Dec 02 19:22:55.280 INFO testing ruma-client-api-0.1.0 against 1.30.1 for beta-1.31-5
Dec 02 19:22:55.280 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-3/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 02 19:22:55.608 INFO [stdout] 3fe85cdf6ddd677f202ef21e5ef9e00388a91565580c56b13bd572f89773c2bd
Dec 02 19:22:55.613 INFO running `"docker" "start" "-a" "3fe85cdf6ddd677f202ef21e5ef9e00388a91565580c56b13bd572f89773c2bd"`
Dec 02 19:22:56.619 INFO [stderr] usermod: no changes
Dec 02 19:22:57.037 INFO [stderr]    Compiling crossbeam-utils v0.6.1
Dec 02 19:22:57.043 INFO [stderr]    Compiling base64 v0.5.2
Dec 02 19:22:57.043 INFO [stderr]    Compiling tokio-service v0.1.0
Dec 02 19:22:57.043 INFO [stderr]    Compiling relay v0.1.1
Dec 02 19:22:57.051 INFO [stderr]    Compiling want v0.0.4
Dec 02 19:22:57.051 INFO [stderr]    Compiling tokio-current-thread v0.1.4
Dec 02 19:22:57.059 INFO [stderr]    Compiling memchr v2.1.1
Dec 02 19:22:57.063 INFO [stderr]    Compiling bytes v0.4.11
Dec 02 19:23:00.471 INFO [stderr]    Compiling futures-cpupool v0.1.8
Dec 02 19:23:01.085 INFO [stderr]    Compiling serde_urlencoded v0.5.4
Dec 02 19:23:01.112 INFO [stderr]    Compiling mio-uds v0.6.7
Dec 02 19:23:01.112 INFO [stderr]    Compiling crossbeam-epoch v0.6.1
Dec 02 19:23:01.112 INFO [stderr]    Compiling tokio-timer v0.2.8
Dec 02 19:23:01.195 INFO [stderr]    Compiling rayon v0.7.1
Dec 02 19:23:05.318 INFO [stderr]    Compiling aho-corasick v0.6.9
Dec 02 19:23:05.323 INFO [stderr]    Compiling tokio-io v0.1.10
Dec 02 19:23:05.463 INFO [stderr]    Compiling crossbeam-deque v0.6.2
Dec 02 19:23:08.259 INFO [stderr]    Compiling regex v0.2.11
Dec 02 19:23:08.351 INFO [stderr]    Compiling tokio-threadpool v0.1.9
Dec 02 19:23:08.723 INFO [stderr]    Compiling tokio-codec v0.1.1
Dec 02 19:23:08.723 INFO [stderr]    Compiling tokio-reactor v0.1.7
Dec 02 19:23:09.165 INFO [stderr]    Compiling ring v0.9.7
Dec 02 19:23:15.999 INFO [stderr]    Compiling tokio-tcp v0.1.2
Dec 02 19:23:16.250 INFO [stderr]    Compiling tokio-udp v0.1.3
Dec 02 19:23:16.283 INFO [stderr]    Compiling tokio-uds v0.2.4
Dec 02 19:23:16.287 INFO [stderr]    Compiling tokio-fs v0.1.4
Dec 02 19:23:24.475 INFO [stderr]    Compiling ruma-identifiers v0.11.0
Dec 02 19:23:24.859 INFO [stderr]    Compiling tokio v0.1.13
Dec 02 19:23:26.499 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 19:23:26.499 INFO [stderr]  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/ruma-identifiers-0.11.0/src/lib.rs:4:1
Dec 02 19:23:26.499 INFO [stderr]   |
Dec 02 19:23:26.499 INFO [stderr] 4 | #![feature(try_from)]
Dec 02 19:23:26.499 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
Dec 02 19:23:26.499 INFO [stderr] 
Dec 02 19:23:26.499 INFO [stderr] error: aborting due to previous error
Dec 02 19:23:26.499 INFO [stderr] 
Dec 02 19:23:26.499 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 19:23:26.511 INFO [stderr] error: Could not compile `ruma-identifiers`.
Dec 02 19:23:26.511 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 02 19:23:30.463 INFO [stderr] error: build failed
Dec 02 19:23:30.463 INFO [stderr] su: No module specific data is present
Dec 02 19:23:31.184 INFO running `"docker" "inspect" "3fe85cdf6ddd677f202ef21e5ef9e00388a91565580c56b13bd572f89773c2bd"`
Dec 02 19:23:31.543 INFO running `"docker" "rm" "-f" "3fe85cdf6ddd677f202ef21e5ef9e00388a91565580c56b13bd572f89773c2bd"`
Dec 02 19:23:31.922 INFO [stdout] 3fe85cdf6ddd677f202ef21e5ef9e00388a91565580c56b13bd572f89773c2bd