Dec 15 23:19:22.237 INFO testing acid-state-0.2.3 against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 15 23:19:22.237 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt build --frozen" "-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 15 23:19:22.394 INFO [stdout] effc991ec1b319a1b4c43912efad8fbdf8f93b5947e7f4d942fe834def03744e
Dec 15 23:19:22.396 INFO running `"docker" "start" "-a" "effc991ec1b319a1b4c43912efad8fbdf8f93b5947e7f4d942fe834def03744e"`
Dec 15 23:19:23.065 INFO [stderr] usermod: no changes
Dec 15 23:19:23.122 INFO [stderr]    Compiling acid-state v0.2.3 (/source)
Dec 15 23:19:23.999 INFO [stderr] warning: unused `#[macro_use]` import
Dec 15 23:19:23.999 INFO [stderr]   --> src/lib.rs:49:1
Dec 15 23:19:23.999 INFO [stderr]    |
Dec 15 23:19:23.999 INFO [stderr] 49 | #[macro_use]
Dec 15 23:19:23.999 INFO [stderr]    | ^^^^^^^^^^^^
Dec 15 23:19:23.999 INFO [stderr]    |
Dec 15 23:19:23.999 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 15 23:19:23.999 INFO [stderr] 
Dec 15 23:19:24.055 INFO [stderr] warning: method is never used: `clear`
Dec 15 23:19:24.055 INFO [stderr]   --> src/wrapper_structs.rs:54:5
Dec 15 23:19:24.055 INFO [stderr]    |
Dec 15 23:19:24.055 INFO [stderr] 54 |     fn clear(&self) -> io::Result<()> {
Dec 15 23:19:24.055 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 23:19:24.055 INFO [stderr]    |
Dec 15 23:19:24.055 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 15 23:19:24.055 INFO [stderr] 
Dec 15 23:19:24.064 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 23:19:24.064 INFO [stderr]   --> src/wrapper_structs.rs:70:9
Dec 15 23:19:24.064 INFO [stderr]    |
Dec 15 23:19:24.064 INFO [stderr] 70 |         f.sync_all();
Dec 15 23:19:24.064 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 15 23:19:24.064 INFO [stderr]    |
Dec 15 23:19:24.064 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 15 23:19:24.064 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 23:19:24.064 INFO [stderr] 
Dec 15 23:19:24.064 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 23:19:24.064 INFO [stderr]   --> src/wrapper_structs.rs:88:9
Dec 15 23:19:24.064 INFO [stderr]    |
Dec 15 23:19:24.064 INFO [stderr] 88 |         self.write();
Dec 15 23:19:24.064 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 15 23:19:24.064 INFO [stderr]    |
Dec 15 23:19:24.064 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 23:19:24.064 INFO [stderr] 
Dec 15 23:19:24.087 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
Dec 15 23:19:24.087 INFO [stderr] su: No module specific data is present
Dec 15 23:19:24.392 INFO running `"docker" "inspect" "effc991ec1b319a1b4c43912efad8fbdf8f93b5947e7f4d942fe834def03744e"`
Dec 15 23:19:24.510 INFO running `"docker" "rm" "-f" "effc991ec1b319a1b4c43912efad8fbdf8f93b5947e7f4d942fe834def03744e"`
Dec 15 23:19:24.574 INFO [stdout] effc991ec1b319a1b4c43912efad8fbdf8f93b5947e7f4d942fe834def03744e
Dec 15 23:19:24.576 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt test --frozen --no-run" "-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 15 23:19:24.818 INFO [stdout] 0dddb0e64606861ef32f8ca609c06e6134bd808e9c4d29f88521a0eff480dfd7
Dec 15 23:19:24.820 INFO running `"docker" "start" "-a" "0dddb0e64606861ef32f8ca609c06e6134bd808e9c4d29f88521a0eff480dfd7"`
Dec 15 23:19:25.348 INFO [stderr] usermod: no changes
Dec 15 23:19:25.381 INFO [stderr]    Compiling acid-state v0.2.3 (/source)
Dec 15 23:19:26.495 INFO [stderr] warning: unused `#[macro_use]` import
Dec 15 23:19:26.495 INFO [stderr]   --> src/lib.rs:49:1
Dec 15 23:19:26.495 INFO [stderr]    |
Dec 15 23:19:26.495 INFO [stderr] 49 | #[macro_use]
Dec 15 23:19:26.495 INFO [stderr]    | ^^^^^^^^^^^^
Dec 15 23:19:26.495 INFO [stderr]    |
Dec 15 23:19:26.495 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 15 23:19:26.495 INFO [stderr] 
Dec 15 23:19:26.543 INFO [stderr] warning: method is never used: `clear`
Dec 15 23:19:26.543 INFO [stderr]   --> src/wrapper_structs.rs:54:5
Dec 15 23:19:26.543 INFO [stderr]    |
Dec 15 23:19:26.543 INFO [stderr] 54 |     fn clear(&self) -> io::Result<()> {
Dec 15 23:19:26.543 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 15 23:19:26.543 INFO [stderr]    |
Dec 15 23:19:26.543 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 15 23:19:26.543 INFO [stderr] 
Dec 15 23:19:26.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 23:19:26.559 INFO [stderr]   --> src/wrapper_structs.rs:70:9
Dec 15 23:19:26.559 INFO [stderr]    |
Dec 15 23:19:26.559 INFO [stderr] 70 |         f.sync_all();
Dec 15 23:19:26.559 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 15 23:19:26.559 INFO [stderr]    |
Dec 15 23:19:26.559 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 15 23:19:26.559 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 23:19:26.559 INFO [stderr] 
Dec 15 23:19:26.559 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 15 23:19:26.559 INFO [stderr]   --> src/wrapper_structs.rs:88:9
Dec 15 23:19:26.559 INFO [stderr]    |
Dec 15 23:19:26.559 INFO [stderr] 88 |         self.write();
Dec 15 23:19:26.559 INFO [stderr]    |         ^^^^^^^^^^^^^
Dec 15 23:19:26.559 INFO [stderr]    |
Dec 15 23:19:26.559 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 15 23:19:26.559 INFO [stderr] 
Dec 15 23:19:26.835 INFO [stderr] warning: variable does not need to be mutable
Dec 15 23:19:26.835 INFO [stderr]   --> test/test.rs:28:17
Dec 15 23:19:26.835 INFO [stderr]    |
Dec 15 23:19:26.835 INFO [stderr] 28 |             let mut current = a.entry(key).or_insert(0);
Dec 15 23:19:26.835 INFO [stderr]    |                 ----^^^^^^^
Dec 15 23:19:26.835 INFO [stderr]    |                 |
Dec 15 23:19:26.835 INFO [stderr]    |                 help: remove this `mut`
Dec 15 23:19:26.835 INFO [stderr]    |
Dec 15 23:19:26.835 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 15 23:19:26.835 INFO [stderr] 
Dec 15 23:19:27.578 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.21s
Dec 15 23:19:27.583 INFO [stderr] su: No module specific data is present
Dec 15 23:19:27.865 INFO running `"docker" "inspect" "0dddb0e64606861ef32f8ca609c06e6134bd808e9c4d29f88521a0eff480dfd7"`
Dec 15 23:19:27.973 INFO running `"docker" "rm" "-f" "0dddb0e64606861ef32f8ca609c06e6134bd808e9c4d29f88521a0eff480dfd7"`
Dec 15 23:19:28.074 INFO [stdout] 0dddb0e64606861ef32f8ca609c06e6134bd808e9c4d29f88521a0eff480dfd7