Dec 02 09:47:14.461 INFO testing AberrantWolf/bugboy against 1.30.1 for beta-1.31-5
Dec 02 09:47:14.461 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-4/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/beta-1.31-5/1.30.1:/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 +1.30.1 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 09:47:14.986 INFO [stdout] 17811c2f9a8048caec08409958ca4f7288c54c6dfbcd510a40dcdf0ff7880412
Dec 02 09:47:14.995 INFO running `"docker" "start" "-a" "17811c2f9a8048caec08409958ca4f7288c54c6dfbcd510a40dcdf0ff7880412"`
Dec 02 09:47:16.900 INFO [stderr] usermod: no changes
Dec 02 09:47:17.017 INFO [stderr]    Compiling serde_json v1.0.13
Dec 02 09:47:17.023 INFO [stderr]    Compiling num-bigint v0.1.43
Dec 02 09:47:22.567 INFO [stderr]    Compiling num-rational v0.1.42
Dec 02 09:47:25.470 INFO [stderr]    Compiling num v0.1.42
Dec 02 09:47:26.150 INFO [stderr]    Compiling bugboy v0.1.0 (/source)
Dec 02 09:47:27.584 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 09:47:27.584 INFO [stderr]  --> src/bugboy.rs:1:1
Dec 02 09:47:27.584 INFO [stderr]   |
Dec 02 09:47:27.584 INFO [stderr] 1 | #![feature(custom_attribute)]
Dec 02 09:47:27.584 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:47:27.584 INFO [stderr] 
Dec 02 09:47:27.584 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 09:47:27.584 INFO [stderr]  --> src/bugboy.rs:2:1
Dec 02 09:47:27.584 INFO [stderr]   |
Dec 02 09:47:27.584 INFO [stderr] 2 | #![feature(slice_patterns)]
Dec 02 09:47:27.584 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:47:27.584 INFO [stderr] 
Dec 02 09:47:27.595 INFO [stderr] error: aborting due to 2 previous errors
Dec 02 09:47:27.595 INFO [stderr] 
Dec 02 09:47:27.595 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 09:47:27.604 INFO [stderr] error: Could not compile `bugboy`.
Dec 02 09:47:27.606 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 02 09:47:27.647 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 09:47:27.647 INFO [stderr]  --> src/traceboy.rs:1:1
Dec 02 09:47:27.647 INFO [stderr]   |
Dec 02 09:47:27.647 INFO [stderr] 1 | #![feature(custom_attribute)]
Dec 02 09:47:27.647 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:47:27.647 INFO [stderr] 
Dec 02 09:47:27.647 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 09:47:27.647 INFO [stderr]  --> src/traceboy.rs:2:1
Dec 02 09:47:27.647 INFO [stderr]   |
Dec 02 09:47:27.647 INFO [stderr] 2 | #![feature(slice_patterns)]
Dec 02 09:47:27.647 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 09:47:27.647 INFO [stderr] 
Dec 02 09:47:27.651 INFO [stderr] error: aborting due to 2 previous errors
Dec 02 09:47:27.651 INFO [stderr] 
Dec 02 09:47:27.651 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 09:47:27.657 INFO [stderr] error: Could not compile `bugboy`.
Dec 02 09:47:27.657 INFO [stderr] 
Dec 02 09:47:27.657 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 09:47:27.659 INFO [stderr] su: No module specific data is present
Dec 02 09:47:28.354 INFO running `"docker" "inspect" "17811c2f9a8048caec08409958ca4f7288c54c6dfbcd510a40dcdf0ff7880412"`
Dec 02 09:47:28.643 INFO running `"docker" "rm" "-f" "17811c2f9a8048caec08409958ca4f7288c54c6dfbcd510a40dcdf0ff7880412"`
Dec 02 09:47:28.975 INFO [stdout] 17811c2f9a8048caec08409958ca4f7288c54c6dfbcd510a40dcdf0ff7880412