[INFO] updating cached repository alexandermccormick/wasm-conways-game-of-life
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alexandermccormick/wasm-conways-game-of-life
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alexandermccormick/wasm-conways-game-of-life" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/alexandermccormick/wasm-conways-game-of-life"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/alexandermccormick/wasm-conways-game-of-life'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alexandermccormick/wasm-conways-game-of-life" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/alexandermccormick/wasm-conways-game-of-life"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/alexandermccormick/wasm-conways-game-of-life'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 265545a7b4f18624ee90dcca7dceda8f98149c64
[INFO] sha for GitHub repo alexandermccormick/wasm-conways-game-of-life: 265545a7b4f18624ee90dcca7dceda8f98149c64
[INFO] validating manifest of alexandermccormick/wasm-conways-game-of-life on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of alexandermccormick/wasm-conways-game-of-life on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing alexandermccormick/wasm-conways-game-of-life
[INFO] finished frobbing alexandermccormick/wasm-conways-game-of-life
[INFO] frobbed toml for alexandermccormick/wasm-conways-game-of-life written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/alexandermccormick/wasm-conways-game-of-life/Cargo.toml
[INFO] started frobbing alexandermccormick/wasm-conways-game-of-life
[INFO] finished frobbing alexandermccormick/wasm-conways-game-of-life
[INFO] frobbed toml for alexandermccormick/wasm-conways-game-of-life written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/alexandermccormick/wasm-conways-game-of-life/Cargo.toml
[INFO] crate alexandermccormick/wasm-conways-game-of-life has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking alexandermccormick/wasm-conways-game-of-life against try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-1/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/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" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c2660b3b95745b5f433731c5f91b28a1584e0d222ab9b3b253e13e2bf21795bb
[INFO] running `"docker" "start" "-a" "c2660b3b95745b5f433731c5f91b28a1584e0d222ab9b3b253e13e2bf21795bb"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.9/src/unstable.rs:347:27
[INFO] [stderr]     |
[INFO] [stderr] 347 |             Span::Nightly(proc_macro::Span::def_site())
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `proc-macro2`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "c2660b3b95745b5f433731c5f91b28a1584e0d222ab9b3b253e13e2bf21795bb"`
[INFO] running `"docker" "rm" "-f" "c2660b3b95745b5f433731c5f91b28a1584e0d222ab9b3b253e13e2bf21795bb"`
[INFO] [stdout] c2660b3b95745b5f433731c5f91b28a1584e0d222ab9b3b253e13e2bf21795bb