[INFO] cloning repository https://github.com/tingfeng-key/rust_cpal_learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tingfeng-key/rust_cpal_learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftingfeng-key%2Frust_cpal_learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftingfeng-key%2Frust_cpal_learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ec410f4d6e9b8ff7410d9f6f531cc058192aebf7
[INFO] testing tingfeng-key/rust_cpal_learn against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftingfeng-key%2Frust_cpal_learn" "/workspace/builds/worker-55/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-55/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tingfeng-key/rust_cpal_learn on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tingfeng-key/rust_cpal_learn
[INFO] finished tweaking git repo https://github.com/tingfeng-key/rust_cpal_learn
[INFO] tweaked toml for git repo https://github.com/tingfeng-key/rust_cpal_learn written to /workspace/builds/worker-55/source/Cargo.toml
[INFO] crate git repo https://github.com/tingfeng-key/rust_cpal_learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 35aa77ff959c53bb7a6a89a2402e29e700ae85a9ebf0f8df8e93ad811e761f37
[INFO] running `Command { std: "docker" "start" "-a" "35aa77ff959c53bb7a6a89a2402e29e700ae85a9ebf0f8df8e93ad811e761f37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35aa77ff959c53bb7a6a89a2402e29e700ae85a9ebf0f8df8e93ad811e761f37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35aa77ff959c53bb7a6a89a2402e29e700ae85a9ebf0f8df8e93ad811e761f37", kill_on_drop: false }`
[INFO] [stdout] 35aa77ff959c53bb7a6a89a2402e29e700ae85a9ebf0f8df8e93ad811e761f37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bfe6848bbb95ea4e91d5150c036c08d1546c868bbdcb58cfd81839c82447b25
[INFO] running `Command { std: "docker" "start" "-a" "2bfe6848bbb95ea4e91d5150c036c08d1546c868bbdcb58cfd81839c82447b25", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling cpal v0.10.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling minimp3-sys v0.3.1
[INFO] [stderr]    Compiling slice-deque v0.2.4
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling minimp3 v0.3.3
[INFO] [stderr]    Compiling backtrace v0.3.37
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling cpal v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `thread` is imported redundantly
[INFO] [stdout]    --> src/main.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 2   | use std::thread;
[INFO] [stdout]     |     ----------- the item `thread` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 118 |         use std::thread;
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 11s
[INFO] running `Command { std: "docker" "inspect" "2bfe6848bbb95ea4e91d5150c036c08d1546c868bbdcb58cfd81839c82447b25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bfe6848bbb95ea4e91d5150c036c08d1546c868bbdcb58cfd81839c82447b25", kill_on_drop: false }`
[INFO] [stdout] 2bfe6848bbb95ea4e91d5150c036c08d1546c868bbdcb58cfd81839c82447b25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 100c54d973c5f97c8d47d5f742cca1e9f9a35c13dc5f6e94cda3827f6a9f2507
[INFO] running `Command { std: "docker" "start" "-a" "100c54d973c5f97c8d47d5f742cca1e9f9a35c13dc5f6e94cda3827f6a9f2507", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cpal v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `thread` is imported redundantly
[INFO] [stdout]    --> src/main.rs:118:13
[INFO] [stdout]     |
[INFO] [stdout] 2   | use std::thread;
[INFO] [stdout]     |     ----------- the item `thread` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 118 |         use std::thread;
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `Command { std: "docker" "inspect" "100c54d973c5f97c8d47d5f742cca1e9f9a35c13dc5f6e94cda3827f6a9f2507", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "100c54d973c5f97c8d47d5f742cca1e9f9a35c13dc5f6e94cda3827f6a9f2507", kill_on_drop: false }`
[INFO] [stdout] 100c54d973c5f97c8d47d5f742cca1e9f9a35c13dc5f6e94cda3827f6a9f2507
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-55/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5db03943a800e37ac0e186c414922eb80b66cd8b840dfd1fd328e683616844a1
[INFO] running `Command { std: "docker" "start" "-a" "5db03943a800e37ac0e186c414922eb80b66cd8b840dfd1fd328e683616844a1", kill_on_drop: false }`
[INFO] [stderr] warning: the item `thread` is imported redundantly
[INFO] [stderr]    --> src/main.rs:118:13
[INFO] [stderr]     |
[INFO] [stderr] 2   | use std::thread;
[INFO] [stderr]     |     ----------- the item `thread` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 118 |         use std::thread;
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `cpal` (bin "cpal" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cpal-54690f2ed5a82d9b)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5db03943a800e37ac0e186c414922eb80b66cd8b840dfd1fd328e683616844a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5db03943a800e37ac0e186c414922eb80b66cd8b840dfd1fd328e683616844a1", kill_on_drop: false }`
[INFO] [stdout] 5db03943a800e37ac0e186c414922eb80b66cd8b840dfd1fd328e683616844a1