Oct 12 17:35:19.749 INFO checking media-io/timed-text-wasm against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 17:35:19.750 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-5/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-5/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 12 17:35:20.228 INFO blam! 0558466276bdcd77ed990d9517f945803b19154e29e8ec10e21fd1257c04fb7d
Oct 12 17:35:20.240 INFO running `"docker" "start" "-a" "0558466276bdcd77ed990d9517f945803b19154e29e8ec10e21fd1257c04fb7d"`
Oct 12 17:35:21.592 INFO kablam! usermod: no changes
Oct 12 17:35:21.713 INFO kablam!    Compiling proc-macro2 v0.4.12
Oct 12 17:35:21.725 INFO kablam!    Compiling wasm-bindgen-shared v0.2.16
Oct 12 17:35:21.726 INFO kablam!    Compiling log v0.4.3
Oct 12 17:35:21.732 INFO kablam!    Compiling ryu v0.2.3
Oct 12 17:35:21.732 INFO kablam!    Compiling serde v1.0.71
Oct 12 17:35:27.250 INFO kablam! error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Oct 12 17:35:27.250 INFO kablam!    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Oct 12 17:35:27.250 INFO kablam!     |
Oct 12 17:35:27.250 INFO kablam! 346 |             Span::Nightly(proc_macro::Span::def_site())
Oct 12 17:35:27.250 INFO kablam!     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 12 17:35:27.250 INFO kablam!     |
Oct 12 17:35:27.250 INFO kablam!     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Oct 12 17:35:27.250 INFO kablam! 
Oct 12 17:35:27.273 INFO kablam! error: aborting due to previous error
Oct 12 17:35:27.273 INFO kablam! 
Oct 12 17:35:27.273 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Oct 12 17:35:27.285 INFO kablam! error: Could not compile `proc-macro2`.
Oct 12 17:35:27.285 INFO kablam! warning: build failed, waiting for other jobs to finish...
Oct 12 17:35:36.852 INFO kablam! error: build failed
Oct 12 17:35:36.852 INFO kablam! su: No module specific data is present
Oct 12 17:35:37.202 INFO running `"docker" "rm" "-f" "0558466276bdcd77ed990d9517f945803b19154e29e8ec10e21fd1257c04fb7d"`
Oct 12 17:35:37.533 INFO blam! 0558466276bdcd77ed990d9517f945803b19154e29e8ec10e21fd1257c04fb7d