Nov 27 17:48:28.176 INFO documenting mattdeboard/prepend_line against try#f5a0bd723553ea4b7556bd7087b9f0919cafb483 for pr-55318
Nov 27 17:48:28.176 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55318/worker-5/try#f5a0bd723553ea4b7556bd7087b9f0919cafb483:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-55318/try#f5a0bd723553ea4b7556bd7087b9f0919cafb483:/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 +f5a0bd723553ea4b7556bd7087b9f0919cafb483-alt doc --frozen --no-deps --document-private-items" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 27 17:48:28.593 INFO [stdout] b9d04ad175cadd17d907e6c2bdcee7ccc00d4a6dc0ef30ff527ecb8aa9211b71
Nov 27 17:48:28.597 INFO running `"docker" "start" "-a" "b9d04ad175cadd17d907e6c2bdcee7ccc00d4a6dc0ef30ff527ecb8aa9211b71"`
Nov 27 17:48:29.710 INFO [stderr] usermod: no changes
Nov 27 17:48:29.949 INFO [stderr]    Compiling proc-macro2 v0.4.12
Nov 27 17:48:29.950 INFO [stderr]    Compiling wasm-bindgen-shared v0.2.16
Nov 27 17:48:29.951 INFO [stderr]    Compiling log v0.4.3
Nov 27 17:48:29.952 INFO [stderr]    Compiling ryu v0.2.3
Nov 27 17:48:29.959 INFO [stderr]     Checking uuid v0.1.18
Nov 27 17:48:31.820 INFO [stderr]    Compiling serde_json v1.0.26
Nov 27 17:48:32.493 INFO [stderr]     Checking mktemp v0.3.1
Nov 27 17:48:35.135 INFO [stderr] error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Nov 27 17:48:35.135 INFO [stderr]    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Nov 27 17:48:35.135 INFO [stderr]     |
Nov 27 17:48:35.135 INFO [stderr] 346 |             Span::Nightly(proc_macro::Span::def_site())
Nov 27 17:48:35.135 INFO [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 27 17:48:35.135 INFO [stderr]     |
Nov 27 17:48:35.135 INFO [stderr]     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Nov 27 17:48:35.135 INFO [stderr] 
Nov 27 17:48:35.163 INFO [stderr] error: aborting due to previous error
Nov 27 17:48:35.163 INFO [stderr] 
Nov 27 17:48:35.163 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Nov 27 17:48:35.175 INFO [stderr] error: Could not compile `proc-macro2`.
Nov 27 17:48:35.175 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Nov 27 17:48:38.059 INFO [stderr] error: build failed
Nov 27 17:48:38.071 INFO [stderr] su: No module specific data is present
Nov 27 17:48:39.827 INFO running `"docker" "inspect" "b9d04ad175cadd17d907e6c2bdcee7ccc00d4a6dc0ef30ff527ecb8aa9211b71"`
Nov 27 17:48:40.145 INFO running `"docker" "rm" "-f" "b9d04ad175cadd17d907e6c2bdcee7ccc00d4a6dc0ef30ff527ecb8aa9211b71"`
Nov 27 17:48:40.399 INFO [stdout] b9d04ad175cadd17d907e6c2bdcee7ccc00d4a6dc0ef30ff527ecb8aa9211b71