Dec 02 12:22:58.337 INFO testing unsafe_unwrap-0.1.0 against 1.30.1 for beta-1.31-5
Dec 02 12:22:58.338 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 12:22:58.569 INFO [stdout] 391257a95ea45f3746033e1fb1a8f94dc90a356856561031af6ccf3aa8e85b2b
Dec 02 12:22:58.571 INFO running `"docker" "start" "-a" "391257a95ea45f3746033e1fb1a8f94dc90a356856561031af6ccf3aa8e85b2b"`
Dec 02 12:22:59.098 INFO [stderr] usermod: no changes
Dec 02 12:22:59.122 INFO [stderr]    Compiling unsafe_unwrap v0.1.0 (/source)
Dec 02 12:22:59.199 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
Dec 02 12:22:59.201 INFO [stderr] su: No module specific data is present
Dec 02 12:22:59.547 INFO running `"docker" "inspect" "391257a95ea45f3746033e1fb1a8f94dc90a356856561031af6ccf3aa8e85b2b"`
Dec 02 12:22:59.612 INFO running `"docker" "rm" "-f" "391257a95ea45f3746033e1fb1a8f94dc90a356856561031af6ccf3aa8e85b2b"`
Dec 02 12:22:59.747 INFO [stdout] 391257a95ea45f3746033e1fb1a8f94dc90a356856561031af6ccf3aa8e85b2b
Dec 02 12:22:59.749 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 02 12:22:59.935 INFO [stdout] 6db168243fb37005805b3117af92fb8ae8ca0c94c32b4e9270a1c1a6c11cb896
Dec 02 12:22:59.938 INFO running `"docker" "start" "-a" "6db168243fb37005805b3117af92fb8ae8ca0c94c32b4e9270a1c1a6c11cb896"`
Dec 02 12:23:00.334 INFO [stderr] usermod: no changes
Dec 02 12:23:00.363 INFO [stderr]    Compiling unsafe_unwrap v0.1.0 (/source)
Dec 02 12:23:00.931 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 12:23:00.931 INFO [stderr]   --> src/lib.rs:23:19
Dec 02 12:23:00.931 INFO [stderr]    |
Dec 02 12:23:00.931 INFO [stderr] 23 | #![cfg_attr(test, feature(test))]
Dec 02 12:23:00.931 INFO [stderr]    |                   ^^^^^^^^^^^^^^
Dec 02 12:23:00.931 INFO [stderr] 
Dec 02 12:23:00.933 INFO [stderr] error: aborting due to previous error
Dec 02 12:23:00.933 INFO [stderr] 
Dec 02 12:23:00.933 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 12:23:00.935 INFO [stderr] error: Could not compile `unsafe_unwrap`.
Dec 02 12:23:00.935 INFO [stderr] 
Dec 02 12:23:00.935 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 12:23:00.936 INFO [stderr] su: No module specific data is present
Dec 02 12:23:01.201 INFO running `"docker" "inspect" "6db168243fb37005805b3117af92fb8ae8ca0c94c32b4e9270a1c1a6c11cb896"`
Dec 02 12:23:01.314 INFO running `"docker" "rm" "-f" "6db168243fb37005805b3117af92fb8ae8ca0c94c32b4e9270a1c1a6c11cb896"`
Dec 02 12:23:01.571 INFO [stdout] 6db168243fb37005805b3117af92fb8ae8ca0c94c32b4e9270a1c1a6c11cb896