Dec 01 02:24:26.335 INFO checking acid-state-0.2.3 against try#32252761328f59ccfadb1bafb8148c685bc830b3 for pr-56323
Dec 01 02:24:26.335 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-4/try#32252761328f59ccfadb1bafb8148c685bc830b3:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56323/try#32252761328f59ccfadb1bafb8148c685bc830b3:/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 +32252761328f59ccfadb1bafb8148c685bc830b3-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"`
Dec 01 02:24:26.598 INFO [stdout] 35b8e7a80ade08608080bfbfd267a12a0931ca361a7561110d4938223746a51f
Dec 01 02:24:26.605 INFO running `"docker" "start" "-a" "35b8e7a80ade08608080bfbfd267a12a0931ca361a7561110d4938223746a51f"`
Dec 01 02:24:27.401 INFO [stderr] usermod: no changes
Dec 01 02:24:27.468 INFO [stderr]     Checking acid-state v0.2.3 (/source)
Dec 01 02:24:28.295 INFO [stderr] warning: unused `#[macro_use]` import
Dec 01 02:24:28.295 INFO [stderr]   --> src/lib.rs:49:1
Dec 01 02:24:28.295 INFO [stderr]    |
Dec 01 02:24:28.295 INFO [stderr] 49 | #[macro_use]
Dec 01 02:24:28.295 INFO [stderr]    | ^^^^^^^^^^^^
Dec 01 02:24:28.295 INFO [stderr]    |
Dec 01 02:24:28.295 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 01 02:24:28.295 INFO [stderr] 
Dec 01 02:24:28.356 INFO [stderr] warning: method is never used: `clear`
Dec 01 02:24:28.356 INFO [stderr]   --> src/wrapper_structs.rs:54:5
Dec 01 02:24:28.356 INFO [stderr]    |
Dec 01 02:24:28.356 INFO [stderr] 54 |     fn clear(&self) -> io::Result<()> {
Dec 01 02:24:28.356 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 02:24:28.356 INFO [stderr]    |
Dec 01 02:24:28.356 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 01 02:24:28.356 INFO [stderr] 
Dec 01 02:24:28.364 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 02:24:28.364 INFO [stderr]   --> src/wrapper_structs.rs:70:9
Dec 01 02:24:28.364 INFO [stderr]    |
Dec 01 02:24:28.364 INFO [stderr] 70 |         f.sync_all();
Dec 01 02:24:28.364 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 01 02:24:28.364 INFO [stderr]    |
Dec 01 02:24:28.364 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 01 02:24:28.364 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 02:24:28.364 INFO [stderr] 
Dec 01 02:24:28.364 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 02:24:28.364 INFO [stderr]   --> src/wrapper_structs.rs:88:9
Dec 01 02:24:28.364 INFO [stderr]    |
Dec 01 02:24:28.364 INFO [stderr] 88 |         self.write();
Dec 01 02:24:28.364 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 01 02:24:28.364 INFO [stderr]    |
Dec 01 02:24:28.364 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 02:24:28.364 INFO [stderr] 
Dec 01 02:24:28.616 INFO [stderr] warning: unused `#[macro_use]` import
Dec 01 02:24:28.616 INFO [stderr]   --> src/lib.rs:49:1
Dec 01 02:24:28.616 INFO [stderr]    |
Dec 01 02:24:28.616 INFO [stderr] 49 | #[macro_use]
Dec 01 02:24:28.616 INFO [stderr]    | ^^^^^^^^^^^^
Dec 01 02:24:28.616 INFO [stderr]    |
Dec 01 02:24:28.616 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 01 02:24:28.616 INFO [stderr] 
Dec 01 02:24:28.660 INFO [stderr] warning: method is never used: `clear`
Dec 01 02:24:28.660 INFO [stderr]   --> src/wrapper_structs.rs:54:5
Dec 01 02:24:28.660 INFO [stderr]    |
Dec 01 02:24:28.660 INFO [stderr] 54 |     fn clear(&self) -> io::Result<()> {
Dec 01 02:24:28.660 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 01 02:24:28.660 INFO [stderr]    |
Dec 01 02:24:28.660 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 01 02:24:28.660 INFO [stderr] 
Dec 01 02:24:28.668 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 02:24:28.668 INFO [stderr]   --> src/wrapper_structs.rs:70:9
Dec 01 02:24:28.668 INFO [stderr]    |
Dec 01 02:24:28.668 INFO [stderr] 70 |         f.sync_all();
Dec 01 02:24:28.668 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 01 02:24:28.668 INFO [stderr]    |
Dec 01 02:24:28.668 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 01 02:24:28.668 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 02:24:28.668 INFO [stderr] 
Dec 01 02:24:28.668 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 01 02:24:28.668 INFO [stderr]   --> src/wrapper_structs.rs:88:9
Dec 01 02:24:28.668 INFO [stderr]    |
Dec 01 02:24:28.668 INFO [stderr] 88 |         self.write();
Dec 01 02:24:28.668 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 01 02:24:28.668 INFO [stderr]    |
Dec 01 02:24:28.668 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 01 02:24:28.668 INFO [stderr] 
Dec 01 02:24:29.656 INFO [stderr] warning: variable does not need to be mutable
Dec 01 02:24:29.656 INFO [stderr]   --> test/test.rs:28:17
Dec 01 02:24:29.656 INFO [stderr]    |
Dec 01 02:24:29.656 INFO [stderr] 28 |             let mut current = a.entry(key).or_insert(0);
Dec 01 02:24:29.656 INFO [stderr]    |                 ----^^^^^^^
Dec 01 02:24:29.656 INFO [stderr]    |                 |
Dec 01 02:24:29.656 INFO [stderr]    |                 help: remove this `mut`
Dec 01 02:24:29.656 INFO [stderr]    |
Dec 01 02:24:29.656 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 01 02:24:29.656 INFO [stderr] 
Dec 01 02:24:29.701 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.28s
Dec 01 02:24:29.704 INFO [stderr] su: No module specific data is present
Dec 01 02:24:30.226 INFO running `"docker" "inspect" "35b8e7a80ade08608080bfbfd267a12a0931ca361a7561110d4938223746a51f"`
Dec 01 02:24:30.541 INFO running `"docker" "rm" "-f" "35b8e7a80ade08608080bfbfd267a12a0931ca361a7561110d4938223746a51f"`
Dec 01 02:24:30.915 INFO [stdout] 35b8e7a80ade08608080bfbfd267a12a0931ca361a7561110d4938223746a51f