Dec 06 14:17:22.476 INFO testing EmmaRamirez/rust-and-webassembly-talk against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 06 14:17:22.476 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-7/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/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 +906deae0790bd18681b937fe9a141a3c26cf1855-alt build --frozen" "-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 06 14:17:23.169 INFO [stdout] bbc8015a485c5211bfd8f88ef28ff176f9a1d76d4bc5e33d9b0b8f83bc9a0c93
Dec 06 14:17:23.171 INFO running `"docker" "start" "-a" "bbc8015a485c5211bfd8f88ef28ff176f9a1d76d4bc5e33d9b0b8f83bc9a0c93"`
Dec 06 14:17:25.303 INFO [stderr] usermod: no changes
Dec 06 14:17:25.464 INFO [stderr]    Compiling proc-macro2 v0.4.12
Dec 06 14:17:25.464 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.16
Dec 06 14:17:27.996 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 06 14:17:27.996 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Dec 06 14:17:27.996 INFO [stderr]     |
Dec 06 14:17:27.996 INFO [stderr] 346 |             Span::Nightly(proc_macro::Span::def_site())
Dec 06 14:17:27.996 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 14:17:27.996 INFO [stderr]     |
Dec 06 14:17:27.996 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 06 14:17:27.996 INFO [stderr] 
Dec 06 14:17:28.020 INFO [stderr] error: aborting due to previous error
Dec 06 14:17:28.020 INFO [stderr] 
Dec 06 14:17:28.020 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 06 14:17:28.040 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 06 14:17:28.040 INFO [stderr] 
Dec 06 14:17:28.040 INFO [stderr] To learn more, run the command again with --verbose.
Dec 06 14:17:28.048 INFO [stderr] su: No module specific data is present
Dec 06 14:17:29.296 INFO running `"docker" "inspect" "bbc8015a485c5211bfd8f88ef28ff176f9a1d76d4bc5e33d9b0b8f83bc9a0c93"`
Dec 06 14:17:29.680 INFO running `"docker" "rm" "-f" "bbc8015a485c5211bfd8f88ef28ff176f9a1d76d4bc5e33d9b0b8f83bc9a0c93"`
Dec 06 14:17:30.040 INFO [stdout] bbc8015a485c5211bfd8f88ef28ff176f9a1d76d4bc5e33d9b0b8f83bc9a0c93