Dec 02 15:35:40.960 INFO testing stack_dst-0.4.2 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 15:35:40.960 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-3/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 15:35:41.403 INFO [stdout] 5157ca9944545e4b9d7ed3d9e7f57d960003aa5c4906eb8e41c40c173c27b3b3
Dec 02 15:35:41.405 INFO running `"docker" "start" "-a" "5157ca9944545e4b9d7ed3d9e7f57d960003aa5c4906eb8e41c40c173c27b3b3"`
Dec 02 15:35:42.839 INFO [stderr] usermod: no changes
Dec 02 15:35:42.890 INFO [stderr]    Compiling stack_dst v0.4.2 (/source)
Dec 02 15:35:43.402 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 15:35:43.403 INFO [stderr]   --> src/lib.rs:33:1
Dec 02 15:35:43.403 INFO [stderr]    |
Dec 02 15:35:43.403 INFO [stderr] 33 | #![feature(unsize)]    // needed for Unsize
Dec 02 15:35:43.403 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^
Dec 02 15:35:43.403 INFO [stderr] 
Dec 02 15:35:43.405 INFO [stderr] error: aborting due to previous error
Dec 02 15:35:43.405 INFO [stderr] 
Dec 02 15:35:43.405 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 15:35:43.407 INFO [stderr] error: Could not compile `stack_dst`.
Dec 02 15:35:43.407 INFO [stderr] 
Dec 02 15:35:43.407 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 15:35:43.408 INFO [stderr] su: No module specific data is present
Dec 02 15:35:44.266 INFO running `"docker" "inspect" "5157ca9944545e4b9d7ed3d9e7f57d960003aa5c4906eb8e41c40c173c27b3b3"`
Dec 02 15:35:44.655 INFO running `"docker" "rm" "-f" "5157ca9944545e4b9d7ed3d9e7f57d960003aa5c4906eb8e41c40c173c27b3b3"`
Dec 02 15:35:44.979 INFO [stdout] 5157ca9944545e4b9d7ed3d9e7f57d960003aa5c4906eb8e41c40c173c27b3b3