Dec 02 12:24:37.037 INFO testing unix-0.6.4 against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 12:24:37.037 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 12:24:37.223 INFO [stdout] 608ca8c5189071573e4a0dc68336978f007e8582c3b524a126dcaf710318ff96
Dec 02 12:24:37.228 INFO running `"docker" "start" "-a" "608ca8c5189071573e4a0dc68336978f007e8582c3b524a126dcaf710318ff96"`
Dec 02 12:24:37.750 INFO [stderr] usermod: no changes
Dec 02 12:24:37.833 INFO [stderr]    Compiling ptr v0.2.1
Dec 02 12:24:37.834 INFO [stderr]    Compiling hash-table v0.2.2
Dec 02 12:24:37.834 INFO [stderr]    Compiling libc v0.2.44
Dec 02 12:24:37.834 INFO [stderr]    Compiling slot v0.2.5
Dec 02 12:24:37.834 INFO [stderr]    Compiling containers v0.9.5
Dec 02 12:24:37.834 INFO [stderr]    Compiling idem v0.4.0
Dec 02 12:24:37.834 INFO [stderr]    Compiling rel v0.2.0
Dec 02 12:24:37.838 INFO [stderr]    Compiling i-o v0.4.4
Dec 02 12:24:37.907 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 12:24:37.908 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/slot-0.2.5/src/lib.rs:3:1
Dec 02 12:24:37.908 INFO [stderr]   |
Dec 02 12:24:37.908 INFO [stderr] 3 | #![feature(const_fn)]
Dec 02 12:24:37.908 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
Dec 02 12:24:37.908 INFO [stderr] 
Dec 02 12:24:37.908 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 12:24:37.908 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/slot-0.2.5/src/lib.rs:4:1
Dec 02 12:24:37.908 INFO [stderr]   |
Dec 02 12:24:37.908 INFO [stderr] 4 | #![feature(const_fn_union)]
Dec 02 12:24:37.908 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 12:24:37.908 INFO [stderr] 
Dec 02 12:24:37.908 INFO [stderr] error[E0554]: #![feature] may not be used on the beta release channel
Dec 02 12:24:37.908 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/slot-0.2.5/src/lib.rs:5:1
Dec 02 12:24:37.908 INFO [stderr]   |
Dec 02 12:24:37.908 INFO [stderr] 5 | #![feature(untagged_unions)]
Dec 02 12:24:37.908 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 12:24:37.908 INFO [stderr] 
Dec 02 12:24:37.908 INFO [stderr] error: aborting due to 3 previous errors
Dec 02 12:24:37.908 INFO [stderr] 
Dec 02 12:24:37.908 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 12:24:37.909 INFO [stderr] error: Could not compile `slot`.
Dec 02 12:24:37.909 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 02 12:24:38.919 INFO [stderr] error: build failed
Dec 02 12:24:38.921 INFO [stderr] su: No module specific data is present
Dec 02 12:24:39.239 INFO running `"docker" "inspect" "608ca8c5189071573e4a0dc68336978f007e8582c3b524a126dcaf710318ff96"`
Dec 02 12:24:39.304 INFO running `"docker" "rm" "-f" "608ca8c5189071573e4a0dc68336978f007e8582c3b524a126dcaf710318ff96"`
Dec 02 12:24:39.454 INFO [stdout] 608ca8c5189071573e4a0dc68336978f007e8582c3b524a126dcaf710318ff96