Dec 05 03:00:16.869 INFO checking ColbyCypherSociety/ChatDemo against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 03:00:16.869 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-6/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 03:00:17.305 INFO [stdout] d4cae949372ef6d3855c858f6cd71352160ca9e5b09ca2253ad34c7c031e4d6d
Dec 05 03:00:17.315 INFO running `"docker" "start" "-a" "d4cae949372ef6d3855c858f6cd71352160ca9e5b09ca2253ad34c7c031e4d6d"`
Dec 05 03:00:18.255 INFO [stderr] usermod: no changes
Dec 05 03:00:18.479 INFO [stderr]    Compiling proc-macro2 v0.4.13
Dec 05 03:00:18.485 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.17
Dec 05 03:00:18.495 INFO [stderr]    Compiling ryu v0.2.4
Dec 05 03:00:18.495 INFO [stderr]     Checking num-bigint v0.2.0
Dec 05 03:00:18.495 INFO [stderr]     Checking num-iter v0.1.37
Dec 05 03:00:20.247 INFO [stderr]    Compiling serde_json v1.0.26
Dec 05 03:00:21.711 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 05 03:00:21.711 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.13/src/unstable.rs:359:27
Dec 05 03:00:21.711 INFO [stderr]     |
Dec 05 03:00:21.711 INFO [stderr] 359 |             Span::Nightly(proc_macro::Span::def_site())
Dec 05 03:00:21.711 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 03:00:21.711 INFO [stderr]     |
Dec 05 03:00:21.711 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 05 03:00:21.711 INFO [stderr] 
Dec 05 03:00:21.731 INFO [stderr] error: aborting due to previous error
Dec 05 03:00:21.731 INFO [stderr] 
Dec 05 03:00:21.731 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 05 03:00:21.733 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 05 03:00:21.733 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 05 03:00:24.780 INFO [stderr] error: build failed
Dec 05 03:00:24.780 INFO [stderr] su: No module specific data is present
Dec 05 03:00:25.192 INFO running `"docker" "inspect" "d4cae949372ef6d3855c858f6cd71352160ca9e5b09ca2253ad34c7c031e4d6d"`
Dec 05 03:00:25.321 INFO running `"docker" "rm" "-f" "d4cae949372ef6d3855c858f6cd71352160ca9e5b09ca2253ad34c7c031e4d6d"`
Dec 05 03:00:25.519 INFO [stdout] d4cae949372ef6d3855c858f6cd71352160ca9e5b09ca2253ad34c7c031e4d6d