Dec 05 02:40:53.376 INFO checking EmmaRamirez/rust-and-webassembly-talk against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 02:40:53.376 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 02:40:53.926 INFO [stdout] 4289c0bb6174629d70ddddd7e80b2f5b5c5ab0147295dbac34b052219baa8072
Dec 05 02:40:53.928 INFO running `"docker" "start" "-a" "4289c0bb6174629d70ddddd7e80b2f5b5c5ab0147295dbac34b052219baa8072"`
Dec 05 02:40:56.373 INFO [stderr] usermod: no changes
Dec 05 02:40:56.563 INFO [stderr]    Compiling proc-macro2 v0.4.12
Dec 05 02:40:56.563 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.16
Dec 05 02:40:56.563 INFO [stderr]    Compiling log v0.4.3
Dec 05 02:40:56.563 INFO [stderr]    Compiling ryu v0.2.3
Dec 05 02:40:58.604 INFO [stderr]    Compiling serde_json v1.0.26
Dec 05 02:41:01.868 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 05 02:41:01.868 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Dec 05 02:41:01.868 INFO [stderr]     |
Dec 05 02:41:01.868 INFO [stderr] 346 |             Span::Nightly(proc_macro::Span::def_site())
Dec 05 02:41:01.868 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 02:41:01.869 INFO [stderr]     |
Dec 05 02:41:01.869 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 05 02:41:01.870 INFO [stderr] 
Dec 05 02:41:01.887 INFO [stderr] error: aborting due to previous error
Dec 05 02:41:01.887 INFO [stderr] 
Dec 05 02:41:01.891 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 05 02:41:01.898 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 05 02:41:01.902 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 05 02:41:04.675 INFO [stderr] error: build failed
Dec 05 02:41:04.675 INFO [stderr] su: No module specific data is present
Dec 05 02:41:06.078 INFO running `"docker" "inspect" "4289c0bb6174629d70ddddd7e80b2f5b5c5ab0147295dbac34b052219baa8072"`
Dec 05 02:41:06.443 INFO running `"docker" "rm" "-f" "4289c0bb6174629d70ddddd7e80b2f5b5c5ab0147295dbac34b052219baa8072"`
Dec 05 02:41:06.823 INFO [stdout] 4289c0bb6174629d70ddddd7e80b2f5b5c5ab0147295dbac34b052219baa8072