Dec 12 12:46:47.556 INFO checking ipaddr-0.0.3 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 12:46:47.556 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-0/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 12:46:47.968 INFO [stdout] 15fb0512bc875ce393140f402f4cae5c6c07334ed98af4f502f6482b67478e65
Dec 12 12:46:47.972 INFO running `"docker" "start" "-a" "15fb0512bc875ce393140f402f4cae5c6c07334ed98af4f502f6482b67478e65"`
Dec 12 12:46:49.444 INFO [stderr] usermod: no changes
Dec 12 12:46:49.488 INFO [stderr]     Checking ipaddr v0.0.3 (/source)
Dec 12 12:46:51.660 INFO [stderr] warning: unused variable: `f`
Dec 12 12:46:51.660 INFO [stderr]   --> src/ipv6/network.rs:57:19
Dec 12 12:46:51.660 INFO [stderr]    |
Dec 12 12:46:51.660 INFO [stderr] 57 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
Dec 12 12:46:51.660 INFO [stderr]    |                   ^ help: consider using `_f` instead
Dec 12 12:46:51.660 INFO [stderr]    |
Dec 12 12:46:51.660 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 12 12:46:51.661 INFO [stderr] 
Dec 12 12:46:51.661 INFO [stderr] warning: unused variable: `f`
Dec 12 12:46:51.661 INFO [stderr]   --> src/ipv6/network.rs:63:19
Dec 12 12:46:51.661 INFO [stderr]    |
Dec 12 12:46:51.661 INFO [stderr] 63 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
Dec 12 12:46:51.661 INFO [stderr]    |                   ^ help: consider using `_f` instead
Dec 12 12:46:51.662 INFO [stderr] 
Dec 12 12:46:52.200 INFO [stderr] warning: unused variable: `f`
Dec 12 12:46:52.201 INFO [stderr]   --> src/ipv6/network.rs:57:19
Dec 12 12:46:52.201 INFO [stderr]    |
Dec 12 12:46:52.201 INFO [stderr] 57 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
Dec 12 12:46:52.201 INFO [stderr]    |                   ^ help: consider using `_f` instead
Dec 12 12:46:52.201 INFO [stderr]    |
Dec 12 12:46:52.201 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 12 12:46:52.201 INFO [stderr] 
Dec 12 12:46:52.201 INFO [stderr] warning: unused variable: `f`
Dec 12 12:46:52.201 INFO [stderr]   --> src/ipv6/network.rs:63:19
Dec 12 12:46:52.201 INFO [stderr]    |
Dec 12 12:46:52.201 INFO [stderr] 63 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
Dec 12 12:46:52.201 INFO [stderr]    |                   ^ help: consider using `_f` instead
Dec 12 12:46:52.201 INFO [stderr] 
Dec 12 12:46:52.452 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 12:46:52.452 INFO [stderr]    --> src/ipv6/address/format.rs:451:9
Dec 12 12:46:52.452 INFO [stderr]     |
Dec 12 12:46:52.452 INFO [stderr] 451 | /         ip.formatter(&mut s)
Dec 12 12:46:52.452 INFO [stderr] 452 | |             .upper_case(true)
Dec 12 12:46:52.452 INFO [stderr] 453 | |             .ellipsis(false)
Dec 12 12:46:52.452 INFO [stderr] 454 | |             .write();
Dec 12 12:46:52.452 INFO [stderr]     | |_____________________^
Dec 12 12:46:52.452 INFO [stderr]     |
Dec 12 12:46:52.452 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 12 12:46:52.452 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 12:46:52.452 INFO [stderr] 
Dec 12 12:46:52.548 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.08s
Dec 12 12:46:52.548 INFO [stderr] su: No module specific data is present
Dec 12 12:46:53.882 INFO running `"docker" "inspect" "15fb0512bc875ce393140f402f4cae5c6c07334ed98af4f502f6482b67478e65"`
Dec 12 12:46:54.248 INFO running `"docker" "rm" "-f" "15fb0512bc875ce393140f402f4cae5c6c07334ed98af4f502f6482b67478e65"`
Dec 12 12:46:54.576 INFO [stdout] 15fb0512bc875ce393140f402f4cae5c6c07334ed98af4f502f6482b67478e65