Dec 02 14:42:35.840 INFO testing tars-stream-0.1.1 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 14:42:35.840 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-4/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/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 14:42:36.367 INFO [stdout] 4622d8fd324276e8052b948f5cb97b67ab3bbefd81f92b8dca5859f30326ef95
Dec 02 14:42:36.375 INFO running `"docker" "start" "-a" "4622d8fd324276e8052b948f5cb97b67ab3bbefd81f92b8dca5859f30326ef95"`
Dec 02 14:42:37.727 INFO [stderr] usermod: no changes
Dec 02 14:42:37.803 INFO [stderr]    Compiling tars-stream v0.1.1 (/source)
Dec 02 14:42:38.751 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 14:42:38.751 INFO [stderr]  --> src/lib.rs:1:1
Dec 02 14:42:38.751 INFO [stderr]   |
Dec 02 14:42:38.751 INFO [stderr] 1 | #![feature(try_from)]
Dec 02 14:42:38.751 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
Dec 02 14:42:38.751 INFO [stderr] 
Dec 02 14:42:38.751 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 14:42:38.751 INFO [stderr]  --> src/lib.rs:2:1
Dec 02 14:42:38.751 INFO [stderr]   |
Dec 02 14:42:38.751 INFO [stderr] 2 | #![feature(core_intrinsics)]
Dec 02 14:42:38.751 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 14:42:38.751 INFO [stderr] 
Dec 02 14:42:38.751 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 14:42:38.751 INFO [stderr]  --> src/lib.rs:3:1
Dec 02 14:42:38.751 INFO [stderr]   |
Dec 02 14:42:38.751 INFO [stderr] 3 | #![feature(extern_prelude)]
Dec 02 14:42:38.751 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 14:42:38.751 INFO [stderr] 
Dec 02 14:42:38.751 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 14:42:38.751 INFO [stderr]  --> src/lib.rs:4:1
Dec 02 14:42:38.751 INFO [stderr]   |
Dec 02 14:42:38.751 INFO [stderr] 4 | #![feature(specialization)]
Dec 02 14:42:38.751 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 14:42:38.751 INFO [stderr] 
Dec 02 14:42:38.759 INFO [stderr] error: aborting due to 4 previous errors
Dec 02 14:42:38.759 INFO [stderr] 
Dec 02 14:42:38.759 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 14:42:38.759 INFO [stderr] error: Could not compile `tars-stream`.
Dec 02 14:42:38.759 INFO [stderr] 
Dec 02 14:42:38.759 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 14:42:38.759 INFO [stderr] su: No module specific data is present
Dec 02 14:42:39.871 INFO running `"docker" "inspect" "4622d8fd324276e8052b948f5cb97b67ab3bbefd81f92b8dca5859f30326ef95"`
Dec 02 14:42:40.215 INFO running `"docker" "rm" "-f" "4622d8fd324276e8052b948f5cb97b67ab3bbefd81f92b8dca5859f30326ef95"`
Dec 02 14:42:40.631 INFO [stdout] 4622d8fd324276e8052b948f5cb97b67ab3bbefd81f92b8dca5859f30326ef95