Dec 02 14:46:20.096 INFO testing tag_safe-0.2.15 against 1.30.1 for beta-1.31-5
Dec 02 14:46:20.096 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 14:46:20.267 INFO [stdout] 77b540d7a4b43e506afa4ef037fad75fa95272fe452871678eda258c4f4658cd
Dec 02 14:46:20.269 INFO running `"docker" "start" "-a" "77b540d7a4b43e506afa4ef037fad75fa95272fe452871678eda258c4f4658cd"`
Dec 02 14:46:20.739 INFO [stderr] usermod: no changes
Dec 02 14:46:20.810 INFO [stderr]    Compiling tag_safe v0.2.15 (/source)
Dec 02 14:46:25.374 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 14:46:25.374 INFO [stderr]   --> src/lib.rs:23:1
Dec 02 14:46:25.374 INFO [stderr]    |
Dec 02 14:46:25.374 INFO [stderr] 23 | #![feature(plugin_registrar, rustc_private)]
Dec 02 14:46:25.374 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 14:46:25.374 INFO [stderr] 
Dec 02 14:46:25.374 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 14:46:25.374 INFO [stderr]   --> src/lib.rs:24:1
Dec 02 14:46:25.374 INFO [stderr]    |
Dec 02 14:46:25.374 INFO [stderr] 24 | #![feature(macro_at_most_once_rep)] // also needed for a macro (lint_array)
Dec 02 14:46:25.374 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 14:46:25.374 INFO [stderr] 
Dec 02 14:46:25.374 INFO [stderr] error: aborting due to 2 previous errors
Dec 02 14:46:25.374 INFO [stderr] 
Dec 02 14:46:25.374 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 14:46:25.384 INFO [stderr] error: Could not compile `tag_safe`.
Dec 02 14:46:25.384 INFO [stderr] 
Dec 02 14:46:25.384 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 14:46:25.386 INFO [stderr] su: No module specific data is present
Dec 02 14:46:25.697 INFO running `"docker" "inspect" "77b540d7a4b43e506afa4ef037fad75fa95272fe452871678eda258c4f4658cd"`
Dec 02 14:46:25.773 INFO running `"docker" "rm" "-f" "77b540d7a4b43e506afa4ef037fad75fa95272fe452871678eda258c4f4658cd"`
Dec 02 14:46:25.860 INFO [stdout] 77b540d7a4b43e506afa4ef037fad75fa95272fe452871678eda258c4f4658cd