Dec 12 17:47:45.162 INFO checking balloon-0.0.1 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 17:47:45.162 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/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 17:47:45.588 INFO [stdout] 1118105c11463078672cac45c763d11aaaa618d9102dcf9f4443d3e9eef907b2
Dec 12 17:47:45.588 INFO running `"docker" "start" "-a" "1118105c11463078672cac45c763d11aaaa618d9102dcf9f4443d3e9eef907b2"`
Dec 12 17:47:46.927 INFO [stderr] usermod: no changes
Dec 12 17:47:47.056 INFO [stderr]     Checking subtle v0.7.1
Dec 12 17:47:47.583 INFO [stderr]     Checking balloon v0.0.1 (/source)
Dec 12 17:47:49.000 INFO [stderr] warning: method is never used: `get`
Dec 12 17:47:49.000 INFO [stderr]   --> src/buffer.rs:51:5
Dec 12 17:47:49.000 INFO [stderr]    |
Dec 12 17:47:49.000 INFO [stderr] 51 |     pub fn get(&self, index: usize) -> Option<&T> { self.back.get(index) }
Dec 12 17:47:49.000 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:47:49.000 INFO [stderr]    |
Dec 12 17:47:49.000 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 17:47:49.000 INFO [stderr] 
Dec 12 17:47:49.000 INFO [stderr] warning: method is never used: `get_mut`
Dec 12 17:47:49.000 INFO [stderr]   --> src/buffer.rs:54:5
Dec 12 17:47:49.000 INFO [stderr]    |
Dec 12 17:47:49.000 INFO [stderr] 54 |     pub fn get_mut(&mut self, index: usize) -> Option<&mut T> { self.back.get_mut(index) }
Dec 12 17:47:49.000 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:47:49.000 INFO [stderr] 
Dec 12 17:47:49.000 INFO [stderr] warning: method is never used: `clear`
Dec 12 17:47:49.000 INFO [stderr]   --> src/buffer.rs:57:5
Dec 12 17:47:49.000 INFO [stderr]    |
Dec 12 17:47:49.000 INFO [stderr] 57 |     pub fn clear(&mut self) { self.back.clear() }
Dec 12 17:47:49.000 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:47:49.000 INFO [stderr] 
Dec 12 17:47:49.000 INFO [stderr] warning: method is never used: `is_empty`
Dec 12 17:47:49.001 INFO [stderr]   --> src/buffer.rs:58:5
Dec 12 17:47:49.001 INFO [stderr]    |
Dec 12 17:47:49.001 INFO [stderr] 58 |     pub fn is_empty(&self) -> bool { self.back.is_empty() }
Dec 12 17:47:49.001 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:47:49.001 INFO [stderr] 
Dec 12 17:47:49.001 INFO [stderr] warning: method is never used: `len`
Dec 12 17:47:49.001 INFO [stderr]   --> src/buffer.rs:59:5
Dec 12 17:47:49.001 INFO [stderr]    |
Dec 12 17:47:49.001 INFO [stderr] 59 |     pub fn len(&self) -> usize { self.back.len() }
Dec 12 17:47:49.001 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:47:49.001 INFO [stderr] 
Dec 12 17:47:49.200 INFO [stderr] warning: method is never used: `get`
Dec 12 17:47:49.200 INFO [stderr]   --> src/buffer.rs:51:5
Dec 12 17:47:49.200 INFO [stderr]    |
Dec 12 17:47:49.200 INFO [stderr] 51 |     pub fn get(&self, index: usize) -> Option<&T> { self.back.get(index) }
Dec 12 17:47:49.200 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:47:49.200 INFO [stderr]    |
Dec 12 17:47:49.200 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 17:47:49.200 INFO [stderr] 
Dec 12 17:47:49.200 INFO [stderr] warning: method is never used: `get_mut`
Dec 12 17:47:49.200 INFO [stderr]   --> src/buffer.rs:54:5
Dec 12 17:47:49.200 INFO [stderr]    |
Dec 12 17:47:49.200 INFO [stderr] 54 |     pub fn get_mut(&mut self, index: usize) -> Option<&mut T> { self.back.get_mut(index) }
Dec 12 17:47:49.200 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:47:49.200 INFO [stderr] 
Dec 12 17:47:49.200 INFO [stderr] warning: method is never used: `clear`
Dec 12 17:47:49.200 INFO [stderr]   --> src/buffer.rs:57:5
Dec 12 17:47:49.200 INFO [stderr]    |
Dec 12 17:47:49.200 INFO [stderr] 57 |     pub fn clear(&mut self) { self.back.clear() }
Dec 12 17:47:49.200 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:47:49.200 INFO [stderr] 
Dec 12 17:47:49.200 INFO [stderr] warning: method is never used: `is_empty`
Dec 12 17:47:49.200 INFO [stderr]   --> src/buffer.rs:58:5
Dec 12 17:47:49.200 INFO [stderr]    |
Dec 12 17:47:49.200 INFO [stderr] 58 |     pub fn is_empty(&self) -> bool { self.back.is_empty() }
Dec 12 17:47:49.200 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:47:49.200 INFO [stderr] 
Dec 12 17:47:49.200 INFO [stderr] warning: method is never used: `len`
Dec 12 17:47:49.200 INFO [stderr]   --> src/buffer.rs:59:5
Dec 12 17:47:49.200 INFO [stderr]    |
Dec 12 17:47:49.200 INFO [stderr] 59 |     pub fn len(&self) -> usize { self.back.len() }
Dec 12 17:47:49.200 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 17:47:49.200 INFO [stderr] 
Dec 12 17:47:49.230 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.27s
Dec 12 17:47:49.232 INFO [stderr] su: No module specific data is present
Dec 12 17:47:49.494 INFO running `"docker" "inspect" "1118105c11463078672cac45c763d11aaaa618d9102dcf9f4443d3e9eef907b2"`
Dec 12 17:47:49.592 INFO running `"docker" "rm" "-f" "1118105c11463078672cac45c763d11aaaa618d9102dcf9f4443d3e9eef907b2"`
Dec 12 17:47:49.688 INFO [stdout] 1118105c11463078672cac45c763d11aaaa618d9102dcf9f4443d3e9eef907b2