Dec 02 19:32:00.874 INFO testing rtfm-syntax-0.3.4 against 1.30.1 for beta-1.31-5
Dec 02 19:32:00.874 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/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 19:32:01.312 INFO [stdout] 05134afd459f8e84fab24b60ba54f8bcdcdb92b5112c8d21fee1c8ae20b155ac
Dec 02 19:32:01.320 INFO running `"docker" "start" "-a" "05134afd459f8e84fab24b60ba54f8bcdcdb92b5112c8d21fee1c8ae20b155ac"`
Dec 02 19:32:02.405 INFO [stderr] usermod: no changes
Dec 02 19:32:02.578 INFO [stderr]    Compiling proc-macro2 v0.4.24
Dec 02 19:32:09.987 INFO [stderr]    Compiling quote v0.6.10
Dec 02 19:32:14.519 INFO [stderr]    Compiling syn v0.15.22
Dec 02 19:32:14.519 INFO [stderr]    Compiling syn v0.14.9
Dec 02 19:32:31.539 INFO [stderr]    Compiling synstructure v0.10.1
Dec 02 19:32:44.001 INFO [stderr]    Compiling failure_derive v0.1.3
Dec 02 19:32:49.547 INFO [stderr]    Compiling failure v0.1.3
Dec 02 19:32:50.958 INFO [stderr]    Compiling rtfm-syntax v0.3.4 (/source)
Dec 02 19:32:55.231 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 19:32:55.231 INFO [stderr]  --> src/lib.rs:5:1
Dec 02 19:32:55.231 INFO [stderr]   |
Dec 02 19:32:55.231 INFO [stderr] 5 | #![feature(proc_macro_diagnostic)]
Dec 02 19:32:55.231 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 19:32:55.231 INFO [stderr] 
Dec 02 19:32:55.231 INFO [stderr] error[E0554]: #![feature] may not be used on the stable release channel
Dec 02 19:32:55.231 INFO [stderr]  --> src/lib.rs:6:1
Dec 02 19:32:55.231 INFO [stderr]   |
Dec 02 19:32:55.231 INFO [stderr] 6 | #![feature(try_from)]
Dec 02 19:32:55.231 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
Dec 02 19:32:55.231 INFO [stderr] 
Dec 02 19:32:55.231 INFO [stderr] error: aborting due to 2 previous errors
Dec 02 19:32:55.231 INFO [stderr] 
Dec 02 19:32:55.231 INFO [stderr] For more information about this error, try `rustc --explain E0554`.
Dec 02 19:32:55.237 INFO [stderr] error: Could not compile `rtfm-syntax`.
Dec 02 19:32:55.237 INFO [stderr] 
Dec 02 19:32:55.237 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 19:32:55.243 INFO [stderr] su: No module specific data is present
Dec 02 19:32:55.732 INFO running `"docker" "inspect" "05134afd459f8e84fab24b60ba54f8bcdcdb92b5112c8d21fee1c8ae20b155ac"`
Dec 02 19:32:56.085 INFO running `"docker" "rm" "-f" "05134afd459f8e84fab24b60ba54f8bcdcdb92b5112c8d21fee1c8ae20b155ac"`
Dec 02 19:32:56.475 INFO [stdout] 05134afd459f8e84fab24b60ba54f8bcdcdb92b5112c8d21fee1c8ae20b155ac