Sep 19 21:57:19.057 INFO checking nccl-0.4.3 against master#ff6422d7a392acfc8af28994d65af2bbaecea4f6 for pr-54346
Sep 19 21:57:19.057 INFO running: cargo +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets
Sep 19 21:57:19.057 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-4/pr-54346/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-54346/worker-4/master#ff6422d7a392acfc8af28994d65af2bbaecea4f6:/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 +ff6422d7a392acfc8af28994d65af2bbaecea4f6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "1536M" "crater"`
Sep 19 21:57:19.314 INFO blam! 018fd05b472afc0654b2e4d6f54eee77f8d09fab5c934b84c18401dee4ef8cb3
Sep 19 21:57:19.319 INFO running `"docker" "start" "-a" "018fd05b472afc0654b2e4d6f54eee77f8d09fab5c934b84c18401dee4ef8cb3"`
Sep 19 21:57:20.116 INFO kablam! usermod: no changes
Sep 19 21:57:20.151 INFO kablam!     Checking nccl v0.4.3 (/source)
Sep 19 21:57:21.119 INFO kablam! warning: unused `#[macro_use]` import
Sep 19 21:57:21.119 INFO kablam!  --> tests/nccl.rs:2:1
Sep 19 21:57:21.119 INFO kablam!   |
Sep 19 21:57:21.119 INFO kablam! 2 | #[macro_use]
Sep 19 21:57:21.119 INFO kablam!   | ^^^^^^^^^^^^
Sep 19 21:57:21.119 INFO kablam!   |
Sep 19 21:57:21.119 INFO kablam!   = note: #[warn(unused_imports)] on by default
Sep 19 21:57:21.119 INFO kablam! 
Sep 19 21:57:21.303 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 1.16s
Sep 19 21:57:21.307 INFO kablam! su: No module specific data is present
Sep 19 21:57:22.094 INFO running `"docker" "rm" "-f" "018fd05b472afc0654b2e4d6f54eee77f8d09fab5c934b84c18401dee4ef8cb3"`
Sep 19 21:57:22.327 INFO blam! 018fd05b472afc0654b2e4d6f54eee77f8d09fab5c934b84c18401dee4ef8cb3