Oct 27 00:53:36.113 INFO checking mattdeboard/prepend_line against master#155510e377ae2a8d8ee0dad1a5f809c9062a5526 for pr-55192-2
Oct 27 00:53:36.115 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-55192-2/worker-2/master#155510e377ae2a8d8ee0dad1a5f809c9062a5526:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-2/pr-55192-2/master#155510e377ae2a8d8ee0dad1a5f809c9062a5526:/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 +155510e377ae2a8d8ee0dad1a5f809c9062a5526-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"`
Oct 27 00:53:36.480 INFO blam! 34b456a3ad3962914cc8eda10e919b3b3f5d5846186b61a3d2d83c4b1e64bfa0
Oct 27 00:53:36.482 INFO running `"docker" "start" "-a" "34b456a3ad3962914cc8eda10e919b3b3f5d5846186b61a3d2d83c4b1e64bfa0"`
Oct 27 00:53:38.983 INFO kablam! usermod: no changes
Oct 27 00:53:39.115 INFO kablam!    Compiling proc-macro2 v0.4.12
Oct 27 00:53:39.115 INFO kablam!    Compiling wasm-bindgen-shared v0.2.16
Oct 27 00:53:39.123 INFO kablam!    Compiling log v0.4.3
Oct 27 00:53:39.123 INFO kablam!    Compiling ryu v0.2.3
Oct 27 00:53:39.123 INFO kablam!     Checking uuid v0.1.18
Oct 27 00:53:40.787 INFO kablam!     Checking mktemp v0.3.1
Oct 27 00:53:41.731 INFO kablam!    Compiling serde_json v1.0.26
Oct 27 00:53:45.071 INFO kablam! error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Oct 27 00:53:45.071 INFO kablam!    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Oct 27 00:53:45.071 INFO kablam!     |
Oct 27 00:53:45.071 INFO kablam! 346 |             Span::Nightly(proc_macro::Span::def_site())
Oct 27 00:53:45.071 INFO kablam!     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 27 00:53:45.071 INFO kablam!     |
Oct 27 00:53:45.071 INFO kablam!     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Oct 27 00:53:45.071 INFO kablam! 
Oct 27 00:53:45.095 INFO kablam! error: aborting due to previous error
Oct 27 00:53:45.096 INFO kablam! 
Oct 27 00:53:45.096 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Oct 27 00:53:45.105 INFO kablam! error: Could not compile `proc-macro2`.
Oct 27 00:53:45.106 INFO kablam! warning: build failed, waiting for other jobs to finish...
Oct 27 00:53:47.745 INFO kablam! error: build failed
Oct 27 00:53:47.747 INFO kablam! su: No module specific data is present
Oct 27 00:53:48.505 INFO running `"docker" "rm" "-f" "34b456a3ad3962914cc8eda10e919b3b3f5d5846186b61a3d2d83c4b1e64bfa0"`
Oct 27 00:53:48.803 INFO blam! 34b456a3ad3962914cc8eda10e919b3b3f5d5846186b61a3d2d83c4b1e64bfa0