Dec 02 11:47:38.502 INFO testing virtual_view-0.2.2 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 11:47:38.502 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 11:47:38.786 INFO [stdout] eac8cd77f6012bdcf9455d8c3cf311443b185d842d4fa8eecbae8ce94a8d71f7
Dec 02 11:47:38.793 INFO running `"docker" "start" "-a" "eac8cd77f6012bdcf9455d8c3cf311443b185d842d4fa8eecbae8ce94a8d71f7"`
Dec 02 11:47:39.607 INFO [stderr] usermod: no changes
Dec 02 11:47:39.723 INFO [stderr]    Compiling messenger v0.1.0
Dec 02 11:47:40.309 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 11:47:40.309 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/messenger-0.1.0/src/lib.rs:1:1
Dec 02 11:47:40.310 INFO [stderr]   |
Dec 02 11:47:40.310 INFO [stderr] 1 | #![feature(integer_atomics)]
Dec 02 11:47:40.310 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 11:47:40.310 INFO [stderr] 
Dec 02 11:47:40.310 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 11:47:40.310 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/messenger-0.1.0/src/lib.rs:2:1
Dec 02 11:47:40.310 INFO [stderr]   |
Dec 02 11:47:40.311 INFO [stderr] 2 | #![feature(conservative_impl_trait)]
Dec 02 11:47:40.311 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 11:47:40.311 INFO [stderr] 
Dec 02 11:47:40.311 INFO [stderr] error: aborting due to 2 previous errors
Dec 02 11:47:40.311 INFO [stderr] 
Dec 02 11:47:40.311 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 11:47:40.327 INFO [stderr] error: Could not compile `messenger`.
Dec 02 11:47:40.327 INFO [stderr] 
Dec 02 11:47:40.327 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 11:47:40.329 INFO [stderr] su: No module specific data is present
Dec 02 11:47:40.792 INFO running `"docker" "inspect" "eac8cd77f6012bdcf9455d8c3cf311443b185d842d4fa8eecbae8ce94a8d71f7"`
Dec 02 11:47:41.077 INFO running `"docker" "rm" "-f" "eac8cd77f6012bdcf9455d8c3cf311443b185d842d4fa8eecbae8ce94a8d71f7"`
Dec 02 11:47:41.301 INFO [stdout] eac8cd77f6012bdcf9455d8c3cf311443b185d842d4fa8eecbae8ce94a8d71f7