117a57c068cb5615be5e8243faa8ea95d00686df3c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c500581b10646c62f13e8a4bcdd4333350beffe9173606c5b6f55b2a1a0cde32
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c500581b10646c62f13e8a4bcdd4333350beffe9173606c5b6f55b2a1a0cde32", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello-world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "c500581b10646c62f13e8a4bcdd4333350beffe9173606c5b6f55b2a1a0cde32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c500581b10646c62f13e8a4bcdd4333350beffe9173606c5b6f55b2a1a0cde32", kill_on_drop: false }`
[INFO] [stdout] c500581b10646c62f13e8a4bcdd4333350beffe9173606c5b6f55b2a1a0cde32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+eafdee2dfae8c2233b74f98b123308be7ccefcc6" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f21ee1ebf338d8e1b557ac0610d95ae990995805927209d79b491a79348c61c7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f21ee1ebf338d8e1b557ac0610d95ae990995805927209d79b491a79348c61c7", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/hello_world-bcd8e84dcb066d35
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test stack::push_test ... ok
[INFO] [stdout] test stack::max_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f21ee1ebf338d8e1b557ac0610d95ae990995805927209d79b491a79348c61c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f21ee1ebf338d8e1b557ac0610d95ae990995805927209d79b491a79348c61c7", kill_on_drop: false }`
[INFO] [stdout] f21ee1ebf338d8e1b557ac0610d95ae990995805927209d79b491a79348c61c7