Oct 13 04:53:08.745 INFO checking EmmaRamirez/rust-and-webassembly-talk against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 04:53:08.745 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-2/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-2/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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"`
Oct 13 04:53:09.204 INFO blam! 59a312e2631d683ea9d80cee0b36d724ae13603be2bfeaee90cea5967217020f
Oct 13 04:53:09.208 INFO running `"docker" "start" "-a" "59a312e2631d683ea9d80cee0b36d724ae13603be2bfeaee90cea5967217020f"`
Oct 13 04:53:11.020 INFO kablam! usermod: no changes
Oct 13 04:53:11.117 INFO kablam!    Compiling proc-macro2 v0.4.12
Oct 13 04:53:11.117 INFO kablam!    Compiling wasm-bindgen-shared v0.2.16
Oct 13 04:53:11.117 INFO kablam!    Compiling ryu v0.2.3
Oct 13 04:53:11.117 INFO kablam!    Compiling serde v1.0.71
Oct 13 04:53:19.224 INFO kablam! error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Oct 13 04:53:19.225 INFO kablam!    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Oct 13 04:53:19.225 INFO kablam!     |
Oct 13 04:53:19.226 INFO kablam! 346 |             Span::Nightly(proc_macro::Span::def_site())
Oct 13 04:53:19.226 INFO kablam!     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 13 04:53:19.226 INFO kablam!     |
Oct 13 04:53:19.226 INFO kablam!     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Oct 13 04:53:19.226 INFO kablam! 
Oct 13 04:53:19.256 INFO kablam! error: aborting due to previous error
Oct 13 04:53:19.257 INFO kablam! 
Oct 13 04:53:19.258 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Oct 13 04:53:19.273 INFO kablam! error: Could not compile `proc-macro2`.
Oct 13 04:53:19.274 INFO kablam! warning: build failed, waiting for other jobs to finish...
Oct 13 04:53:27.563 INFO kablam! error: build failed
Oct 13 04:53:27.565 INFO kablam! su: No module specific data is present
Oct 13 04:53:28.794 INFO running `"docker" "rm" "-f" "59a312e2631d683ea9d80cee0b36d724ae13603be2bfeaee90cea5967217020f"`
Oct 13 04:53:29.088 INFO blam! 59a312e2631d683ea9d80cee0b36d724ae13603be2bfeaee90cea5967217020f