Nov 01 09:54:33.672 INFO checking Techno-coder/signal_processing against try#d7816399d50d407bbce1efe9dbadf8faaaf568fc for pr-55538
Nov 01 09:54:33.672 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-4/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55538/try#d7816399d50d407bbce1efe9dbadf8faaaf568fc:/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 +d7816399d50d407bbce1efe9dbadf8faaaf568fc-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 01 09:54:34.064 INFO blam! edfb107e49a9ec097f72491501337bd8f4fb59da2185e0b1a141c6a689a0c8bd
Nov 01 09:54:34.068 INFO running `"docker" "start" "-a" "edfb107e49a9ec097f72491501337bd8f4fb59da2185e0b1a141c6a689a0c8bd"`
Nov 01 09:54:35.185 INFO kablam! usermod: no changes
Nov 01 09:54:35.320 INFO kablam!     Checking hound v3.4.0
Nov 01 09:54:35.320 INFO kablam!     Checking rustfft v2.1.0
Nov 01 09:54:36.736 INFO kablam!     Checking signal_processing v0.1.0 (/source)
Nov 01 09:54:38.620 INFO kablam! error[E0658]: use of extern prelude names introduced with `extern crate` items is unstable (see issue #54658)
Nov 01 09:54:38.620 INFO kablam!   --> src/convolution.rs:44:6
Nov 01 09:54:38.620 INFO kablam!    |
Nov 01 09:54:38.620 INFO kablam! 44 |     use test::Bencher;
Nov 01 09:54:38.620 INFO kablam!    |         ^^^^
Nov 01 09:54:38.620 INFO kablam!    |
Nov 01 09:54:38.620 INFO kablam!    = help: add #![feature(extern_crate_item_prelude)] to the crate attributes to enable
Nov 01 09:54:38.620 INFO kablam! 
Nov 01 09:54:38.620 INFO kablam! error[E0658]: use of extern prelude names introduced with `extern crate` items is unstable (see issue #54658)
Nov 01 09:54:38.620 INFO kablam!    --> src/short_time_fourier.rs:121:6
Nov 01 09:54:38.620 INFO kablam!     |
Nov 01 09:54:38.620 INFO kablam! 121 |     use test::Bencher;
Nov 01 09:54:38.620 INFO kablam!     |         ^^^^
Nov 01 09:54:38.620 INFO kablam!     |
Nov 01 09:54:38.620 INFO kablam!     = help: add #![feature(extern_crate_item_prelude)] to the crate attributes to enable
Nov 01 09:54:38.620 INFO kablam! 
Nov 01 09:54:38.620 INFO kablam! error[E0658]: use of extern prelude names introduced with `extern crate` items is unstable (see issue #54658)
Nov 01 09:54:38.621 INFO kablam!    --> src/phase_vocoder.rs:168:6
Nov 01 09:54:38.621 INFO kablam!     |
Nov 01 09:54:38.621 INFO kablam! 168 |     use test::Bencher;
Nov 01 09:54:38.621 INFO kablam!     |         ^^^^
Nov 01 09:54:38.621 INFO kablam!     |
Nov 01 09:54:38.621 INFO kablam!     = help: add #![feature(extern_crate_item_prelude)] to the crate attributes to enable
Nov 01 09:54:38.621 INFO kablam! 
Nov 01 09:54:38.621 INFO kablam! error[E0658]: use of extern prelude names introduced with `extern crate` items is unstable (see issue #54658)
Nov 01 09:54:38.621 INFO kablam!   --> src/fast_fourier.rs:45:6
Nov 01 09:54:38.621 INFO kablam!    |
Nov 01 09:54:38.621 INFO kablam! 45 |     use test::Bencher;
Nov 01 09:54:38.621 INFO kablam!    |         ^^^^
Nov 01 09:54:38.621 INFO kablam!    |
Nov 01 09:54:38.621 INFO kablam!    = help: add #![feature(extern_crate_item_prelude)] to the crate attributes to enable
Nov 01 09:54:38.621 INFO kablam! 
Nov 01 09:54:39.464 INFO kablam! error: aborting due to 4 previous errors
Nov 01 09:54:39.464 INFO kablam! 
Nov 01 09:54:39.464 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Nov 01 09:54:39.476 INFO kablam! error: Could not compile `signal_processing`.
Nov 01 09:54:39.476 INFO kablam! warning: build failed, waiting for other jobs to finish...
Nov 01 09:54:40.564 INFO kablam! error: build failed
Nov 01 09:54:40.565 INFO kablam! su: No module specific data is present
Nov 01 09:54:41.806 INFO running `"docker" "rm" "-f" "edfb107e49a9ec097f72491501337bd8f4fb59da2185e0b1a141c6a689a0c8bd"`
Nov 01 09:54:42.244 INFO blam! edfb107e49a9ec097f72491501337bd8f4fb59da2185e0b1a141c6a689a0c8bd