Oct 13 15:42:56.867 INFO checking embedded-builder-0.1.1 against try#4021bd0b3c5815b087d6db10ce461e7e4854ade7 for pr-54977
Oct 13 15:42:56.867 INFO running `"docker" "create" "-v" "/mnt/big/crater/./work/local/target-dirs/pr-54977/worker-6/try#4021bd0b3c5815b087d6db10ce461e7e4854ade7:/target:rw,Z" "-v" "/mnt/big/crater/./work/local/test-source/worker-6/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 13 15:42:57.092 INFO blam! 178b72716622c40b7a15e621ab01bafa7ffe5f614ed6106c302f8da9601537dd
Oct 13 15:42:57.093 INFO running `"docker" "start" "-a" "178b72716622c40b7a15e621ab01bafa7ffe5f614ed6106c302f8da9601537dd"`
Oct 13 15:42:57.665 INFO kablam! usermod: no changes
Oct 13 15:42:57.702 INFO kablam!     Checking embedded-builder v0.1.1 (/source)
Oct 13 15:42:57.788 INFO kablam! warning: unused macro definition
Oct 13 15:42:57.789 INFO kablam!   --> src/helpers.rs:20:1
Oct 13 15:42:57.789 INFO kablam!    |
Oct 13 15:42:57.789 INFO kablam! 20 | / macro_rules! concat {
Oct 13 15:42:57.789 INFO kablam! 21 | |     ($a: expr, $b: expr) => { $a$b };
Oct 13 15:42:57.789 INFO kablam! 22 | | }
Oct 13 15:42:57.789 INFO kablam!    | |_^
Oct 13 15:42:57.789 INFO kablam!    |
Oct 13 15:42:57.789 INFO kablam!    = note: #[warn(unused_macros)] on by default
Oct 13 15:42:57.789 INFO kablam! 
Oct 13 15:42:57.858 INFO kablam! warning: the feature `used` has been stable since 1.30.0 and no longer requires an attribute to enable
Oct 13 15:42:57.858 INFO kablam!  --> src/lib.rs:4:12
Oct 13 15:42:57.858 INFO kablam!   |
Oct 13 15:42:57.858 INFO kablam! 4 | #![feature(used)]
Oct 13 15:42:57.859 INFO kablam!   |            ^^^^
Oct 13 15:42:57.859 INFO kablam!   |
Oct 13 15:42:57.859 INFO kablam!   = note: #[warn(stable_features)] on by default
Oct 13 15:42:57.859 INFO kablam! 
Oct 13 15:42:58.249 INFO kablam! warning: unused macro definition
Oct 13 15:42:58.250 INFO kablam!   --> src/helpers.rs:20:1
Oct 13 15:42:58.250 INFO kablam!    |
Oct 13 15:42:58.250 INFO kablam! 20 | / macro_rules! concat {
Oct 13 15:42:58.250 INFO kablam! 21 | |     ($a: expr, $b: expr) => { $a$b };
Oct 13 15:42:58.250 INFO kablam! 22 | | }
Oct 13 15:42:58.250 INFO kablam!    | |_^
Oct 13 15:42:58.250 INFO kablam!    |
Oct 13 15:42:58.250 INFO kablam!    = note: #[warn(unused_macros)] on by default
Oct 13 15:42:58.250 INFO kablam! 
Oct 13 15:42:58.437 INFO kablam! warning: variable does not need to be mutable
Oct 13 15:42:58.437 INFO kablam!    --> src/register.rs:210:13
Oct 13 15:42:58.437 INFO kablam!     |
Oct 13 15:42:58.438 INFO kablam! 210 |         let mut r = Register::<u16>(0, 0xFAF0);
Oct 13 15:42:58.438 INFO kablam!     |             ----^
Oct 13 15:42:58.438 INFO kablam!     |             |
Oct 13 15:42:58.438 INFO kablam!     |             help: remove this `mut`
Oct 13 15:42:58.438 INFO kablam!     |
Oct 13 15:42:58.438 INFO kablam!     = note: #[warn(unused_mut)] on by default
Oct 13 15:42:58.438 INFO kablam! 
Oct 13 15:42:58.440 INFO kablam! warning: the feature `used` has been stable since 1.30.0 and no longer requires an attribute to enable
Oct 13 15:42:58.440 INFO kablam!  --> src/lib.rs:4:12
Oct 13 15:42:58.440 INFO kablam!   |
Oct 13 15:42:58.440 INFO kablam! 4 | #![feature(used)]
Oct 13 15:42:58.440 INFO kablam!   |            ^^^^
Oct 13 15:42:58.440 INFO kablam!   |
Oct 13 15:42:58.440 INFO kablam!   = note: #[warn(stable_features)] on by default
Oct 13 15:42:58.440 INFO kablam! 
Oct 13 15:42:58.467 INFO kablam!     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
Oct 13 15:42:58.468 INFO kablam! su: No module specific data is present
Oct 13 15:42:58.698 INFO running `"docker" "rm" "-f" "178b72716622c40b7a15e621ab01bafa7ffe5f614ed6106c302f8da9601537dd"`
Oct 13 15:42:58.774 INFO blam! 178b72716622c40b7a15e621ab01bafa7ffe5f614ed6106c302f8da9601537dd