Oct 21 15:51:35.223 INFO checking mattdeboard/prepend_line against master#155510e377ae2a8d8ee0dad1a5f809c9062a5526 for pr-55192
Oct 21 15:51:35.224 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-55192/worker-3/master#155510e377ae2a8d8ee0dad1a5f809c9062a5526:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-3/pr-55192/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 21 15:51:35.742 INFO blam! 7c7f86318b8d479f8d60b837884361954f5405e5b447f7979d501beb77f206a1
Oct 21 15:51:35.752 INFO running `"docker" "start" "-a" "7c7f86318b8d479f8d60b837884361954f5405e5b447f7979d501beb77f206a1"`
Oct 21 15:51:36.928 INFO kablam! usermod: no changes
Oct 21 15:51:37.102 INFO kablam!    Compiling proc-macro2 v0.4.12
Oct 21 15:51:37.102 INFO kablam!    Compiling wasm-bindgen-shared v0.2.16
Oct 21 15:51:37.128 INFO kablam!    Compiling log v0.4.3
Oct 21 15:51:37.144 INFO kablam!    Compiling ryu v0.2.3
Oct 21 15:51:37.200 INFO kablam!    Compiling serde v1.0.71
Oct 21 15:51:37.220 INFO kablam!     Checking uuid v0.1.18
Oct 21 15:51:40.128 INFO kablam!     Checking mktemp v0.3.1
Oct 21 15:51:42.556 INFO kablam! error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Oct 21 15:51:42.556 INFO kablam!    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Oct 21 15:51:42.556 INFO kablam!     |
Oct 21 15:51:42.556 INFO kablam! 346 |             Span::Nightly(proc_macro::Span::def_site())
Oct 21 15:51:42.556 INFO kablam!     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 21 15:51:42.556 INFO kablam!     |
Oct 21 15:51:42.556 INFO kablam!     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Oct 21 15:51:42.556 INFO kablam! 
Oct 21 15:51:42.604 INFO kablam! error: aborting due to previous error
Oct 21 15:51:42.604 INFO kablam! 
Oct 21 15:51:42.604 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Oct 21 15:51:42.624 INFO kablam! error: Could not compile `proc-macro2`.
Oct 21 15:51:42.624 INFO kablam! warning: build failed, waiting for other jobs to finish...
Oct 21 15:51:52.776 INFO kablam! error: build failed
Oct 21 15:51:52.784 INFO kablam! su: No module specific data is present
Oct 21 15:51:53.378 INFO running `"docker" "rm" "-f" "7c7f86318b8d479f8d60b837884361954f5405e5b447f7979d501beb77f206a1"`
Oct 21 15:51:53.664 INFO blam! 7c7f86318b8d479f8d60b837884361954f5405e5b447f7979d501beb77f206a1