Dec 19 15:15:44.374 INFO checking jeremyBanks/tprime against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 15:15:44.374 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/jeremyBanks/tprime:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 15:15:44.998 INFO [stdout] 6419c2815cc22eb76b9f645c83b2a9aac4757a816018bc3ec2ed5e10d8015620
Dec 19 15:15:45.000 INFO running `"docker" "start" "-a" "6419c2815cc22eb76b9f645c83b2a9aac4757a816018bc3ec2ed5e10d8015620"`
Dec 19 15:15:47.567 INFO [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
Dec 19 15:15:47.737 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.15
Dec 19 15:15:47.750 INFO [stderr]     Checking web-sys v0.0.1
Dec 19 15:15:47.751 INFO [stderr]    Compiling proc-macro2 v0.4.9
Dec 19 15:15:47.759 INFO [stderr]    Compiling serdebug v1.0.5
Dec 19 15:15:49.696 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 19 15:15:49.696 INFO [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.9/src/unstable.rs:347:27
Dec 19 15:15:49.696 INFO [stderr]     |
Dec 19 15:15:49.696 INFO [stderr] 347 |             Span::Nightly(proc_macro::Span::def_site())
Dec 19 15:15:49.696 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 15:15:49.697 INFO [stderr]     |
Dec 19 15:15:49.697 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 19 15:15:49.697 INFO [stderr] 
Dec 19 15:15:49.748 INFO [stderr] error: aborting due to previous error
Dec 19 15:15:49.748 INFO [stderr] 
Dec 19 15:15:49.748 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 19 15:15:49.778 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 19 15:15:49.778 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 19 15:15:49.794 INFO [stderr] error: build failed
Dec 19 15:15:50.924 INFO running `"docker" "inspect" "6419c2815cc22eb76b9f645c83b2a9aac4757a816018bc3ec2ed5e10d8015620"`
Dec 19 15:15:51.232 INFO running `"docker" "rm" "-f" "6419c2815cc22eb76b9f645c83b2a9aac4757a816018bc3ec2ed5e10d8015620"`
Dec 19 15:15:51.596 INFO [stdout] 6419c2815cc22eb76b9f645c83b2a9aac4757a816018bc3ec2ed5e10d8015620