Dec 03 02:38:49.940 INFO testing lmdb-rkv-0.8.2 against 1.30.1 for beta-1.31-5
Dec 03 02:38:49.940 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 03 02:38:50.159 INFO [stdout] d44799bb8a3b135b2ef4af67bf38fe683c8b12e05a6a523e2beac4b20c6b0508
Dec 03 02:38:50.161 INFO running `"docker" "start" "-a" "d44799bb8a3b135b2ef4af67bf38fe683c8b12e05a6a523e2beac4b20c6b0508"`
Dec 03 02:38:50.663 INFO [stderr] usermod: no changes
Dec 03 02:38:50.720 INFO [stderr]    Compiling lmdb-rkv v0.8.2 (/source)
Dec 03 02:38:52.103 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.42s
Dec 03 02:38:52.104 INFO [stderr] su: No module specific data is present
Dec 03 02:38:52.540 INFO running `"docker" "inspect" "d44799bb8a3b135b2ef4af67bf38fe683c8b12e05a6a523e2beac4b20c6b0508"`
Dec 03 02:38:52.635 INFO running `"docker" "rm" "-f" "d44799bb8a3b135b2ef4af67bf38fe683c8b12e05a6a523e2beac4b20c6b0508"`
Dec 03 02:38:52.717 INFO [stdout] d44799bb8a3b135b2ef4af67bf38fe683c8b12e05a6a523e2beac4b20c6b0508
Dec 03 02:38:52.722 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 test --frozen --no-run" "-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 02:38:52.943 INFO [stdout] 55f8dd496e175feabe1da13253ccdd0e862afda15ddd4f3ed1bf5398ec6647d2
Dec 03 02:38:52.947 INFO running `"docker" "start" "-a" "55f8dd496e175feabe1da13253ccdd0e862afda15ddd4f3ed1bf5398ec6647d2"`
Dec 03 02:38:53.522 INFO [stderr] usermod: no changes
Dec 03 02:38:53.565 INFO [stderr]    Compiling lmdb-rkv v0.8.2 (/source)
Dec 03 02:38:54.451 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 03 02:38:54.451 INFO [stderr]  --> src/lib.rs:4:19
Dec 03 02:38:54.451 INFO [stderr]   |
Dec 03 02:38:54.451 INFO [stderr] 4 | #![cfg_attr(test, feature(test))]
Dec 03 02:38:54.451 INFO [stderr]   |                   ^^^^^^^^^^^^^^
Dec 03 02:38:54.451 INFO [stderr] 
Dec 03 02:38:54.457 INFO [stderr] error: aborting due to previous error
Dec 03 02:38:54.457 INFO [stderr] 
Dec 03 02:38:54.457 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 03 02:38:54.464 INFO [stderr] error: Could not compile `lmdb-rkv`.
Dec 03 02:38:54.464 INFO [stderr] 
Dec 03 02:38:54.464 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 02:38:54.466 INFO [stderr] su: No module specific data is present
Dec 03 02:38:54.767 INFO running `"docker" "inspect" "55f8dd496e175feabe1da13253ccdd0e862afda15ddd4f3ed1bf5398ec6647d2"`
Dec 03 02:38:54.902 INFO running `"docker" "rm" "-f" "55f8dd496e175feabe1da13253ccdd0e862afda15ddd4f3ed1bf5398ec6647d2"`
Dec 03 02:38:55.093 INFO [stdout] 55f8dd496e175feabe1da13253ccdd0e862afda15ddd4f3ed1bf5398ec6647d2