Dec 05 02:40:42.623 INFO checking EmmaRamirez/rust-and-webassembly-talk against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 02:40:42.623 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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"`
Dec 05 02:40:43.185 INFO [stdout] b410184959ee522b32b27fda9033271cb741fddb5f239bca4326b145fe5cbfb4
Dec 05 02:40:43.187 INFO running `"docker" "start" "-a" "b410184959ee522b32b27fda9033271cb741fddb5f239bca4326b145fe5cbfb4"`
Dec 05 02:40:45.755 INFO [stderr] usermod: no changes
Dec 05 02:40:45.968 INFO [stderr]    Compiling proc-macro2 v0.4.12
Dec 05 02:40:45.971 INFO [stderr]    Compiling serde_json v1.0.26
Dec 05 02:40:47.559 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 05 02:40:47.559 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Dec 05 02:40:47.559 INFO [stderr]     |
Dec 05 02:40:47.559 INFO [stderr] 346 |             Span::Nightly(proc_macro::Span::def_site())
Dec 05 02:40:47.559 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 02:40:47.559 INFO [stderr]     |
Dec 05 02:40:47.559 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 05 02:40:47.559 INFO [stderr] 
Dec 05 02:40:47.589 INFO [stderr] error: aborting due to previous error
Dec 05 02:40:47.589 INFO [stderr] 
Dec 05 02:40:47.589 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 05 02:40:47.602 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 05 02:40:47.603 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 05 02:40:51.258 INFO [stderr] error: build failed
Dec 05 02:40:51.259 INFO [stderr] su: No module specific data is present
Dec 05 02:40:52.555 INFO running `"docker" "inspect" "b410184959ee522b32b27fda9033271cb741fddb5f239bca4326b145fe5cbfb4"`
Dec 05 02:40:52.939 INFO running `"docker" "rm" "-f" "b410184959ee522b32b27fda9033271cb741fddb5f239bca4326b145fe5cbfb4"`
Dec 05 02:40:53.291 INFO [stdout] b410184959ee522b32b27fda9033271cb741fddb5f239bca4326b145fe5cbfb4