[INFO] cloning repository https://github.com/ddprrt/multi-threading-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ddprrt/multi-threading-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Fmulti-threading-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Fmulti-threading-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 40259cd6edf62321490be529aec4b51ff7943edb
[INFO] testing ddprrt/multi-threading-example against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fddprrt%2Fmulti-threading-example" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ddprrt/multi-threading-example on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ddprrt/multi-threading-example
[INFO] finished tweaking git repo https://github.com/ddprrt/multi-threading-example
[INFO] tweaked toml for git repo https://github.com/ddprrt/multi-threading-example written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ddprrt/multi-threading-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe1cd500c288f368a6e8b35d2c3bb76e1d4c86f3a7cebc3519c550dfbaafc481
[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" "fe1cd500c288f368a6e8b35d2c3bb76e1d4c86f3a7cebc3519c550dfbaafc481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe1cd500c288f368a6e8b35d2c3bb76e1d4c86f3a7cebc3519c550dfbaafc481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe1cd500c288f368a6e8b35d2c3bb76e1d4c86f3a7cebc3519c550dfbaafc481", kill_on_drop: false }`
[INFO] [stdout] fe1cd500c288f368a6e8b35d2c3bb76e1d4c86f3a7cebc3519c550dfbaafc481
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4a7d9ad25fff095961b3b60141f6c8ee88f5fb83a342b789b94ab089d05b4fd
[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" "f4a7d9ad25fff095961b3b60141f6c8ee88f5fb83a342b789b94ab089d05b4fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling multi-threading v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |             let res = match mutex.lock() {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/main.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let z = Rc::new(2);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.28s
[INFO] running `Command { std: "docker" "inspect" "f4a7d9ad25fff095961b3b60141f6c8ee88f5fb83a342b789b94ab089d05b4fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4a7d9ad25fff095961b3b60141f6c8ee88f5fb83a342b789b94ab089d05b4fd", kill_on_drop: false }`
[INFO] [stdout] f4a7d9ad25fff095961b3b60141f6c8ee88f5fb83a342b789b94ab089d05b4fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] da8aa089c13b141d9d2c89236d64644fbd1eb8b93e3d7cde294df8289221e893
[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" "da8aa089c13b141d9d2c89236d64644fbd1eb8b93e3d7cde294df8289221e893", kill_on_drop: false }`
[INFO] [stderr]    Compiling multi-threading v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]   --> src/main.rs:42:17
[INFO] [stdout]    |
[INFO] [stdout] 42 |             let res = match mutex.lock() {
[INFO] [stdout]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/main.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let z = Rc::new(2);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "da8aa089c13b141d9d2c89236d64644fbd1eb8b93e3d7cde294df8289221e893", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da8aa089c13b141d9d2c89236d64644fbd1eb8b93e3d7cde294df8289221e893", kill_on_drop: false }`
[INFO] [stdout] da8aa089c13b141d9d2c89236d64644fbd1eb8b93e3d7cde294df8289221e893
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b8e596d2fd60b0bf78da45fe3534bc9925577161d233eddf3ef7b3ffb4ec87de
[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" "b8e596d2fd60b0bf78da45fe3534bc9925577161d233eddf3ef7b3ffb4ec87de", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]   --> src/main.rs:42:17
[INFO] [stderr]    |
[INFO] [stderr] 42 |             let res = match mutex.lock() {
[INFO] [stderr]    |                 ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/main.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let z = Rc::new(2);
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr] warning: `multi-threading` (bin "multi-threading" test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/multi_threading-1007544631f44e34)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b8e596d2fd60b0bf78da45fe3534bc9925577161d233eddf3ef7b3ffb4ec87de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8e596d2fd60b0bf78da45fe3534bc9925577161d233eddf3ef7b3ffb4ec87de", kill_on_drop: false }`
[INFO] [stdout] b8e596d2fd60b0bf78da45fe3534bc9925577161d233eddf3ef7b3ffb4ec87de