Dec 02 20:20:51.590 INFO testing rgen3-save-0.1.0 against 1.30.1 for beta-1.31-5
Dec 02 20:20:51.590 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 20:20:51.744 INFO [stdout] 1b94f927858b5d6e3e6f7282ea705d4249fec53fcb6517c029b04659eeab4059
Dec 02 20:20:51.747 INFO running `"docker" "start" "-a" "1b94f927858b5d6e3e6f7282ea705d4249fec53fcb6517c029b04659eeab4059"`
Dec 02 20:20:52.831 INFO [stderr] usermod: no changes
Dec 02 20:20:52.923 INFO [stderr]    Compiling rgen3-string v0.1.0
Dec 02 20:20:54.486 INFO [stderr]    Compiling rgen3-save v0.1.0 (/source)
Dec 02 20:20:55.262 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 20:20:55.262 INFO [stderr]  --> src/lib.rs:3:1
Dec 02 20:20:55.262 INFO [stderr]   |
Dec 02 20:20:55.262 INFO [stderr] 3 | #![feature(associated_consts, question_mark)]
Dec 02 20:20:55.262 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 20:20:55.262 INFO [stderr] 
Dec 02 20:20:55.265 INFO [stderr] error: aborting due to previous error
Dec 02 20:20:55.265 INFO [stderr] 
Dec 02 20:20:55.265 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 20:20:55.274 INFO [stderr] error: Could not compile `rgen3-save`.
Dec 02 20:20:55.274 INFO [stderr] 
Dec 02 20:20:55.274 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 20:20:55.274 INFO [stderr] su: No module specific data is present
Dec 02 20:20:55.543 INFO running `"docker" "inspect" "1b94f927858b5d6e3e6f7282ea705d4249fec53fcb6517c029b04659eeab4059"`
Dec 02 20:20:55.659 INFO running `"docker" "rm" "-f" "1b94f927858b5d6e3e6f7282ea705d4249fec53fcb6517c029b04659eeab4059"`
Dec 02 20:20:55.761 INFO [stdout] 1b94f927858b5d6e3e6f7282ea705d4249fec53fcb6517c029b04659eeab4059