Dec 18 13:51:45.469 INFO checking mpack-0.1.2 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 13:51:45.469 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/mpack/0.1.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 13:51:45.844 INFO [stdout] 3e04636fde399c5dd50c4162ccc1e5ae2333942600e935fe391b3dfb3f449875
Dec 18 13:51:45.846 INFO running `"docker" "start" "-a" "3e04636fde399c5dd50c4162ccc1e5ae2333942600e935fe391b3dfb3f449875"`
Dec 18 13:51:47.368 INFO [stderr]     Checking mpack v0.1.2 (/opt/crater/workdir)
Dec 18 13:51:47.680 INFO [stderr] warning: unused macro definition
Dec 18 13:51:47.680 INFO [stderr]   --> src/lib.rs:38:1
Dec 18 13:51:47.680 INFO [stderr]    |
Dec 18 13:51:47.680 INFO [stderr] 38 | / macro_rules! nth_byte(
Dec 18 13:51:47.680 INFO [stderr] 39 | |     ($x:expr, $n:expr) => ((($x >> ($n * 8)) & 0xFF) as u8)
Dec 18 13:51:47.680 INFO [stderr] 40 | | );
Dec 18 13:51:47.680 INFO [stderr]    | |__^
Dec 18 13:51:47.680 INFO [stderr]    |
Dec 18 13:51:47.680 INFO [stderr]    = note: #[warn(unused_macros)] on by default
Dec 18 13:51:47.680 INFO [stderr] 
Dec 18 13:51:47.896 INFO [stderr] warning: unused macro definition
Dec 18 13:51:47.896 INFO [stderr]   --> src/lib.rs:38:1
Dec 18 13:51:47.896 INFO [stderr]    |
Dec 18 13:51:47.896 INFO [stderr] 38 | / macro_rules! nth_byte(
Dec 18 13:51:47.896 INFO [stderr] 39 | |     ($x:expr, $n:expr) => ((($x >> ($n * 8)) & 0xFF) as u8)
Dec 18 13:51:47.896 INFO [stderr] 40 | | );
Dec 18 13:51:47.896 INFO [stderr]    | |__^
Dec 18 13:51:47.896 INFO [stderr]    |
Dec 18 13:51:47.896 INFO [stderr]    = note: #[warn(unused_macros)] on by default
Dec 18 13:51:47.896 INFO [stderr] 
Dec 18 13:51:47.904 INFO [stderr] warning: unused import: `std::mem`
Dec 18 13:51:47.904 INFO [stderr]    --> src/lib.rs:717:9
Dec 18 13:51:47.904 INFO [stderr]     |
Dec 18 13:51:47.904 INFO [stderr] 717 |     use std::mem;
Dec 18 13:51:47.904 INFO [stderr]     |         ^^^^^^^^
Dec 18 13:51:47.904 INFO [stderr]     |
Dec 18 13:51:47.904 INFO [stderr]     = note: #[warn(unused_imports)] on by default
Dec 18 13:51:47.904 INFO [stderr] 
Dec 18 13:51:47.904 INFO [stderr] warning: unused import: `std::slice`
Dec 18 13:51:47.904 INFO [stderr]    --> src/lib.rs:718:9
Dec 18 13:51:47.904 INFO [stderr]     |
Dec 18 13:51:47.904 INFO [stderr] 718 |     use std::slice;
Dec 18 13:51:47.904 INFO [stderr]     |         ^^^^^^^^^^
Dec 18 13:51:47.904 INFO [stderr] 
Dec 18 13:51:48.508 INFO [stderr] warning: borrow of packed field is unsafe and requires unsafe function or block (error E0133)
Dec 18 13:51:48.508 INFO [stderr]    --> src/lib.rs:820:9
Dec 18 13:51:48.508 INFO [stderr]     |
Dec 18 13:51:48.512 INFO [stderr] 820 |         assert_eq!(x.b, 42);
Dec 18 13:51:48.512 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
Dec 18 13:51:48.512 INFO [stderr]     |
Dec 18 13:51:48.512 INFO [stderr]     = note: #[warn(safe_packed_borrows)] on by default
Dec 18 13:51:48.512 INFO [stderr]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
Dec 18 13:51:48.512 INFO [stderr]     = note: for more information, see issue #46043 <https://github.com/rust-lang/rust/issues/46043>
Dec 18 13:51:48.512 INFO [stderr]     = note: fields of packed structs might be misaligned: dereferencing a misaligned pointer or even just creating a misaligned reference is undefined behavior
Dec 18 13:51:48.512 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 13:51:48.512 INFO [stderr] 
Dec 18 13:51:48.564 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
Dec 18 13:51:49.246 INFO running `"docker" "inspect" "3e04636fde399c5dd50c4162ccc1e5ae2333942600e935fe391b3dfb3f449875"`
Dec 18 13:51:49.340 INFO running `"docker" "rm" "-f" "3e04636fde399c5dd50c4162ccc1e5ae2333942600e935fe391b3dfb3f449875"`
Dec 18 13:51:49.486 INFO [stdout] 3e04636fde399c5dd50c4162ccc1e5ae2333942600e935fe391b3dfb3f449875