Nov 02 02:45:47.746 INFO testing tftp_server-0.0.2 against 1.30.0 for beta-1.31-1
Nov 02 02:45:47.746 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-1/worker-2/1.30.0:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/beta-1.31-1/1.30.0:/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 +1.30.0 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"`
Nov 02 02:45:48.219 INFO blam! 14c12512f286293dbf3be988105b02e2f271683a05a72bc2934f2a2a8699e501
Nov 02 02:45:48.227 INFO running `"docker" "start" "-a" "14c12512f286293dbf3be988105b02e2f271683a05a72bc2934f2a2a8699e501"`
Nov 02 02:45:49.294 INFO kablam! usermod: no changes
Nov 02 02:45:49.394 INFO kablam!    Compiling tftp_server v0.0.2 (/source)
Nov 02 02:45:50.727 INFO kablam! error[E0554]: #![feature] may not be used on the stable release channel
Nov 02 02:45:50.727 INFO kablam!  --> src/lib.rs:1:1
Nov 02 02:45:50.727 INFO kablam!   |
Nov 02 02:45:50.727 INFO kablam! 1 | #![feature(question_mark)]
Nov 02 02:45:50.727 INFO kablam!   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 02 02:45:50.727 INFO kablam! 
Nov 02 02:45:50.730 INFO kablam! error: aborting due to previous error
Nov 02 02:45:50.730 INFO kablam! 
Nov 02 02:45:50.730 INFO kablam! For more information about this error, try `rustc --explain E0554`.
Nov 02 02:45:50.737 INFO kablam! error: Could not compile `tftp_server`.
Nov 02 02:45:50.737 INFO kablam! 
Nov 02 02:45:50.737 INFO kablam! To learn more, run the command again with --verbose.
Nov 02 02:45:50.739 INFO kablam! su: No module specific data is present
Nov 02 02:45:51.016 INFO running `"docker" "rm" "-f" "14c12512f286293dbf3be988105b02e2f271683a05a72bc2934f2a2a8699e501"`
Nov 02 02:45:51.147 INFO blam! 14c12512f286293dbf3be988105b02e2f271683a05a72bc2934f2a2a8699e501
