Dec 12 18:33:30.395 INFO checking acid-state-0.2.3 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 18:33:30.395 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-6/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 12 18:33:30.793 INFO [stdout] 5c77912fe3127098aa67aff55edff70a61a6fcb055d7c166a57800e96978c1d5
Dec 12 18:33:30.808 INFO running `"docker" "start" "-a" "5c77912fe3127098aa67aff55edff70a61a6fcb055d7c166a57800e96978c1d5"`
Dec 12 18:33:31.430 INFO [stderr] usermod: no changes
Dec 12 18:33:31.516 INFO [stderr]     Checking bincode v0.5.9
Dec 12 18:33:32.918 INFO [stderr]     Checking acid-state v0.2.3 (/source)
Dec 12 18:33:33.744 INFO [stderr] warning: unused `#[macro_use]` import
Dec 12 18:33:33.744 INFO [stderr]   --> src/lib.rs:49:1
Dec 12 18:33:33.744 INFO [stderr]    |
Dec 12 18:33:33.744 INFO [stderr] 49 | #[macro_use]
Dec 12 18:33:33.744 INFO [stderr]    | ^^^^^^^^^^^^
Dec 12 18:33:33.744 INFO [stderr]    |
Dec 12 18:33:33.744 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 12 18:33:33.744 INFO [stderr] 
Dec 12 18:33:33.823 INFO [stderr] warning: method is never used: `clear`
Dec 12 18:33:33.824 INFO [stderr]   --> src/wrapper_structs.rs:54:5
Dec 12 18:33:33.824 INFO [stderr]    |
Dec 12 18:33:33.824 INFO [stderr] 54 |     fn clear(&self) -> io::Result<()> {
Dec 12 18:33:33.824 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 18:33:33.824 INFO [stderr]    |
Dec 12 18:33:33.824 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 18:33:33.824 INFO [stderr] 
Dec 12 18:33:33.836 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 18:33:33.837 INFO [stderr]   --> src/wrapper_structs.rs:70:9
Dec 12 18:33:33.837 INFO [stderr]    |
Dec 12 18:33:33.837 INFO [stderr] 70 |         f.sync_all();
Dec 12 18:33:33.837 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 12 18:33:33.837 INFO [stderr]    |
Dec 12 18:33:33.838 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 12 18:33:33.838 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 18:33:33.838 INFO [stderr] 
Dec 12 18:33:33.844 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 18:33:33.844 INFO [stderr]   --> src/wrapper_structs.rs:88:9
Dec 12 18:33:33.844 INFO [stderr]    |
Dec 12 18:33:33.844 INFO [stderr] 88 |         self.write();
Dec 12 18:33:33.844 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 12 18:33:33.844 INFO [stderr]    |
Dec 12 18:33:33.844 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 18:33:33.844 INFO [stderr] 
Dec 12 18:33:34.504 INFO [stderr] warning: unused `#[macro_use]` import
Dec 12 18:33:34.504 INFO [stderr]   --> src/lib.rs:49:1
Dec 12 18:33:34.504 INFO [stderr]    |
Dec 12 18:33:34.504 INFO [stderr] 49 | #[macro_use]
Dec 12 18:33:34.504 INFO [stderr]    | ^^^^^^^^^^^^
Dec 12 18:33:34.504 INFO [stderr]    |
Dec 12 18:33:34.504 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 12 18:33:34.504 INFO [stderr] 
Dec 12 18:33:34.558 INFO [stderr] warning: method is never used: `clear`
Dec 12 18:33:34.558 INFO [stderr]   --> src/wrapper_structs.rs:54:5
Dec 12 18:33:34.558 INFO [stderr]    |
Dec 12 18:33:34.558 INFO [stderr] 54 |     fn clear(&self) -> io::Result<()> {
Dec 12 18:33:34.558 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 18:33:34.558 INFO [stderr]    |
Dec 12 18:33:34.558 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 18:33:34.558 INFO [stderr] 
Dec 12 18:33:34.568 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 18:33:34.568 INFO [stderr]   --> src/wrapper_structs.rs:70:9
Dec 12 18:33:34.568 INFO [stderr]    |
Dec 12 18:33:34.568 INFO [stderr] 70 |         f.sync_all();
Dec 12 18:33:34.568 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 12 18:33:34.568 INFO [stderr]    |
Dec 12 18:33:34.568 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 12 18:33:34.568 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 18:33:34.568 INFO [stderr] 
Dec 12 18:33:34.568 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 18:33:34.568 INFO [stderr]   --> src/wrapper_structs.rs:88:9
Dec 12 18:33:34.568 INFO [stderr]    |
Dec 12 18:33:34.568 INFO [stderr] 88 |         self.write();
Dec 12 18:33:34.568 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 12 18:33:34.568 INFO [stderr]    |
Dec 12 18:33:34.568 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 18:33:34.568 INFO [stderr] 
Dec 12 18:33:35.368 INFO [stderr] warning: variable does not need to be mutable
Dec 12 18:33:35.368 INFO [stderr]   --> test/test.rs:28:17
Dec 12 18:33:35.368 INFO [stderr]    |
Dec 12 18:33:35.368 INFO [stderr] 28 |             let mut current = a.entry(key).or_insert(0);
Dec 12 18:33:35.368 INFO [stderr]    |                 ----^^^^^^^
Dec 12 18:33:35.368 INFO [stderr]    |                 |
Dec 12 18:33:35.368 INFO [stderr]    |                 help: remove this `mut`
Dec 12 18:33:35.368 INFO [stderr]    |
Dec 12 18:33:35.368 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 12 18:33:35.368 INFO [stderr] 
Dec 12 18:33:35.391 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.92s
Dec 12 18:33:35.404 INFO [stderr] su: No module specific data is present
Dec 12 18:33:36.334 INFO running `"docker" "inspect" "5c77912fe3127098aa67aff55edff70a61a6fcb055d7c166a57800e96978c1d5"`
Dec 12 18:33:36.678 INFO running `"docker" "rm" "-f" "5c77912fe3127098aa67aff55edff70a61a6fcb055d7c166a57800e96978c1d5"`
Dec 12 18:33:36.948 INFO [stdout] 5c77912fe3127098aa67aff55edff70a61a6fcb055d7c166a57800e96978c1d5