Dec 18 08:06:51.308 INFO checking ColbyCypherSociety/ChatDemo against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 08:06:51.308 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/ColbyCypherSociety/ChatDemo:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 08:06:51.622 INFO [stdout] 5a0e5c186a70a6a2411314ceb609ef7c7d9f8176a92ee26aae56441879be0691
Dec 18 08:06:51.625 INFO running `"docker" "start" "-a" "5a0e5c186a70a6a2411314ceb609ef7c7d9f8176a92ee26aae56441879be0691"`
Dec 18 08:06:52.560 INFO [stderr]    Compiling proc-macro2 v0.4.13
Dec 18 08:06:52.560 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.17
Dec 18 08:06:52.572 INFO [stderr]    Compiling num-bigint v0.2.0
Dec 18 08:06:52.576 INFO [stderr]    Compiling serde_json v1.0.26
Dec 18 08:06:54.448 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 18 08:06:54.448 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.13/src/unstable.rs:359:27
Dec 18 08:06:54.448 INFO [stderr]     |
Dec 18 08:06:54.448 INFO [stderr] 359 |             Span::Nightly(proc_macro::Span::def_site())
Dec 18 08:06:54.448 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:06:54.448 INFO [stderr]     |
Dec 18 08:06:54.448 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 18 08:06:54.448 INFO [stderr] 
Dec 18 08:06:54.472 INFO [stderr] error: aborting due to previous error
Dec 18 08:06:54.472 INFO [stderr] 
Dec 18 08:06:54.472 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 18 08:06:54.476 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 18 08:06:54.476 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 18 08:06:56.906 INFO [stderr] error: build failed
Dec 18 08:06:57.206 INFO running `"docker" "inspect" "5a0e5c186a70a6a2411314ceb609ef7c7d9f8176a92ee26aae56441879be0691"`
Dec 18 08:06:57.288 INFO running `"docker" "rm" "-f" "5a0e5c186a70a6a2411314ceb609ef7c7d9f8176a92ee26aae56441879be0691"`
Dec 18 08:06:57.396 INFO [stdout] 5a0e5c186a70a6a2411314ceb609ef7c7d9f8176a92ee26aae56441879be0691