Dec 03 19:11:55.600 INFO testing ascii_num-0.1.2 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 03 19:11:55.600 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 03 19:11:55.797 INFO [stdout] f10268a740bc37184165b810a9e5dd93cbbca3ca2dd2469622fe5e7c335d2b1a
Dec 03 19:11:55.798 INFO running `"docker" "start" "-a" "f10268a740bc37184165b810a9e5dd93cbbca3ca2dd2469622fe5e7c335d2b1a"`
Dec 03 19:11:56.206 INFO [stderr] usermod: no changes
Dec 03 19:11:56.235 INFO [stderr]    Compiling ascii_num v0.1.2 (/source)
Dec 03 19:11:56.840 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 03 19:11:56.840 INFO [stderr]  --> src/lib.rs:1:1
Dec 03 19:11:56.840 INFO [stderr]   |
Dec 03 19:11:56.840 INFO [stderr] 1 | #![feature(trusted_len)]
Dec 03 19:11:56.840 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 19:11:56.840 INFO [stderr] 
Dec 03 19:11:56.840 INFO [stderr] error: aborting due to previous error
Dec 03 19:11:56.840 INFO [stderr] 
Dec 03 19:11:56.840 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 19:11:56.846 INFO [stderr] error: Could not compile `ascii_num`.
Dec 03 19:11:56.846 INFO [stderr] 
Dec 03 19:11:56.846 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 19:11:56.848 INFO [stderr] su: No module specific data is present
Dec 03 19:11:57.260 INFO running `"docker" "inspect" "f10268a740bc37184165b810a9e5dd93cbbca3ca2dd2469622fe5e7c335d2b1a"`
Dec 03 19:11:57.345 INFO running `"docker" "rm" "-f" "f10268a740bc37184165b810a9e5dd93cbbca3ca2dd2469622fe5e7c335d2b1a"`
Dec 03 19:11:57.430 INFO [stdout] f10268a740bc37184165b810a9e5dd93cbbca3ca2dd2469622fe5e7c335d2b1a