Dec 18 07:49:00.461 INFO checking EmmaRamirez/rust-and-webassembly-talk against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 07:49:00.461 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/EmmaRamirez/rust-and-webassembly-talk:/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 07:49:00.991 INFO [stdout] ca6ecd70b3a78e7cf28c661d3ddda3d856d9f4bada5b61f95c069e79eec4ea66
Dec 18 07:49:00.993 INFO running `"docker" "start" "-a" "ca6ecd70b3a78e7cf28c661d3ddda3d856d9f4bada5b61f95c069e79eec4ea66"`
Dec 18 07:49:03.163 INFO [stderr]    Compiling proc-macro2 v0.4.12
Dec 18 07:49:03.163 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.16
Dec 18 07:49:03.169 INFO [stderr]    Compiling log v0.4.3
Dec 18 07:49:03.176 INFO [stderr]    Compiling ryu v0.2.3
Dec 18 07:49:04.572 INFO [stderr]    Compiling serde_json v1.0.26
Dec 18 07:49:06.999 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 18 07:49:07.000 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Dec 18 07:49:07.000 INFO [stderr]     |
Dec 18 07:49:07.000 INFO [stderr] 346 |             Span::Nightly(proc_macro::Span::def_site())
Dec 18 07:49:07.000 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 07:49:07.001 INFO [stderr]     |
Dec 18 07:49:07.001 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 18 07:49:07.001 INFO [stderr] 
Dec 18 07:49:07.019 INFO [stderr] error: aborting due to previous error
Dec 18 07:49:07.019 INFO [stderr] 
Dec 18 07:49:07.020 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 18 07:49:07.057 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 18 07:49:07.057 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 18 07:49:10.650 INFO [stderr] error: build failed
Dec 18 07:49:11.716 INFO running `"docker" "inspect" "ca6ecd70b3a78e7cf28c661d3ddda3d856d9f4bada5b61f95c069e79eec4ea66"`
Dec 18 07:49:11.924 INFO running `"docker" "rm" "-f" "ca6ecd70b3a78e7cf28c661d3ddda3d856d9f4bada5b61f95c069e79eec4ea66"`
Dec 18 07:49:12.264 INFO [stdout] ca6ecd70b3a78e7cf28c661d3ddda3d856d9f4bada5b61f95c069e79eec4ea66