Nov 06 18:01:11.833 INFO checking mattdeboard/prepend_line against master#24e66c28980442a48d9458f1a4f9b76cc722dc8a for pr-55687
Nov 06 18:01:11.833 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55687/worker-7/master#24e66c28980442a48d9458f1a4f9b76cc722dc8a:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-55687/master#24e66c28980442a48d9458f1a4f9b76cc722dc8a:/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 +24e66c28980442a48d9458f1a4f9b76cc722dc8a-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 06 18:01:12.378 INFO blam! 74753687932a1355869a35c9fced561bf415044e32e4a38a21d57a5aabf614c4
Nov 06 18:01:12.380 INFO running `"docker" "start" "-a" "74753687932a1355869a35c9fced561bf415044e32e4a38a21d57a5aabf614c4"`
Nov 06 18:01:13.585 INFO kablam! usermod: no changes
Nov 06 18:01:13.800 INFO kablam!    Compiling proc-macro2 v0.4.12
Nov 06 18:01:13.800 INFO kablam!    Compiling wasm-bindgen-shared v0.2.16
Nov 06 18:01:13.800 INFO kablam!    Compiling log v0.4.3
Nov 06 18:01:13.801 INFO kablam!    Compiling serde v1.0.71
Nov 06 18:01:13.810 INFO kablam!     Checking uuid v0.1.18
Nov 06 18:01:13.810 INFO kablam!     Checking thread_local v0.3.5
Nov 06 18:01:15.886 INFO kablam!     Checking regex v1.0.2
Nov 06 18:01:16.546 INFO kablam!     Checking mktemp v0.3.1
Nov 06 18:01:21.361 INFO kablam! error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Nov 06 18:01:21.362 INFO kablam!    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Nov 06 18:01:21.363 INFO kablam!     |
Nov 06 18:01:21.363 INFO kablam! 346 |             Span::Nightly(proc_macro::Span::def_site())
Nov 06 18:01:21.364 INFO kablam!     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 06 18:01:21.380 INFO kablam!     |
Nov 06 18:01:21.381 INFO kablam!     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Nov 06 18:01:21.382 INFO kablam! 
Nov 06 18:01:21.429 INFO kablam! error: aborting due to previous error
Nov 06 18:01:21.440 INFO kablam! 
Nov 06 18:01:21.441 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Nov 06 18:01:21.477 INFO kablam! error: Could not compile `proc-macro2`.
Nov 06 18:01:21.478 INFO kablam! warning: build failed, waiting for other jobs to finish...
Nov 06 18:01:32.131 INFO kablam! error: build failed
Nov 06 18:01:32.137 INFO kablam! su: No module specific data is present
Nov 06 18:01:32.713 INFO running `"docker" "rm" "-f" "74753687932a1355869a35c9fced561bf415044e32e4a38a21d57a5aabf614c4"`
Nov 06 18:01:33.030 INFO blam! 74753687932a1355869a35c9fced561bf415044e32e4a38a21d57a5aabf614c4