Dec 02 22:26:59.170 INFO testing plex-0.2.3 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 22:26:59.170 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/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 02 22:26:59.592 INFO [stdout] 20c26b438e96f4c40264ddbed99c7a035d2f22350b6d5f9904e32e18e0811b60
Dec 02 22:26:59.594 INFO running `"docker" "start" "-a" "20c26b438e96f4c40264ddbed99c7a035d2f22350b6d5f9904e32e18e0811b60"`
Dec 02 22:27:00.963 INFO [stderr] usermod: no changes
Dec 02 22:27:01.095 INFO [stderr]    Compiling syn v0.14.9
Dec 02 22:27:18.691 INFO [stderr]    Compiling plex v0.2.3 (/source)
Dec 02 22:27:22.403 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 22:27:22.403 INFO [stderr]  --> src/lib.rs:2:1
Dec 02 22:27:22.403 INFO [stderr]   |
Dec 02 22:27:22.403 INFO [stderr] 2 | #![feature(proc_macro_diagnostic)]
Dec 02 22:27:22.403 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:27:22.403 INFO [stderr] 
Dec 02 22:27:22.403 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 22:27:22.403 INFO [stderr]  --> src/lib.rs:3:1
Dec 02 22:27:22.403 INFO [stderr]   |
Dec 02 22:27:22.403 INFO [stderr] 3 | #![feature(proc_macro_span)]
Dec 02 22:27:22.403 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:27:22.403 INFO [stderr] 
Dec 02 22:27:22.408 INFO [stderr] error: aborting due to 2 previous errors
Dec 02 22:27:22.408 INFO [stderr] 
Dec 02 22:27:22.408 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 22:27:22.420 INFO [stderr] error: Could not compile `plex`.
Dec 02 22:27:22.420 INFO [stderr] 
Dec 02 22:27:22.420 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 22:27:22.421 INFO [stderr] su: No module specific data is present
Dec 02 22:27:22.789 INFO running `"docker" "inspect" "20c26b438e96f4c40264ddbed99c7a035d2f22350b6d5f9904e32e18e0811b60"`
Dec 02 22:27:22.924 INFO running `"docker" "rm" "-f" "20c26b438e96f4c40264ddbed99c7a035d2f22350b6d5f9904e32e18e0811b60"`
Dec 02 22:27:23.026 INFO [stdout] 20c26b438e96f4c40264ddbed99c7a035d2f22350b6d5f9904e32e18e0811b60