Dec 18 18:47:06.673 INFO checking acid-state-0.2.3 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 18:47:06.673 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/acid-state/0.2.3:/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 18:47:07.073 INFO [stdout] e30a1aeec1dacfd33755d88c14042e9076cd4483b267cd9021878b9c024268f4
Dec 18 18:47:07.078 INFO running `"docker" "start" "-a" "e30a1aeec1dacfd33755d88c14042e9076cd4483b267cd9021878b9c024268f4"`
Dec 18 18:47:08.022 INFO [stderr]     Checking acid-state v0.2.3 (/opt/crater/workdir)
Dec 18 18:47:08.396 INFO [stderr] warning: unused `#[macro_use]` import
Dec 18 18:47:08.396 INFO [stderr]   --> src/lib.rs:49:1
Dec 18 18:47:08.396 INFO [stderr]    |
Dec 18 18:47:08.396 INFO [stderr] 49 | #[macro_use]
Dec 18 18:47:08.396 INFO [stderr]    | ^^^^^^^^^^^^
Dec 18 18:47:08.396 INFO [stderr]    |
Dec 18 18:47:08.396 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 18 18:47:08.396 INFO [stderr] 
Dec 18 18:47:08.450 INFO [stderr] warning: unused `#[macro_use]` import
Dec 18 18:47:08.450 INFO [stderr]   --> src/lib.rs:49:1
Dec 18 18:47:08.450 INFO [stderr]    |
Dec 18 18:47:08.450 INFO [stderr] 49 | #[macro_use]
Dec 18 18:47:08.450 INFO [stderr]    | ^^^^^^^^^^^^
Dec 18 18:47:08.450 INFO [stderr]    |
Dec 18 18:47:08.450 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 18 18:47:08.450 INFO [stderr] 
Dec 18 18:47:08.487 INFO [stderr] warning: method is never used: `clear`
Dec 18 18:47:08.487 INFO [stderr]   --> src/wrapper_structs.rs:54:5
Dec 18 18:47:08.487 INFO [stderr]    |
Dec 18 18:47:08.487 INFO [stderr] 54 |     fn clear(&self) -> io::Result<()> {
Dec 18 18:47:08.487 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 18:47:08.487 INFO [stderr]    |
Dec 18 18:47:08.487 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 18:47:08.487 INFO [stderr] 
Dec 18 18:47:08.487 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 18:47:08.487 INFO [stderr]   --> src/wrapper_structs.rs:70:9
Dec 18 18:47:08.487 INFO [stderr]    |
Dec 18 18:47:08.487 INFO [stderr] 70 |         f.sync_all();
Dec 18 18:47:08.487 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 18 18:47:08.487 INFO [stderr]    |
Dec 18 18:47:08.487 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 18:47:08.487 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 18:47:08.487 INFO [stderr] 
Dec 18 18:47:08.487 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 18:47:08.487 INFO [stderr]   --> src/wrapper_structs.rs:88:9
Dec 18 18:47:08.487 INFO [stderr]    |
Dec 18 18:47:08.487 INFO [stderr] 88 |         self.write();
Dec 18 18:47:08.487 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 18 18:47:08.487 INFO [stderr]    |
Dec 18 18:47:08.487 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 18:47:08.487 INFO [stderr] 
Dec 18 18:47:08.498 INFO [stderr] warning: method is never used: `clear`
Dec 18 18:47:08.498 INFO [stderr]   --> src/wrapper_structs.rs:54:5
Dec 18 18:47:08.498 INFO [stderr]    |
Dec 18 18:47:08.498 INFO [stderr] 54 |     fn clear(&self) -> io::Result<()> {
Dec 18 18:47:08.498 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 18:47:08.498 INFO [stderr]    |
Dec 18 18:47:08.498 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 18:47:08.503 INFO [stderr] 
Dec 18 18:47:08.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 18:47:08.533 INFO [stderr]   --> src/wrapper_structs.rs:70:9
Dec 18 18:47:08.533 INFO [stderr]    |
Dec 18 18:47:08.533 INFO [stderr] 70 |         f.sync_all();
Dec 18 18:47:08.533 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 18 18:47:08.533 INFO [stderr]    |
Dec 18 18:47:08.533 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 18:47:08.533 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 18:47:08.533 INFO [stderr] 
Dec 18 18:47:08.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 18:47:08.533 INFO [stderr]   --> src/wrapper_structs.rs:88:9
Dec 18 18:47:08.533 INFO [stderr]    |
Dec 18 18:47:08.533 INFO [stderr] 88 |         self.write();
Dec 18 18:47:08.533 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 18 18:47:08.533 INFO [stderr]    |
Dec 18 18:47:08.533 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 18:47:08.533 INFO [stderr] 
Dec 18 18:47:09.014 INFO [stderr] warning: variable does not need to be mutable
Dec 18 18:47:09.014 INFO [stderr]   --> test/test.rs:28:17
Dec 18 18:47:09.014 INFO [stderr]    |
Dec 18 18:47:09.014 INFO [stderr] 28 |             let mut current = a.entry(key).or_insert(0);
Dec 18 18:47:09.014 INFO [stderr]    |                 ----^^^^^^^
Dec 18 18:47:09.014 INFO [stderr]    |                 |
Dec 18 18:47:09.014 INFO [stderr]    |                 help: remove this `mut`
Dec 18 18:47:09.014 INFO [stderr]    |
Dec 18 18:47:09.014 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 18:47:09.014 INFO [stderr] 
Dec 18 18:47:09.042 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
Dec 18 18:47:09.353 INFO running `"docker" "inspect" "e30a1aeec1dacfd33755d88c14042e9076cd4483b267cd9021878b9c024268f4"`
Dec 18 18:47:09.436 INFO running `"docker" "rm" "-f" "e30a1aeec1dacfd33755d88c14042e9076cd4483b267cd9021878b9c024268f4"`
Dec 18 18:47:09.524 INFO [stdout] e30a1aeec1dacfd33755d88c14042e9076cd4483b267cd9021878b9c024268f4