Dec 14 11:16:44.949 INFO testing ColbyCypherSociety/ChatDemo against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 14 11:16:44.949 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-7/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 14 11:16:45.474 INFO [stdout] 026519d58a2e23f51ed0d75b1bfde14cf47edbd981d9a87dcba67a3bb373ab4e
Dec 14 11:16:45.475 INFO running `"docker" "start" "-a" "026519d58a2e23f51ed0d75b1bfde14cf47edbd981d9a87dcba67a3bb373ab4e"`
Dec 14 11:16:46.507 INFO [stderr] usermod: no changes
Dec 14 11:16:46.743 INFO [stderr]    Compiling num-bigint v0.2.0
Dec 14 11:16:46.747 INFO [stderr]    Compiling proc-macro2 v0.4.13
Dec 14 11:16:47.855 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 14 11:16:47.855 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.13/src/unstable.rs:359:27
Dec 14 11:16:47.855 INFO [stderr]     |
Dec 14 11:16:47.855 INFO [stderr] 359 |             Span::Nightly(proc_macro::Span::def_site())
Dec 14 11:16:47.855 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 11:16:47.855 INFO [stderr]     |
Dec 14 11:16:47.855 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 14 11:16:47.855 INFO [stderr] 
Dec 14 11:16:47.872 INFO [stderr] error: aborting due to previous error
Dec 14 11:16:47.872 INFO [stderr] 
Dec 14 11:16:47.872 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 14 11:16:47.885 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 14 11:16:47.885 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 14 11:16:48.016 INFO [stderr] error: build failed
Dec 14 11:16:48.022 INFO [stderr] su: No module specific data is present
Dec 14 11:16:48.440 INFO running `"docker" "inspect" "026519d58a2e23f51ed0d75b1bfde14cf47edbd981d9a87dcba67a3bb373ab4e"`
Dec 14 11:16:48.649 INFO running `"docker" "rm" "-f" "026519d58a2e23f51ed0d75b1bfde14cf47edbd981d9a87dcba67a3bb373ab4e"`
Dec 14 11:16:48.886 INFO [stdout] 026519d58a2e23f51ed0d75b1bfde14cf47edbd981d9a87dcba67a3bb373ab4e