Dec 05 09:02:49.649 INFO checking plex-0.2.3 against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 09:02:49.649 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-6/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 09:02:49.873 INFO [stdout] f000bf7084b995197277aaa51a83bfa7f0edf9b036955d15c5653a3b7131f80b
Dec 05 09:02:49.878 INFO running `"docker" "start" "-a" "f000bf7084b995197277aaa51a83bfa7f0edf9b036955d15c5653a3b7131f80b"`
Dec 05 09:02:50.472 INFO [stderr] usermod: no changes
Dec 05 09:02:50.544 INFO [stderr]    Compiling vec_map v0.6.0
Dec 05 09:02:50.544 INFO [stderr]    Compiling lalr v0.0.2
Dec 05 09:02:50.544 INFO [stderr]     Checking redfa v0.0.2
Dec 05 09:02:50.544 INFO [stderr]    Compiling syn v0.14.9
Dec 05 09:02:54.019 INFO [stderr]     Checking plex v0.2.3 (/source)
Dec 05 09:03:30.348 INFO [stderr] error[E0557]: feature has been removed
Dec 05 09:03:30.348 INFO [stderr]  --> examples/demo.rs:1:12
Dec 05 09:03:30.348 INFO [stderr]   |
Dec 05 09:03:30.348 INFO [stderr] 1 | #![feature(proc_macro_gen)]
Dec 05 09:03:30.348 INFO [stderr]   |            ^^^^^^^^^^^^^^
Dec 05 09:03:30.348 INFO [stderr]   |
Dec 05 09:03:30.348 INFO [stderr] note: subsumed by `#![feature(proc_macro_hygiene)]`
Dec 05 09:03:30.348 INFO [stderr]  --> examples/demo.rs:1:12
Dec 05 09:03:30.348 INFO [stderr]   |
Dec 05 09:03:30.348 INFO [stderr] 1 | #![feature(proc_macro_gen)]
Dec 05 09:03:30.348 INFO [stderr]   |            ^^^^^^^^^^^^^^
Dec 05 09:03:30.348 INFO [stderr] 
Dec 05 09:03:31.001 INFO [stderr] error[E0658]: procedural macros cannot expand to macro definitions (see issue #54727)
Dec 05 09:03:31.001 INFO [stderr]    --> examples/demo.rs:142:5
Dec 05 09:03:31.001 INFO [stderr]     |
Dec 05 09:03:31.001 INFO [stderr] 142 | /     parser! {
Dec 05 09:03:31.001 INFO [stderr] 143 | |         fn parse_(Token, Span);
Dec 05 09:03:31.001 INFO [stderr] 144 | |
Dec 05 09:03:31.001 INFO [stderr] 145 | |         // combine two spans
Dec 05 09:03:31.001 INFO [stderr] ...   |
Dec 05 09:03:31.001 INFO [stderr] 212 | |         }
Dec 05 09:03:31.001 INFO [stderr] 213 | |     }
Dec 05 09:03:31.001 INFO [stderr]     | |_____^
Dec 05 09:03:31.001 INFO [stderr]     |
Dec 05 09:03:31.001 INFO [stderr]     = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
Dec 05 09:03:31.001 INFO [stderr] 
Dec 05 09:03:31.006 INFO [stderr] error: aborting due to 2 previous errors
Dec 05 09:03:31.006 INFO [stderr] 
Dec 05 09:03:31.006 INFO [stderr] Some errors occurred: E0557, E0658.
Dec 05 09:03:31.006 INFO [stderr] For more information about an error, try `rustc --explain E0557`.
Dec 05 09:03:31.014 INFO [stderr] error: Could not compile `plex`.
Dec 05 09:03:31.014 INFO [stderr] 
Dec 05 09:03:31.014 INFO [stderr] To learn more, run the command again with --verbose.
Dec 05 09:03:31.016 INFO [stderr] su: No module specific data is present
Dec 05 09:03:31.794 INFO running `"docker" "inspect" "f000bf7084b995197277aaa51a83bfa7f0edf9b036955d15c5653a3b7131f80b"`
Dec 05 09:03:31.975 INFO running `"docker" "rm" "-f" "f000bf7084b995197277aaa51a83bfa7f0edf9b036955d15c5653a3b7131f80b"`
Dec 05 09:03:32.323 INFO [stdout] f000bf7084b995197277aaa51a83bfa7f0edf9b036955d15c5653a3b7131f80b