Dec 03 18:57:29.659 INFO testing atsamd21e18a-0.3.1 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 03 18:57:29.659 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-0/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 03 18:57:29.999 INFO [stdout] 719cf4af249da034ca96c4d521dbc0105886fe2beb0252f3b6b1db879b9e3b23
Dec 03 18:57:30.003 INFO running `"docker" "start" "-a" "719cf4af249da034ca96c4d521dbc0105886fe2beb0252f3b6b1db879b9e3b23"`
Dec 03 18:57:31.022 INFO [stderr] usermod: no changes
Dec 03 18:57:31.199 INFO [stderr]    Compiling atsamd21e18a v0.3.1 (/source)
Dec 03 18:57:33.302 INFO [stderr] warning: lint `private_no_mangle_statics` has been removed: `no longer an warning, #[no_mangle] statics always exported`
Dec 03 18:57:33.302 INFO [stderr]    --> src/lib.rs:798:9
Dec 03 18:57:33.302 INFO [stderr]     |
Dec 03 18:57:33.302 INFO [stderr] 798 | #[allow(private_no_mangle_statics)]
Dec 03 18:57:33.302 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 18:57:33.302 INFO [stderr]     |
Dec 03 18:57:33.302 INFO [stderr]     = note: #[warn(renamed_and_removed_lints)] on by default
Dec 03 18:57:33.302 INFO [stderr] 
Dec 03 18:57:34.531 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 03 18:57:34.531 INFO [stderr]  --> src/lib.rs:5:1
Dec 03 18:57:34.531 INFO [stderr]   |
Dec 03 18:57:34.531 INFO [stderr] 5 | #![feature(untagged_unions)]
Dec 03 18:57:34.531 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 18:57:34.531 INFO [stderr] 
Dec 03 18:57:34.769 INFO [stderr] error: aborting due to previous error
Dec 03 18:57:34.769 INFO [stderr] 
Dec 03 18:57:34.769 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 18:57:34.778 INFO [stderr] error: Could not compile `atsamd21e18a`.
Dec 03 18:57:34.778 INFO [stderr] 
Dec 03 18:57:34.778 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 18:57:34.779 INFO [stderr] su: No module specific data is present
Dec 03 18:57:35.319 INFO running `"docker" "inspect" "719cf4af249da034ca96c4d521dbc0105886fe2beb0252f3b6b1db879b9e3b23"`
Dec 03 18:57:35.580 INFO running `"docker" "rm" "-f" "719cf4af249da034ca96c4d521dbc0105886fe2beb0252f3b6b1db879b9e3b23"`
Dec 03 18:57:35.742 INFO [stdout] 719cf4af249da034ca96c4d521dbc0105886fe2beb0252f3b6b1db879b9e3b23