Dec 15 01:54:33.128 INFO testing persistentcache-0.1.6 against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 15 01:54:33.128 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt build --frozen" "-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 15 01:54:33.536 INFO [stdout] eb6c5ff73cc2532a302a64046fa80d0dd9a9826565305ae8590ae5e20c4fd6bb
Dec 15 01:54:33.540 INFO running `"docker" "start" "-a" "eb6c5ff73cc2532a302a64046fa80d0dd9a9826565305ae8590ae5e20c4fd6bb"`
Dec 15 01:54:34.831 INFO [stderr] usermod: no changes
Dec 15 01:54:34.891 INFO [stderr] warning: only one of `license` or `license-file` is necessary
Dec 15 01:54:35.091 INFO [stderr]    Compiling futures-await-quote v0.4.0
Dec 15 01:54:36.427 INFO [stderr]    Compiling futures-await-synom v0.12.0
Dec 15 01:54:39.047 INFO [stderr]    Compiling futures-await-syn v0.12.0
Dec 15 01:54:54.288 INFO [stderr]    Compiling persistentcache_procmacro v0.0.3
Dec 15 01:54:56.907 INFO [stderr]    Compiling persistentcache v0.1.6 (/source)
Dec 15 01:54:57.015 INFO [stderr] error[E0557]: feature has been removed
Dec 15 01:54:57.015 INFO [stderr]    --> src/lib.rs:246:12
Dec 15 01:54:57.015 INFO [stderr]     |
Dec 15 01:54:57.015 INFO [stderr] 246 | #![feature(proc_macro_gen)]
Dec 15 01:54:57.015 INFO [stderr]     |            ^^^^^^^^^^^^^^
Dec 15 01:54:57.015 INFO [stderr]     |
Dec 15 01:54:57.016 INFO [stderr] note: subsumed by `#![feature(proc_macro_hygiene)]`
Dec 15 01:54:57.016 INFO [stderr]    --> src/lib.rs:246:12
Dec 15 01:54:57.016 INFO [stderr]     |
Dec 15 01:54:57.016 INFO [stderr] 246 | #![feature(proc_macro_gen)]
Dec 15 01:54:57.016 INFO [stderr]     |            ^^^^^^^^^^^^^^
Dec 15 01:54:57.016 INFO [stderr] 
Dec 15 01:54:59.235 INFO [stderr] error: aborting due to previous error
Dec 15 01:54:59.235 INFO [stderr] 
Dec 15 01:54:59.235 INFO [stderr] For more information about this error, try `rustc --explain E0557`.
Dec 15 01:54:59.243 INFO [stderr] error: Could not compile `persistentcache`.
Dec 15 01:54:59.243 INFO [stderr] 
Dec 15 01:54:59.243 INFO [stderr] To learn more, run the command again with --verbose.
Dec 15 01:54:59.245 INFO [stderr] su: No module specific data is present
Dec 15 01:54:59.986 INFO running `"docker" "inspect" "eb6c5ff73cc2532a302a64046fa80d0dd9a9826565305ae8590ae5e20c4fd6bb"`
Dec 15 01:55:00.154 INFO running `"docker" "rm" "-f" "eb6c5ff73cc2532a302a64046fa80d0dd9a9826565305ae8590ae5e20c4fd6bb"`
Dec 15 01:55:00.327 INFO [stdout] eb6c5ff73cc2532a302a64046fa80d0dd9a9826565305ae8590ae5e20c4fd6bb