[INFO] cloning repository https://github.com/DeusFerrariis/rust-patterns
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DeusFerrariis/rust-patterns" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDeusFerrariis%2Frust-patterns", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDeusFerrariis%2Frust-patterns'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d8b0239631461ae61a79e92d5b0233fb7dbfab2
[INFO] testing DeusFerrariis/rust-patterns against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDeusFerrariis%2Frust-patterns" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DeusFerrariis/rust-patterns on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/DeusFerrariis/rust-patterns
[INFO] finished tweaking git repo https://github.com/DeusFerrariis/rust-patterns
[INFO] tweaked toml for git repo https://github.com/DeusFerrariis/rust-patterns written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/DeusFerrariis/rust-patterns already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4026deee1f3d20051a86ac53b19c580d271307edcd071a2ed6e76c19f01ffe74
[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" "4026deee1f3d20051a86ac53b19c580d271307edcd071a2ed6e76c19f01ffe74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4026deee1f3d20051a86ac53b19c580d271307edcd071a2ed6e76c19f01ffe74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4026deee1f3d20051a86ac53b19c580d271307edcd071a2ed6e76c19f01ffe74", kill_on_drop: false }`
[INFO] [stdout] 4026deee1f3d20051a86ac53b19c580d271307edcd071a2ed6e76c19f01ffe74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 028bdb9cad39074a788ed9afab692af30565cb95d2fbf6536aec3aa6f179dcfc
[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" "028bdb9cad39074a788ed9afab692af30565cb95d2fbf6536aec3aa6f179dcfc", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-patterns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `V4`
[INFO] [stdout]  --> src/singleton.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     V4,
[INFO] [stdout]   |     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]  --> src/singleton.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     V6,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Singleton`
[INFO] [stdout]   --> src/singleton.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Singleton {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `take_instance`
[INFO] [stdout]   --> src/singleton.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 |     fn take_instance(&mut self) -> IpAddr {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `SINGLETON`
[INFO] [stdout]   --> src/singleton.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | / static mut SINGLETON: Singleton = Singleton {
[INFO] [stdout] 22 | |     field: Some(IpAddr::V4),
[INFO] [stdout] 23 | | };
[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 0.68s
[INFO] running `Command { std: "docker" "inspect" "028bdb9cad39074a788ed9afab692af30565cb95d2fbf6536aec3aa6f179dcfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "028bdb9cad39074a788ed9afab692af30565cb95d2fbf6536aec3aa6f179dcfc", kill_on_drop: false }`
[INFO] [stdout] 028bdb9cad39074a788ed9afab692af30565cb95d2fbf6536aec3aa6f179dcfc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 824d478a3d2ced885b365a5a4a931235a8e2c6a9e575ea9d7d65166c819e9a91
[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" "824d478a3d2ced885b365a5a4a931235a8e2c6a9e575ea9d7d65166c819e9a91", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-patterns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `singleton_num2`
[INFO] [stdout]   --> src/singleton.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let singleton_num2 = unsafe { SINGLETON.take_instance() };
[INFO] [stdout]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_singleton_num2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V6`
[INFO] [stdout]  --> src/singleton.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     V6,
[INFO] [stdout]   |     ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.71s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "824d478a3d2ced885b365a5a4a931235a8e2c6a9e575ea9d7d65166c819e9a91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "824d478a3d2ced885b365a5a4a931235a8e2c6a9e575ea9d7d65166c819e9a91", kill_on_drop: false }`
[INFO] [stdout] 824d478a3d2ced885b365a5a4a931235a8e2c6a9e575ea9d7d65166c819e9a91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1f2ff99f4894e59d0dd5f21e8dbf5eb87de4496cff106732590d619e8ea468a0
[INFO] running `Command { std: "docker" "start" "-a" "1f2ff99f4894e59d0dd5f21e8dbf5eb87de4496cff106732590d619e8ea468a0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused variable: `singleton_num2`
[INFO] [stderr]   --> src/singleton.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 40 |         let singleton_num2 = unsafe { SINGLETON.take_instance() };
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_singleton_num2`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V6`
[INFO] [stderr]  --> src/singleton.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     V6,
[INFO] [stderr]   |     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.28s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_patterns-40dd5fcef7c6c98d)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test singleton::tests::example ... ok
[INFO] [stdout] test singleton::tests::request_taken_singleton - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1f2ff99f4894e59d0dd5f21e8dbf5eb87de4496cff106732590d619e8ea468a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f2ff99f4894e59d0dd5f21e8dbf5eb87de4496cff106732590d619e8ea468a0", kill_on_drop: false }`
[INFO] [stdout] 1f2ff99f4894e59d0dd5f21e8dbf5eb87de4496cff106732590d619e8ea468a0