Nov 29 22:40:46.100 INFO checking mattdeboard/prepend_line against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Nov 29 22:40:46.100 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-6/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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"`
Nov 29 22:40:46.584 INFO [stdout] 1eaa170a5dfc616c332df54a132ccfaaaa56f4cd7d99b7eb60ea16b6d3d02a85
Nov 29 22:40:46.588 INFO running `"docker" "start" "-a" "1eaa170a5dfc616c332df54a132ccfaaaa56f4cd7d99b7eb60ea16b6d3d02a85"`
Nov 29 22:40:47.792 INFO [stderr] usermod: no changes
Nov 29 22:40:47.993 INFO [stderr]    Compiling proc-macro2 v0.4.12
Nov 29 22:40:47.993 INFO [stderr]    Compiling ryu v0.2.3
Nov 29 22:40:47.993 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.16
Nov 29 22:40:48.012 INFO [stderr]    Compiling log v0.4.3
Nov 29 22:40:48.012 INFO [stderr]    Compiling serde v1.0.71
Nov 29 22:40:48.012 INFO [stderr]     Checking uuid v0.1.18
Nov 29 22:40:49.999 INFO [stderr]     Checking mktemp v0.3.1
Nov 29 22:40:54.574 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Nov 29 22:40:54.574 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Nov 29 22:40:54.574 INFO [stderr]     |
Nov 29 22:40:54.574 INFO [stderr] 346 |             Span::Nightly(proc_macro::Span::def_site())
Nov 29 22:40:54.574 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 29 22:40:54.574 INFO [stderr]     |
Nov 29 22:40:54.574 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Nov 29 22:40:54.574 INFO [stderr] 
Nov 29 22:40:54.622 INFO [stderr] error: aborting due to previous error
Nov 29 22:40:54.622 INFO [stderr] 
Nov 29 22:40:54.622 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Nov 29 22:40:54.647 INFO [stderr] error: Could not compile `proc-macro2`.
Nov 29 22:40:54.647 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Nov 29 22:41:03.599 INFO [stderr] error: build failed
Nov 29 22:41:03.602 INFO [stderr] su: No module specific data is present
Nov 29 22:41:04.348 INFO running `"docker" "inspect" "1eaa170a5dfc616c332df54a132ccfaaaa56f4cd7d99b7eb60ea16b6d3d02a85"`
Nov 29 22:41:04.627 INFO running `"docker" "rm" "-f" "1eaa170a5dfc616c332df54a132ccfaaaa56f4cd7d99b7eb60ea16b6d3d02a85"`
Nov 29 22:41:04.908 INFO [stdout] 1eaa170a5dfc616c332df54a132ccfaaaa56f4cd7d99b7eb60ea16b6d3d02a85