Sep 20 20:59:16.143 INFO checking souvik1997/kernel-roulette against master#f7f4c500b46603386e940f116b469c7adc043a6d for pr-54394
Sep 20 20:59:16.143 INFO running: cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets
Sep 20 20:59:16.143 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-6/pr-54394/master#f7f4c500b46603386e940f116b469c7adc043a6d:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54394/worker-6/master#f7f4c500b46603386e940f116b469c7adc043a6d:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "CMD=cargo +f7f4c500b46603386e940f116b469c7adc043a6d-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 20 20:59:16.330 INFO blam! 73d7de9c047b5abddfb1c56326578a12d2a90a50e02fcc65c4ee7d77ebb61324
Sep 20 20:59:16.332 INFO running `"docker" "start" "-a" "73d7de9c047b5abddfb1c56326578a12d2a90a50e02fcc65c4ee7d77ebb61324"`
Sep 20 20:59:18.467 INFO kablam! usermod: no changes
Sep 20 20:59:18.606 INFO kablam!     Checking spin v0.4.7
Sep 20 20:59:18.614 INFO kablam!     Checking rand v0.4.2
Sep 20 20:59:19.040 INFO kablam! error[E0635]: unknown feature `const_atomic_usize_new`
Sep 20 20:59:19.040 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.7/src/lib.rs:8:76
Sep 20 20:59:19.040 INFO kablam!   |
Sep 20 20:59:19.040 INFO kablam! 8 | #![cfg_attr(feature = "const_fn", feature(const_fn, const_unsafe_cell_new, const_atomic_usize_new))]
Sep 20 20:59:19.040 INFO kablam!   |                                                                            ^^^^^^^^^^^^^^^^^^^^^^
Sep 20 20:59:19.040 INFO kablam! 
Sep 20 20:59:19.040 INFO kablam! error[E0635]: unknown feature `const_unsafe_cell_new`
Sep 20 20:59:19.040 INFO kablam!  --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.7/src/lib.rs:8:53
Sep 20 20:59:19.040 INFO kablam!   |
Sep 20 20:59:19.040 INFO kablam! 8 | #![cfg_attr(feature = "const_fn", feature(const_fn, const_unsafe_cell_new, const_atomic_usize_new))]
Sep 20 20:59:19.040 INFO kablam!   |                                                     ^^^^^^^^^^^^^^^^^^^^^
Sep 20 20:59:19.040 INFO kablam! 
Sep 20 20:59:19.054 INFO kablam! error: aborting due to 2 previous errors
Sep 20 20:59:19.054 INFO kablam! 
Sep 20 20:59:19.054 INFO kablam! For more information about this error, try `rustc --explain E0635`.
Sep 20 20:59:19.061 INFO kablam! error: Could not compile `spin`.
Sep 20 20:59:19.061 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 20 20:59:20.052 INFO kablam! error: build failed
Sep 20 20:59:20.054 INFO kablam! su: No module specific data is present
Sep 20 20:59:21.812 INFO running `"docker" "rm" "-f" "73d7de9c047b5abddfb1c56326578a12d2a90a50e02fcc65c4ee7d77ebb61324"`
Sep 20 20:59:21.936 INFO blam! 73d7de9c047b5abddfb1c56326578a12d2a90a50e02fcc65c4ee7d77ebb61324