Dec 02 12:19:33.367 INFO testing urbit-0.1.0 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 12:19:33.367 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-0/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 12:19:33.605 INFO [stdout] e3a90c9f3103236921e58f713766c2f48cf6233f5b1da59eca7e707abb768baa
Dec 02 12:19:33.612 INFO running `"docker" "start" "-a" "e3a90c9f3103236921e58f713766c2f48cf6233f5b1da59eca7e707abb768baa"`
Dec 02 12:19:34.085 INFO [stderr] usermod: no changes
Dec 02 12:19:34.159 INFO [stderr]    Compiling nock v0.4.0
Dec 02 12:19:35.851 INFO [stderr]    Compiling urbit v0.1.0 (/source)
Dec 02 12:19:36.771 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 12:19:36.771 INFO [stderr]  --> src/lib.rs:1:1
Dec 02 12:19:36.771 INFO [stderr]   |
Dec 02 12:19:36.771 INFO [stderr] 1 | #![feature(alloc_system)]
Dec 02 12:19:36.771 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 12:19:36.771 INFO [stderr] 
Dec 02 12:19:36.771 INFO [stderr] error: aborting due to previous error
Dec 02 12:19:36.771 INFO [stderr] 
Dec 02 12:19:36.771 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 12:19:36.779 INFO [stderr] error: Could not compile `urbit`.
Dec 02 12:19:36.779 INFO [stderr] 
Dec 02 12:19:36.779 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 12:19:36.779 INFO [stderr] su: No module specific data is present
Dec 02 12:19:37.323 INFO running `"docker" "inspect" "e3a90c9f3103236921e58f713766c2f48cf6233f5b1da59eca7e707abb768baa"`
Dec 02 12:19:37.537 INFO running `"docker" "rm" "-f" "e3a90c9f3103236921e58f713766c2f48cf6233f5b1da59eca7e707abb768baa"`
Dec 02 12:19:37.717 INFO [stdout] e3a90c9f3103236921e58f713766c2f48cf6233f5b1da59eca7e707abb768baa