Dec 03 15:11:06.501 INFO testing coroutine-0.8.0 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 03 15:11:06.501 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-1/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 03 15:11:07.133 INFO [stdout] 2311720039dab78f4304753224bb6b3925c9d66aec0b6dc9256eeaf0d1ea3731
Dec 03 15:11:07.135 INFO running `"docker" "start" "-a" "2311720039dab78f4304753224bb6b3925c9d66aec0b6dc9256eeaf0d1ea3731"`
Dec 03 15:11:08.675 INFO [stderr] usermod: no changes
Dec 03 15:11:08.795 INFO [stderr]    Compiling context v1.0.1
Dec 03 15:11:11.607 INFO [stderr]    Compiling coroutine v0.8.0 (/source)
Dec 03 15:11:12.424 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 03 15:11:12.424 INFO [stderr]   --> src/lib.rs:25:1
Dec 03 15:11:12.424 INFO [stderr]    |
Dec 03 15:11:12.424 INFO [stderr] 25 | #![feature(fnbox)]
Dec 03 15:11:12.424 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 03 15:11:12.424 INFO [stderr] 
Dec 03 15:11:12.424 INFO [stderr] error: aborting due to previous error
Dec 03 15:11:12.424 INFO [stderr] 
Dec 03 15:11:12.424 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 15:11:12.431 INFO [stderr] error: Could not compile `coroutine`.
Dec 03 15:11:12.431 INFO [stderr] 
Dec 03 15:11:12.431 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 15:11:12.433 INFO [stderr] su: No module specific data is present
Dec 03 15:11:13.040 INFO running `"docker" "inspect" "2311720039dab78f4304753224bb6b3925c9d66aec0b6dc9256eeaf0d1ea3731"`
Dec 03 15:11:13.347 INFO running `"docker" "rm" "-f" "2311720039dab78f4304753224bb6b3925c9d66aec0b6dc9256eeaf0d1ea3731"`
Dec 03 15:11:13.566 INFO [stdout] 2311720039dab78f4304753224bb6b3925c9d66aec0b6dc9256eeaf0d1ea3731