[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] checking tingfeng-key/rust_cpal_learn against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftingfeng-key%2Frust_cpal_learn" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tingfeng-key/rust_cpal_learn on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "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-4-tc1/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96f503024c81f4ae03a6089226b58e8bfc39a09249acf43d7fa243c7f6ebf656
[INFO] running `Command { std: "docker" "start" "-a" "96f503024c81f4ae03a6089226b58e8bfc39a09249acf43d7fa243c7f6ebf656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96f503024c81f4ae03a6089226b58e8bfc39a09249acf43d7fa243c7f6ebf656", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96f503024c81f4ae03a6089226b58e8bfc39a09249acf43d7fa243c7f6ebf656", kill_on_drop: false }`
[INFO] [stdout] 96f503024c81f4ae03a6089226b58e8bfc39a09249acf43d7fa243c7f6ebf656
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf181079bbc2d8efd01cc4a74d36d704161f6f3408ec0a748129a6f8f5d75ef7
[INFO] running `Command { std: "docker" "start" "-a" "bf181079bbc2d8efd01cc4a74d36d704161f6f3408ec0a748129a6f8f5d75ef7", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[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]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling cpal v0.10.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[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]     Checking slice-deque v0.2.4
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking minimp3 v0.3.3
[INFO] [stderr]     Checking backtrace v0.3.37
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking 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: 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.89s
[INFO] running `Command { std: "docker" "inspect" "bf181079bbc2d8efd01cc4a74d36d704161f6f3408ec0a748129a6f8f5d75ef7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf181079bbc2d8efd01cc4a74d36d704161f6f3408ec0a748129a6f8f5d75ef7", kill_on_drop: false }`
[INFO] [stdout] bf181079bbc2d8efd01cc4a74d36d704161f6f3408ec0a748129a6f8f5d75ef7
[INFO] checking tingfeng-key/rust_cpal_learn against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftingfeng-key%2Frust_cpal_learn" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tingfeng-key/rust_cpal_learn on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "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-4-tc2/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: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d21e3b162f1dda234c574e8e57cc840f9d762975c10b2f2cc9d924793bfbd95b
[INFO] running `Command { std: "docker" "start" "-a" "d21e3b162f1dda234c574e8e57cc840f9d762975c10b2f2cc9d924793bfbd95b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d21e3b162f1dda234c574e8e57cc840f9d762975c10b2f2cc9d924793bfbd95b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d21e3b162f1dda234c574e8e57cc840f9d762975c10b2f2cc9d924793bfbd95b", kill_on_drop: false }`
[INFO] [stdout] d21e3b162f1dda234c574e8e57cc840f9d762975c10b2f2cc9d924793bfbd95b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 092a2cac5d187ef53188d7dd3b12f1269caf3d51ec25f22edfd07a4a58e4f680
[INFO] running `Command { std: "docker" "start" "-a" "092a2cac5d187ef53188d7dd3b12f1269caf3d51ec25f22edfd07a4a58e4f680", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.45
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[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]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling cpal v0.10.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking lazy_static v1.4.0
[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]     Checking slice-deque v0.2.4
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking minimp3 v0.3.3
[INFO] [stderr]     Checking backtrace v0.3.37
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking 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: 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] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/main.rs:136:23
[INFO] [stdout]     |
[INFO] [stdout] 136 |         thread::spawn(move || {
[INFO] [stdout]     |                       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `spawn`
[INFO] [stdout]    --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:672:1
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]     |
[INFO] [stdout] 136 |         thread::spawn(move || -> /* Type */ {
[INFO] [stdout]     |                               +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/main.rs:136:23
[INFO] [stdout]     |
[INFO] [stdout] 136 |         thread::spawn(move || {
[INFO] [stdout]     |                       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `_: Send`
[INFO] [stdout] note: required by a bound in `spawn`
[INFO] [stdout]    --> /rustc/3a4bc97f6385a3aa300a4fd689b44350e54fd676/library/std/src/thread/mod.rs:672:1
[INFO] [stdout] help: try giving this closure an explicit return type
[INFO] [stdout]     |
[INFO] [stdout] 136 |         thread::spawn(move || -> /* Type */ {
[INFO] [stdout]     |                               +++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cpal` (bin "cpal") due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `cpal` (bin "cpal" test) due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "092a2cac5d187ef53188d7dd3b12f1269caf3d51ec25f22edfd07a4a58e4f680", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "092a2cac5d187ef53188d7dd3b12f1269caf3d51ec25f22edfd07a4a58e4f680", kill_on_drop: false }`
[INFO] [stdout] 092a2cac5d187ef53188d7dd3b12f1269caf3d51ec25f22edfd07a4a58e4f680