Dec 11 14:00:10.357 INFO checking mattdeboard/prepend_line against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 14:00:10.357 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-3/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 11 14:00:10.856 INFO [stdout] a46e49438c09811299efe637fee375cd8908a09263242b06543244280d414ddf
Dec 11 14:00:10.862 INFO running `"docker" "start" "-a" "a46e49438c09811299efe637fee375cd8908a09263242b06543244280d414ddf"`
Dec 11 14:00:11.563 INFO [stderr] usermod: no changes
Dec 11 14:00:11.722 INFO [stderr]    Compiling proc-macro2 v0.4.12
Dec 11 14:00:11.722 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.16
Dec 11 14:00:11.722 INFO [stderr]    Compiling log v0.4.3
Dec 11 14:00:11.722 INFO [stderr]    Compiling serde v1.0.71
Dec 11 14:00:11.722 INFO [stderr]    Compiling ryu v0.2.3
Dec 11 14:00:11.722 INFO [stderr]     Checking uuid v0.1.18
Dec 11 14:00:13.228 INFO [stderr]     Checking mktemp v0.3.1
Dec 11 14:00:14.504 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Dec 11 14:00:14.504 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Dec 11 14:00:14.504 INFO [stderr]     |
Dec 11 14:00:14.504 INFO [stderr] 346 |             Span::Nightly(proc_macro::Span::def_site())
Dec 11 14:00:14.504 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 14:00:14.504 INFO [stderr]     |
Dec 11 14:00:14.504 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Dec 11 14:00:14.504 INFO [stderr] 
Dec 11 14:00:14.520 INFO [stderr] error: aborting due to previous error
Dec 11 14:00:14.520 INFO [stderr] 
Dec 11 14:00:14.520 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 11 14:00:14.528 INFO [stderr] error: Could not compile `proc-macro2`.
Dec 11 14:00:14.528 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 11 14:00:24.128 INFO [stderr] error: build failed
Dec 11 14:00:24.128 INFO [stderr] su: No module specific data is present
Dec 11 14:00:24.838 INFO running `"docker" "inspect" "a46e49438c09811299efe637fee375cd8908a09263242b06543244280d414ddf"`
Dec 11 14:00:25.111 INFO running `"docker" "rm" "-f" "a46e49438c09811299efe637fee375cd8908a09263242b06543244280d414ddf"`
Dec 11 14:00:25.361 INFO [stdout] a46e49438c09811299efe637fee375cd8908a09263242b06543244280d414ddf