Dec 02 18:09:33.777 INFO testing rwcell-0.1.2 against 1.30.1 for beta-1.31-5
Dec 02 18:09:33.777 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 18:09:34.135 INFO [stdout] cf0ae3a1dc03472225630b19eac9d78e7aa56833fce6a5bdba5de05a18cfc61b
Dec 02 18:09:34.143 INFO running `"docker" "start" "-a" "cf0ae3a1dc03472225630b19eac9d78e7aa56833fce6a5bdba5de05a18cfc61b"`
Dec 02 18:09:34.938 INFO [stderr] usermod: no changes
Dec 02 18:09:34.991 INFO [stderr]    Compiling rwcell v0.1.2 (/source)
Dec 02 18:09:35.555 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
Dec 02 18:09:35.555 INFO [stderr] su: No module specific data is present
Dec 02 18:09:36.059 INFO running `"docker" "inspect" "cf0ae3a1dc03472225630b19eac9d78e7aa56833fce6a5bdba5de05a18cfc61b"`
Dec 02 18:09:36.365 INFO running `"docker" "rm" "-f" "cf0ae3a1dc03472225630b19eac9d78e7aa56833fce6a5bdba5de05a18cfc61b"`
Dec 02 18:09:36.601 INFO [stdout] cf0ae3a1dc03472225630b19eac9d78e7aa56833fce6a5bdba5de05a18cfc61b
Dec 02 18:09:36.605 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 18:09:37.032 INFO [stdout] 5000a72e1da16b2ce896b2a0ce8f8d6ba77b69cf9fadfab1bdbc12a53f448fdb
Dec 02 18:09:37.034 INFO running `"docker" "start" "-a" "5000a72e1da16b2ce896b2a0ce8f8d6ba77b69cf9fadfab1bdbc12a53f448fdb"`
Dec 02 18:09:38.355 INFO [stderr] usermod: no changes
Dec 02 18:09:38.420 INFO [stderr]    Compiling rwcell v0.1.2 (/source)
Dec 02 18:09:39.123 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 18:09:39.123 INFO [stderr]  --> src/lib.rs:2:1
Dec 02 18:09:39.123 INFO [stderr]   |
Dec 02 18:09:39.123 INFO [stderr] 2 | #![feature(time2)]
Dec 02 18:09:39.123 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Dec 02 18:09:39.123 INFO [stderr] 
Dec 02 18:09:39.127 INFO [stderr] error: aborting due to previous error
Dec 02 18:09:39.127 INFO [stderr] 
Dec 02 18:09:39.127 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 18:09:39.135 INFO [stderr] error: Could not compile `rwcell`.
Dec 02 18:09:39.135 INFO [stderr] 
Dec 02 18:09:39.135 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 18:09:39.135 INFO [stderr] su: No module specific data is present
Dec 02 18:09:39.797 INFO running `"docker" "inspect" "5000a72e1da16b2ce896b2a0ce8f8d6ba77b69cf9fadfab1bdbc12a53f448fdb"`
Dec 02 18:09:40.027 INFO running `"docker" "rm" "-f" "5000a72e1da16b2ce896b2a0ce8f8d6ba77b69cf9fadfab1bdbc12a53f448fdb"`
Dec 02 18:09:40.330 INFO [stdout] 5000a72e1da16b2ce896b2a0ce8f8d6ba77b69cf9fadfab1bdbc12a53f448fdb