Nov 04 13:57:11.803 INFO checking EmmaRamirez/rust-and-webassembly-talk against try#e740b9aa0b624fa39feb39613e76d15bdf57e594 for pr-55655
Nov 04 13:57:11.803 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55655/worker-4/try#e740b9aa0b624fa39feb39613e76d15bdf57e594:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55655/try#e740b9aa0b624fa39feb39613e76d15bdf57e594:/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 +e740b9aa0b624fa39feb39613e76d15bdf57e594-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"`
Nov 04 13:57:12.321 INFO blam! ef6c5d2dc62d8b0290e61dd6c4f79707cbbdd884f061c51e2e5b10503c10a38d
Nov 04 13:57:12.322 INFO running `"docker" "start" "-a" "ef6c5d2dc62d8b0290e61dd6c4f79707cbbdd884f061c51e2e5b10503c10a38d"`
Nov 04 13:57:15.076 INFO kablam! usermod: no changes
Nov 04 13:57:15.186 INFO kablam!    Compiling proc-macro2 v0.4.12
Nov 04 13:57:15.191 INFO kablam!    Compiling wasm-bindgen-shared v0.2.16
Nov 04 13:57:15.200 INFO kablam!    Compiling log v0.4.3
Nov 04 13:57:20.527 INFO kablam! error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Nov 04 13:57:20.527 INFO kablam!    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Nov 04 13:57:20.527 INFO kablam!     |
Nov 04 13:57:20.527 INFO kablam! 346 |             Span::Nightly(proc_macro::Span::def_site())
Nov 04 13:57:20.527 INFO kablam!     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 04 13:57:20.527 INFO kablam!     |
Nov 04 13:57:20.527 INFO kablam!     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Nov 04 13:57:20.527 INFO kablam! 
Nov 04 13:57:20.551 INFO kablam! error: aborting due to previous error
Nov 04 13:57:20.551 INFO kablam! 
Nov 04 13:57:20.551 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Nov 04 13:57:20.558 INFO kablam! error: Could not compile `proc-macro2`.
Nov 04 13:57:20.558 INFO kablam! 
Nov 04 13:57:20.558 INFO kablam! To learn more, run the command again with --verbose.
Nov 04 13:57:20.559 INFO kablam! su: No module specific data is present
Nov 04 13:57:21.860 INFO running `"docker" "rm" "-f" "ef6c5d2dc62d8b0290e61dd6c4f79707cbbdd884f061c51e2e5b10503c10a38d"`
Nov 04 13:57:22.195 INFO blam! ef6c5d2dc62d8b0290e61dd6c4f79707cbbdd884f061c51e2e5b10503c10a38d