Oct 27 00:53:14.898 INFO checking mattdeboard/prepend_line against try#19f01b935b91481fd445b16b533d2f87661bf12e for pr-55192-2
Oct 27 00:53:14.899 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-55192-2/worker-2/try#19f01b935b91481fd445b16b533d2f87661bf12e:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-2/pr-55192-2/try#19f01b935b91481fd445b16b533d2f87661bf12e:/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 +19f01b935b91481fd445b16b533d2f87661bf12e-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 00:53:15.480 INFO blam! 04ba1467b7c982fb921bb8f7c1baf0204c1ba9cc5de6abcd463c0fe87bb6ac1b
Oct 27 00:53:15.482 INFO running `"docker" "start" "-a" "04ba1467b7c982fb921bb8f7c1baf0204c1ba9cc5de6abcd463c0fe87bb6ac1b"`
Oct 27 00:53:18.058 INFO kablam! usermod: no changes
Oct 27 00:53:18.259 INFO kablam!    Compiling proc-macro2 v0.4.12
Oct 27 00:53:18.260 INFO kablam!    Compiling wasm-bindgen-shared v0.2.16
Oct 27 00:53:18.328 INFO kablam!    Compiling log v0.4.3
Oct 27 00:53:18.328 INFO kablam!    Compiling serde v1.0.71
Oct 27 00:53:18.329 INFO kablam!    Compiling ryu v0.2.3
Oct 27 00:53:18.329 INFO kablam!     Checking uuid v0.1.18
Oct 27 00:53:21.584 INFO kablam!     Checking mktemp v0.3.1
Oct 27 00:53:25.239 INFO kablam! error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Oct 27 00:53:25.240 INFO kablam!    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Oct 27 00:53:25.241 INFO kablam!     |
Oct 27 00:53:25.241 INFO kablam! 346 |             Span::Nightly(proc_macro::Span::def_site())
Oct 27 00:53:25.242 INFO kablam!     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 27 00:53:25.243 INFO kablam!     |
Oct 27 00:53:25.243 INFO kablam!     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Oct 27 00:53:25.244 INFO kablam! 
Oct 27 00:53:25.283 INFO kablam! error: aborting due to previous error
Oct 27 00:53:25.284 INFO kablam! 
Oct 27 00:53:25.284 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Oct 27 00:53:25.303 INFO kablam! error: Could not compile `proc-macro2`.
Oct 27 00:53:25.303 INFO kablam! warning: build failed, waiting for other jobs to finish...
Oct 27 00:53:34.376 INFO kablam! error: build failed
Oct 27 00:53:34.378 INFO kablam! su: No module specific data is present
Oct 27 00:53:35.688 INFO running `"docker" "rm" "-f" "04ba1467b7c982fb921bb8f7c1baf0204c1ba9cc5de6abcd463c0fe87bb6ac1b"`
Oct 27 00:53:36.007 INFO blam! 04ba1467b7c982fb921bb8f7c1baf0204c1ba9cc5de6abcd463c0fe87bb6ac1b