Dec 18 12:57:50.277 INFO checking plex-0.2.3 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 12:57:50.277 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/plex/0.2.3:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 12:57:50.485 INFO [stdout] 2088749d1a4e0174ab6254bc4af2a60d09886c2711b7a19b1e3ca82f72458a97
Dec 18 12:57:50.487 INFO running `"docker" "start" "-a" "2088749d1a4e0174ab6254bc4af2a60d09886c2711b7a19b1e3ca82f72458a97"`
Dec 18 12:57:51.028 INFO [stderr]    Compiling bit-vec v0.4.4
Dec 18 12:57:51.028 INFO [stderr]    Compiling vec_map v0.6.0
Dec 18 12:57:51.040 INFO [stderr]    Compiling lalr v0.0.2
Dec 18 12:57:51.048 INFO [stderr]     Checking proc-macro2 v0.4.24
Dec 18 12:57:51.048 INFO [stderr]     Checking redfa v0.0.2
Dec 18 12:57:51.048 INFO [stderr]    Compiling syn v0.14.9
Dec 18 12:57:53.320 INFO [stderr]    Compiling bit-set v0.4.0
Dec 18 12:57:54.477 INFO [stderr]     Checking quote v0.6.10
Dec 18 12:58:07.112 INFO [stderr]     Checking plex v0.2.3 (/opt/crater/workdir)
Dec 18 12:58:30.374 INFO [stderr] error[E0557]: feature has been removed
Dec 18 12:58:30.374 INFO [stderr]  --> examples/demo.rs:1:12
Dec 18 12:58:30.374 INFO [stderr]   |
Dec 18 12:58:30.374 INFO [stderr] 1 | #![feature(proc_macro_gen)]
Dec 18 12:58:30.374 INFO [stderr]   |            ^^^^^^^^^^^^^^
Dec 18 12:58:30.374 INFO [stderr]   |
Dec 18 12:58:30.374 INFO [stderr] note: subsumed by `#![feature(proc_macro_hygiene)]`
Dec 18 12:58:30.374 INFO [stderr]  --> examples/demo.rs:1:12
Dec 18 12:58:30.374 INFO [stderr]   |
Dec 18 12:58:30.374 INFO [stderr] 1 | #![feature(proc_macro_gen)]
Dec 18 12:58:30.374 INFO [stderr]   |            ^^^^^^^^^^^^^^
Dec 18 12:58:30.374 INFO [stderr] 
Dec 18 12:58:30.880 INFO [stderr] error[E0658]: procedural macros cannot expand to macro definitions (see issue #54727)
Dec 18 12:58:30.880 INFO [stderr]    --> examples/demo.rs:142:5
Dec 18 12:58:30.880 INFO [stderr]     |
Dec 18 12:58:30.880 INFO [stderr] 142 | /     parser! {
Dec 18 12:58:30.880 INFO [stderr] 143 | |         fn parse_(Token, Span);
Dec 18 12:58:30.880 INFO [stderr] 144 | |
Dec 18 12:58:30.880 INFO [stderr] 145 | |         // combine two spans
Dec 18 12:58:30.880 INFO [stderr] ...   |
Dec 18 12:58:30.880 INFO [stderr] 212 | |         }
Dec 18 12:58:30.880 INFO [stderr] 213 | |     }
Dec 18 12:58:30.880 INFO [stderr]     | |_____^
Dec 18 12:58:30.880 INFO [stderr]     |
Dec 18 12:58:30.880 INFO [stderr]     = help: add #![feature(proc_macro_hygiene)] to the crate attributes to enable
Dec 18 12:58:30.880 INFO [stderr] 
Dec 18 12:58:30.880 INFO [stderr] error: aborting due to 2 previous errors
Dec 18 12:58:30.880 INFO [stderr] 
Dec 18 12:58:30.880 INFO [stderr] Some errors occurred: E0557, E0658.
Dec 18 12:58:30.880 INFO [stderr] For more information about an error, try `rustc --explain E0557`.
Dec 18 12:58:30.884 INFO [stderr] error: Could not compile `plex`.
Dec 18 12:58:30.884 INFO [stderr] 
Dec 18 12:58:30.884 INFO [stderr] To learn more, run the command again with --verbose.
Dec 18 12:58:31.880 INFO running `"docker" "inspect" "2088749d1a4e0174ab6254bc4af2a60d09886c2711b7a19b1e3ca82f72458a97"`
Dec 18 12:58:32.166 INFO running `"docker" "rm" "-f" "2088749d1a4e0174ab6254bc4af2a60d09886c2711b7a19b1e3ca82f72458a97"`
Dec 18 12:58:32.500 INFO [stdout] 2088749d1a4e0174ab6254bc4af2a60d09886c2711b7a19b1e3ca82f72458a97