[INFO] cloning repository https://github.com/tynr426/concurrent_prog
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tynr426/concurrent_prog" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftynr426%2Fconcurrent_prog", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftynr426%2Fconcurrent_prog'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b6ebb7610abe74273975100bb8192b92d59660e1
[INFO] checking tynr426/concurrent_prog against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftynr426%2Fconcurrent_prog" "/workspace/builds/worker-71/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-71/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tynr426/concurrent_prog on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tynr426/concurrent_prog
[INFO] finished tweaking git repo https://github.com/tynr426/concurrent_prog
[INFO] tweaked toml for git repo https://github.com/tynr426/concurrent_prog written to /workspace/builds/worker-71/source/Cargo.toml
[INFO] crate git repo https://github.com/tynr426/concurrent_prog already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b14666fc7cf01db83f07fd5459b15f49422ec7ab6c819603c89de5e584b4209
[INFO] running `Command { std: "docker" "start" "-a" "8b14666fc7cf01db83f07fd5459b15f49422ec7ab6c819603c89de5e584b4209", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b14666fc7cf01db83f07fd5459b15f49422ec7ab6c819603c89de5e584b4209", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b14666fc7cf01db83f07fd5459b15f49422ec7ab6c819603c89de5e584b4209", kill_on_drop: false }`
[INFO] [stdout] 8b14666fc7cf01db83f07fd5459b15f49422ec7ab6c819603c89de5e584b4209
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-71/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7bae52e1a0f12daba542e1012c54580558dfbf9a5912c26c886255e410e7cd96
[INFO] running `Command { std: "docker" "start" "-a" "7bae52e1a0f12daba542e1012c54580558dfbf9a5912c26c886255e410e7cd96", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking concurrent_prog v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0603]: function `mutex_test` is private
[INFO] [stdout]  --> src/main.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | use mutex_learn::mutex_test;
[INFO] [stdout]   |                  ^^^^^^^^^^ private function
[INFO] [stdout]   |
[INFO] [stdout] note: the function `mutex_test` is defined here
[INFO] [stdout]  --> src/mutex_learn.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn mutex_test() {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/mutex_learn.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: function `mutex_test` is private
[INFO] [stdout]  --> src/main.rs:5:18
[INFO] [stdout]   |
[INFO] [stdout] 5 | use mutex_learn::mutex_test;
[INFO] [stdout]   |                  ^^^^^^^^^^ private function
[INFO] [stdout]   |
[INFO] [stdout] note: the function `mutex_test` is defined here
[INFO] [stdout]  --> src/mutex_learn.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn mutex_test() {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/mutex_learn.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `concurrent_prog` due to 2 previous errors; 1 warning emitted
[INFO] [stdout] For more information about this error, try `rustc --explain E0603`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0603`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7bae52e1a0f12daba542e1012c54580558dfbf9a5912c26c886255e410e7cd96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bae52e1a0f12daba542e1012c54580558dfbf9a5912c26c886255e410e7cd96", kill_on_drop: false }`
[INFO] [stdout] 7bae52e1a0f12daba542e1012c54580558dfbf9a5912c26c886255e410e7cd96