[INFO] updating cached repository https://github.com/sebasmagri/rust-concurrency-patterns
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c916fe831faec73a7fb5d652e91fa9da528d85c4
[INFO] testing sebasmagri/rust-concurrency-patterns against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsebasmagri%2Frust-concurrency-patterns" "work/builds/worker-5/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sebasmagri/rust-concurrency-patterns on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/sebasmagri/rust-concurrency-patterns
[INFO] finished tweaking git repo https://github.com/sebasmagri/rust-concurrency-patterns
[INFO] tweaked toml for git repo https://github.com/sebasmagri/rust-concurrency-patterns written to work/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/sebasmagri/rust-concurrency-patterns already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] fd2009b7dca6637f7001b3a6fd8a3b33a2ed1bd4742e88bf64d37a1ba35ca495
[INFO] running `"docker" "start" "-a" "fd2009b7dca6637f7001b3a6fd8a3b33a2ed1bd4742e88bf64d37a1ba35ca495"`
[INFO] [stderr]    Compiling concurrency-patterns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `"docker" "inspect" "fd2009b7dca6637f7001b3a6fd8a3b33a2ed1bd4742e88bf64d37a1ba35ca495"`
[INFO] running `"docker" "rm" "-f" "fd2009b7dca6637f7001b3a6fd8a3b33a2ed1bd4742e88bf64d37a1ba35ca495"`
[INFO] [stdout] fd2009b7dca6637f7001b3a6fd8a3b33a2ed1bd4742e88bf64d37a1ba35ca495
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3f604d2eee562c7d33bf5da775ec82724a969a5c69109099ad1721ff4ff1cd8c
[INFO] running `"docker" "start" "-a" "3f604d2eee562c7d33bf5da775ec82724a969a5c69109099ad1721ff4ff1cd8c"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling concurrency-patterns v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/04-fan-in.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     consumer(Arc::new(Mutex::new(rx))).join();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.94s
[INFO] running `"docker" "inspect" "3f604d2eee562c7d33bf5da775ec82724a969a5c69109099ad1721ff4ff1cd8c"`
[INFO] running `"docker" "rm" "-f" "3f604d2eee562c7d33bf5da775ec82724a969a5c69109099ad1721ff4ff1cd8c"`
[INFO] [stdout] 3f604d2eee562c7d33bf5da775ec82724a969a5c69109099ad1721ff4ff1cd8c
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] dc1dbadcc746224d7048e9af744e29190a8d1b93e1c678cb55aa105ad031b2e4
[INFO] running `"docker" "start" "-a" "dc1dbadcc746224d7048e9af744e29190a8d1b93e1c678cb55aa105ad031b2e4"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/concurrency_patterns-0102cfef65dded97
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "dc1dbadcc746224d7048e9af744e29190a8d1b93e1c678cb55aa105ad031b2e4"`
[INFO] running `"docker" "rm" "-f" "dc1dbadcc746224d7048e9af744e29190a8d1b93e1c678cb55aa105ad031b2e4"`
[INFO] [stdout] dc1dbadcc746224d7048e9af744e29190a8d1b93e1c678cb55aa105ad031b2e4