Dec 03 19:11:57.033 INFO testing ascii_num-0.1.2 against 1.30.1 for beta-1.31-5
Dec 03 19:11:57.033 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-6/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/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 03 19:11:57.316 INFO [stdout] 3c0262870c08af5c7a0df25da2bd238e1808ecd305ed9e992639a221f6fa5bc9
Dec 03 19:11:57.318 INFO running `"docker" "start" "-a" "3c0262870c08af5c7a0df25da2bd238e1808ecd305ed9e992639a221f6fa5bc9"`
Dec 03 19:11:57.831 INFO [stderr] usermod: no changes
Dec 03 19:11:57.878 INFO [stderr]    Compiling ascii_num v0.1.2 (/source)
Dec 03 19:11:58.480 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 19:11:58.480 INFO [stderr]  --> src/lib.rs:1:1
Dec 03 19:11:58.480 INFO [stderr]   |
Dec 03 19:11:58.480 INFO [stderr] 1 | #![feature(trusted_len)]
Dec 03 19:11:58.480 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 19:11:58.480 INFO [stderr] 
Dec 03 19:11:58.480 INFO [stderr] error: aborting due to previous error
Dec 03 19:11:58.480 INFO [stderr] 
Dec 03 19:11:58.480 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 19:11:58.487 INFO [stderr] error: Could not compile `ascii_num`.
Dec 03 19:11:58.487 INFO [stderr] 
Dec 03 19:11:58.487 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 19:11:58.488 INFO [stderr] su: No module specific data is present
Dec 03 19:11:58.909 INFO running `"docker" "inspect" "3c0262870c08af5c7a0df25da2bd238e1808ecd305ed9e992639a221f6fa5bc9"`
Dec 03 19:11:59.032 INFO running `"docker" "rm" "-f" "3c0262870c08af5c7a0df25da2bd238e1808ecd305ed9e992639a221f6fa5bc9"`
Dec 03 19:11:59.163 INFO [stdout] 3c0262870c08af5c7a0df25da2bd238e1808ecd305ed9e992639a221f6fa5bc9