Oct 12 19:01:56.781 INFO checking khuey/rustc-1.18-regression against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 12 19:01:56.781 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-7/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-7/pr-54977/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/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 +4021bd0b3c5815b087d6db10ce461e7e4854ade7-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 12 19:01:57.144 INFO blam! 79c57a3393005251d17c468535a236498009cb022f605dbe82c6f0556f2ac468
Oct 12 19:01:57.156 INFO running `"docker" "start" "-a" "79c57a3393005251d17c468535a236498009cb022f605dbe82c6f0556f2ac468"`
Oct 12 19:01:58.260 INFO kablam! usermod: no changes
Oct 12 19:01:58.308 INFO kablam!     Checking regression v0.1.0 (/source)
Oct 12 19:01:58.801 INFO kablam! warning: function is never used: `main`
Oct 12 19:01:58.808 INFO kablam!  --> src/lib.rs:8:1
Oct 12 19:01:58.808 INFO kablam!   |
Oct 12 19:01:58.809 INFO kablam! 8 | fn main() {
Oct 12 19:01:58.809 INFO kablam!   | ^^^^^^^^^
Oct 12 19:01:58.809 INFO kablam!   |
Oct 12 19:01:58.809 INFO kablam!   = note: #[warn(dead_code)] on by default
Oct 12 19:01:58.810 INFO kablam! 
Oct 12 19:01:59.022 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
Oct 12 19:01:59.026 INFO kablam! su: No module specific data is present
Oct 12 19:01:59.658 INFO running `"docker" "rm" "-f" "79c57a3393005251d17c468535a236498009cb022f605dbe82c6f0556f2ac468"`
Oct 12 19:01:59.944 INFO blam! 79c57a3393005251d17c468535a236498009cb022f605dbe82c6f0556f2ac468