Dec 18 04:16:17.466 INFO checking alexandermccormick/wasm-conways-game-of-life against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 04:16:17.466 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/alexandermccormick/wasm-conways-game-of-life:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 04:16:17.697 INFO [stdout] 02b6b3b8ebc6198bb7a6bdc2296a1de5ad8f980f69e979f4edda59541cca455f
Dec 18 04:16:17.699 INFO running `"docker" "start" "-a" "02b6b3b8ebc6198bb7a6bdc2296a1de5ad8f980f69e979f4edda59541cca455f"`
Dec 18 04:16:18.301 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.17
Dec 18 04:16:18.304 INFO [stderr]    Compiling proc-macro2 v0.4.9
Dec 18 04:16:18.962 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 18 04:16:18.962 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.9/src/unstable.rs:347:27
Dec 18 04:16:18.963 INFO [stderr]     |
Dec 18 04:16:18.963 INFO [stderr] 347 |             Span::Nightly(proc_macro::Span::def_site())
Dec 18 04:16:18.963 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 04:16:18.964 INFO [stderr]     |
Dec 18 04:16:18.964 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 18 04:16:18.964 INFO [stderr] 
Dec 18 04:16:18.980 INFO [stderr] error: aborting due to previous error
Dec 18 04:16:18.980 INFO [stderr] 
Dec 18 04:16:18.980 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 18 04:16:18.990 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 18 04:16:18.991 INFO [stderr] 
Dec 18 04:16:18.991 INFO [stderr] To learn more, run the command again with --verbose.
Dec 18 04:16:19.307 INFO running `"docker" "inspect" "02b6b3b8ebc6198bb7a6bdc2296a1de5ad8f980f69e979f4edda59541cca455f"`
Dec 18 04:16:19.430 INFO running `"docker" "rm" "-f" "02b6b3b8ebc6198bb7a6bdc2296a1de5ad8f980f69e979f4edda59541cca455f"`
Dec 18 04:16:19.542 INFO [stdout] 02b6b3b8ebc6198bb7a6bdc2296a1de5ad8f980f69e979f4edda59541cca455f