Dec 03 17:41:04.136 INFO testing buf-0.2.2 against 1.30.1 for beta-1.31-5
Dec 03 17:41:04.136 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-1/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/beta-1.31-5/1.30.1:/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 +1.30.1 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 17:41:04.341 INFO [stdout] a50adc69ca253f3f8a7754c9ab29241738832ed11055f635e9fdc81eac3a77a1
Dec 03 17:41:04.344 INFO running `"docker" "start" "-a" "a50adc69ca253f3f8a7754c9ab29241738832ed11055f635e9fdc81eac3a77a1"`
Dec 03 17:41:04.727 INFO [stderr] usermod: no changes
Dec 03 17:41:04.771 INFO [stderr]    Compiling ptr v0.2.1
Dec 03 17:41:04.771 INFO [stderr]    Compiling hash-table v0.2.2
Dec 03 17:41:04.771 INFO [stderr]    Compiling slot v0.2.5
Dec 03 17:41:04.775 INFO [stderr]    Compiling containers v0.9.5
Dec 03 17:41:04.775 INFO [stderr]    Compiling i-o v0.4.4
Dec 03 17:41:04.777 INFO [stderr]    Compiling rel v0.2.0
Dec 03 17:41:04.778 INFO [stderr]    Compiling heap v0.1.0
Dec 03 17:41:04.844 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 17:41:04.844 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/slot-0.2.5/src/lib.rs:3:1
Dec 03 17:41:04.844 INFO [stderr]   |
Dec 03 17:41:04.844 INFO [stderr] 3 | #![feature(const_fn)]
Dec 03 17:41:04.844 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
Dec 03 17:41:04.844 INFO [stderr] 
Dec 03 17:41:04.845 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 17:41:04.845 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/slot-0.2.5/src/lib.rs:4:1
Dec 03 17:41:04.845 INFO [stderr]   |
Dec 03 17:41:04.845 INFO [stderr] 4 | #![feature(const_fn_union)]
Dec 03 17:41:04.845 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 17:41:04.845 INFO [stderr] 
Dec 03 17:41:04.845 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 17:41:04.845 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/slot-0.2.5/src/lib.rs:5:1
Dec 03 17:41:04.845 INFO [stderr]   |
Dec 03 17:41:04.845 INFO [stderr] 5 | #![feature(untagged_unions)]
Dec 03 17:41:04.845 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 03 17:41:04.845 INFO [stderr] 
Dec 03 17:41:04.845 INFO [stderr] error: aborting due to 3 previous errors
Dec 03 17:41:04.845 INFO [stderr] 
Dec 03 17:41:04.846 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 17:41:04.850 INFO [stderr] error: Could not compile `slot`.
Dec 03 17:41:04.850 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 03 17:41:05.981 INFO [stderr] error: build failed
Dec 03 17:41:05.983 INFO [stderr] su: No module specific data is present
Dec 03 17:41:06.216 INFO running `"docker" "inspect" "a50adc69ca253f3f8a7754c9ab29241738832ed11055f635e9fdc81eac3a77a1"`
Dec 03 17:41:06.312 INFO running `"docker" "rm" "-f" "a50adc69ca253f3f8a7754c9ab29241738832ed11055f635e9fdc81eac3a77a1"`
Dec 03 17:41:06.504 INFO [stdout] a50adc69ca253f3f8a7754c9ab29241738832ed11055f635e9fdc81eac3a77a1