Dec 12 03:23:27.742 INFO checking ColbyCypherSociety/ChatDemo against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 03:23:27.742 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 12 03:23:28.380 INFO [stdout] 33ae08944c28f7e7e1f120dc7241778a4a3124e36ddd98cb95c6a3db13abd238
Dec 12 03:23:28.384 INFO running `"docker" "start" "-a" "33ae08944c28f7e7e1f120dc7241778a4a3124e36ddd98cb95c6a3db13abd238"`
Dec 12 03:23:29.682 INFO [stderr] usermod: no changes
Dec 12 03:23:29.904 INFO [stderr]    Compiling num-bigint v0.2.0
Dec 12 03:23:29.904 INFO [stderr]    Compiling proc-macro2 v0.4.13
Dec 12 03:23:29.908 INFO [stderr]    Compiling serde_json v1.0.26
Dec 12 03:23:31.700 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 12 03:23:31.700 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.13/src/unstable.rs:359:27
Dec 12 03:23:31.700 INFO [stderr]     |
Dec 12 03:23:31.700 INFO [stderr] 359 |             Span::Nightly(proc_macro::Span::def_site())
Dec 12 03:23:31.700 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 03:23:31.700 INFO [stderr]     |
Dec 12 03:23:31.700 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 12 03:23:31.700 INFO [stderr] 
Dec 12 03:23:31.809 INFO [stderr] error: aborting due to previous error
Dec 12 03:23:31.809 INFO [stderr] 
Dec 12 03:23:31.809 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 12 03:23:31.832 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 12 03:23:31.832 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 12 03:23:35.219 INFO [stderr] error: build failed
Dec 12 03:23:35.225 INFO [stderr] su: No module specific data is present
Dec 12 03:23:35.850 INFO running `"docker" "inspect" "33ae08944c28f7e7e1f120dc7241778a4a3124e36ddd98cb95c6a3db13abd238"`
Dec 12 03:23:36.053 INFO running `"docker" "rm" "-f" "33ae08944c28f7e7e1f120dc7241778a4a3124e36ddd98cb95c6a3db13abd238"`
Dec 12 03:23:36.130 INFO [stdout] 33ae08944c28f7e7e1f120dc7241778a4a3124e36ddd98cb95c6a3db13abd238