Oct 14 12:01:22.649 INFO testing mattdeboard/prepend_line against try#40d4795669493f1965de7c44029c69552134fe1f for rustdoc-test-static-cling-1
Oct 14 12:01:22.651 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/rustdoc-test-static-cling-1/worker-0/try#40d4795669493f1965de7c44029c69552134fe1f:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-0/rustdoc-test-static-cling-1/try#40d4795669493f1965de7c44029c69552134fe1f:/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 +40d4795669493f1965de7c44029c69552134fe1f-alt build --frozen" "-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 14 12:01:23.192 INFO blam! fce2d53c0647c86668351683314797eaa838f7cb11dad7690de1134ad1865606
Oct 14 12:01:23.194 INFO running `"docker" "start" "-a" "fce2d53c0647c86668351683314797eaa838f7cb11dad7690de1134ad1865606"`
Oct 14 12:01:24.459 INFO kablam! usermod: no changes
Oct 14 12:01:24.647 INFO kablam!    Compiling proc-macro2 v0.4.12
Oct 14 12:01:24.651 INFO kablam!    Compiling ryu v0.2.3
Oct 14 12:01:24.659 INFO kablam!    Compiling serde v1.0.71
Oct 14 12:01:24.679 INFO kablam!    Compiling wasm-bindgen-shared v0.2.16
Oct 14 12:01:24.680 INFO kablam!    Compiling itoa v0.4.2
Oct 14 12:01:24.681 INFO kablam!    Compiling cfg-if v0.1.5
Oct 14 12:01:24.736 INFO kablam!    Compiling regex v1.0.2
Oct 14 12:01:24.743 INFO kablam!    Compiling rand v0.4.2
Oct 14 12:01:25.375 INFO kablam!    Compiling memchr v2.0.1
Oct 14 12:01:27.734 INFO kablam!    Compiling regex-syntax v0.6.2
Oct 14 12:01:27.742 INFO kablam!    Compiling log v0.4.3
Oct 14 12:01:27.748 INFO kablam!    Compiling aho-corasick v0.6.6
Oct 14 12:01:28.312 INFO kablam!    Compiling lazy_static v1.1.0
Oct 14 12:01:29.130 INFO kablam!    Compiling thread_local v0.3.5
Oct 14 12:01:32.335 INFO kablam! error[E0658]: use of unstable library feature 'proc_macro_def_site' (see issue #54724)
Oct 14 12:01:32.335 INFO kablam!    --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro2-0.4.12/src/unstable.rs:346:27
Oct 14 12:01:32.335 INFO kablam!     |
Oct 14 12:01:32.335 INFO kablam! 346 |             Span::Nightly(proc_macro::Span::def_site())
Oct 14 12:01:32.335 INFO kablam!     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^
Oct 14 12:01:32.347 INFO kablam!     |
Oct 14 12:01:32.347 INFO kablam!     = help: add #![feature(proc_macro_def_site)] to the crate attributes to enable
Oct 14 12:01:32.347 INFO kablam! 
Oct 14 12:01:32.455 INFO kablam! error: aborting due to previous error
Oct 14 12:01:32.487 INFO kablam! 
Oct 14 12:01:32.487 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Oct 14 12:01:32.575 INFO kablam! error: Could not compile `proc-macro2`.
Oct 14 12:01:32.575 INFO kablam! warning: build failed, waiting for other jobs to finish...
Oct 14 12:01:54.027 INFO kablam! error: build failed
Oct 14 12:01:54.028 INFO kablam! su: No module specific data is present
Oct 14 12:01:55.587 INFO running `"docker" "rm" "-f" "fce2d53c0647c86668351683314797eaa838f7cb11dad7690de1134ad1865606"`
Oct 14 12:01:55.935 INFO blam! fce2d53c0647c86668351683314797eaa838f7cb11dad7690de1134ad1865606