Nov 01 01:12:17.528 INFO checking mattdeboard/prepend_line against master#05812fa8c588473f03e3fa7cf59cd84f4f37c715 for pr-55538
Nov 01 01:12:17.529 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-5/master#05812fa8c588473f03e3fa7cf59cd84f4f37c715:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-55538/master#05812fa8c588473f03e3fa7cf59cd84f4f37c715:/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 +05812fa8c588473f03e3fa7cf59cd84f4f37c715-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 01 01:12:17.821 INFO blam! d18e83f4eb78319c4ec70587c0b7a138d4ea3d22f3b264e05ad0ba7e342413a9
Nov 01 01:12:17.825 INFO running `"docker" "start" "-a" "d18e83f4eb78319c4ec70587c0b7a138d4ea3d22f3b264e05ad0ba7e342413a9"`
Nov 01 01:12:18.576 INFO kablam! usermod: no changes
Nov 01 01:12:18.769 INFO kablam!    Compiling proc-macro2 v0.4.12
Nov 01 01:12:18.769 INFO kablam!    Compiling wasm-bindgen-shared v0.2.16
Nov 01 01:12:18.781 INFO kablam!    Compiling log v0.4.3
Nov 01 01:12:18.788 INFO kablam!    Compiling serde v1.0.71
Nov 01 01:12:18.792 INFO kablam!     Checking rand v0.3.22
Nov 01 01:12:18.793 INFO kablam!     Checking regex v1.0.2
Nov 01 01:12:20.637 INFO kablam!     Checking uuid v0.1.18
Nov 01 01:12:21.893 INFO kablam!     Checking mktemp v0.3.1
Nov 01 01:12:25.808 INFO kablam! error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Nov 01 01:12:25.808 INFO kablam!    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Nov 01 01:12:25.808 INFO kablam!     |
Nov 01 01:12:25.808 INFO kablam! 346 |             Span::Nightly(proc_macro::Span::def_site())
Nov 01 01:12:25.808 INFO kablam!     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 01 01:12:25.808 INFO kablam!     |
Nov 01 01:12:25.808 INFO kablam!     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Nov 01 01:12:25.808 INFO kablam! 
Nov 01 01:12:25.861 INFO kablam! error: aborting due to previous error
Nov 01 01:12:25.862 INFO kablam! 
Nov 01 01:12:25.862 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Nov 01 01:12:25.893 INFO kablam! error: Could not compile `proc-macro2`.
Nov 01 01:12:25.893 INFO kablam! warning: build failed, waiting for other jobs to finish...
Nov 01 01:12:35.306 INFO kablam! error: build failed
Nov 01 01:12:35.307 INFO kablam! su: No module specific data is present
Nov 01 01:12:36.046 INFO running `"docker" "rm" "-f" "d18e83f4eb78319c4ec70587c0b7a138d4ea3d22f3b264e05ad0ba7e342413a9"`
Nov 01 01:12:36.260 INFO blam! d18e83f4eb78319c4ec70587c0b7a138d4ea3d22f3b264e05ad0ba7e342413a9