[INFO] updating cached repository Reignbeaux/rust-mutex-test
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Reignbeaux/rust-mutex-test
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Reignbeaux/rust-mutex-test" "work/ex/beta-1.38-1/sources/1.37.0/gh/Reignbeaux/rust-mutex-test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Reignbeaux/rust-mutex-test'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Reignbeaux/rust-mutex-test" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Reignbeaux/rust-mutex-test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Reignbeaux/rust-mutex-test'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0c1863002006e26b060fb00b3e7495c36b35fc04
[INFO] sha for GitHub repo Reignbeaux/rust-mutex-test: 0c1863002006e26b060fb00b3e7495c36b35fc04
[INFO] validating manifest of Reignbeaux/rust-mutex-test on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Reignbeaux/rust-mutex-test on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Reignbeaux/rust-mutex-test
[INFO] finished frobbing Reignbeaux/rust-mutex-test
[INFO] frobbed toml for Reignbeaux/rust-mutex-test written to work/ex/beta-1.38-1/sources/1.37.0/gh/Reignbeaux/rust-mutex-test/Cargo.toml
[INFO] started frobbing Reignbeaux/rust-mutex-test
[INFO] finished frobbing Reignbeaux/rust-mutex-test
[INFO] frobbed toml for Reignbeaux/rust-mutex-test written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Reignbeaux/rust-mutex-test/Cargo.toml
[INFO] crate Reignbeaux/rust-mutex-test already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Reignbeaux/rust-mutex-test against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Reignbeaux/rust-mutex-test:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 8f7be935135e5d8b7bf33b976b307c6375b4efa45163b6cb2cefb89cf745f830
[INFO] running `"docker" "start" "-a" "8f7be935135e5d8b7bf33b976b307c6375b4efa45163b6cb2cefb89cf745f830"`
[INFO] [stderr]    Compiling mutex_test v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::iter::FromIterator`
[INFO] [stderr]  --> src/main.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::iter::FromIterator;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `scoped` found for type `std::thread::Thread` in the current scope
[INFO] [stderr]   --> src/main.rs:16:25
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let guard = Thread::scoped(move || {
[INFO] [stderr]    |                         ^^^^^^ function or associated item not found in `std::thread::Thread`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `mutex_test`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8f7be935135e5d8b7bf33b976b307c6375b4efa45163b6cb2cefb89cf745f830"`
[INFO] running `"docker" "rm" "-f" "8f7be935135e5d8b7bf33b976b307c6375b4efa45163b6cb2cefb89cf745f830"`
[INFO] [stdout] 8f7be935135e5d8b7bf33b976b307c6375b4efa45163b6cb2cefb89cf745f830