[INFO] updating cached repository owlinux1000/rust-comet2
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/owlinux1000/rust-comet2
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/owlinux1000/rust-comet2" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/owlinux1000/rust-comet2"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/owlinux1000/rust-comet2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/owlinux1000/rust-comet2" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/owlinux1000/rust-comet2"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/owlinux1000/rust-comet2'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5aa5b2ad2418ba5fe198e25db8fa06023dd11129
[INFO] sha for GitHub repo owlinux1000/rust-comet2: 5aa5b2ad2418ba5fe198e25db8fa06023dd11129
[INFO] validating manifest of owlinux1000/rust-comet2 on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of owlinux1000/rust-comet2 on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing owlinux1000/rust-comet2
[INFO] finished frobbing owlinux1000/rust-comet2
[INFO] frobbed toml for owlinux1000/rust-comet2 written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/owlinux1000/rust-comet2/Cargo.toml
[INFO] started frobbing owlinux1000/rust-comet2
[INFO] finished frobbing owlinux1000/rust-comet2
[INFO] frobbed toml for owlinux1000/rust-comet2 written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/owlinux1000/rust-comet2/Cargo.toml
[INFO] crate owlinux1000/rust-comet2 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking owlinux1000/rust-comet2 against master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-0/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/owlinux1000/rust-comet2:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c1c91442bf91d4d3312c05befdb8e676839192aec64ff9a1f4c8007548dd9142
[INFO] running `"docker" "start" "-a" "c1c91442bf91d4d3312c05befdb8e676839192aec64ff9a1f4c8007548dd9142"`
[INFO] [stderr]     Checking getopts v0.2.15
[INFO] [stderr]     Checking libc v0.2.35
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.15/src/lib.rs:1033:33
[INFO] [stderr]      |
[INFO] [stderr] 978  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]      |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 982  |         state = match (state, whitespace, limit) {
[INFO] [stderr]      |         ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 1033 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]      |                                 ^ use of borrowed `state`
[INFO] [stderr] 1034 |         machine(&mut cont, (fake_i, ' '));
[INFO] [stderr]      |         ------- borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]      = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]     Checking rust-comet2 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Fr`
[INFO] [stderr]  --> src/hardware.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct Fr {
[INFO] [stderr]   | ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/hardware.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn new() -> Fr {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set`
[INFO] [stderr]   --> src/hardware.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn set(&mut self, i: u8, f: bool) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_all`
[INFO] [stderr]   --> src/hardware.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn get_all(&self) -> [bool; 3] {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/hardware.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn get(&self, i: u8) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Fr`
[INFO] [stderr]  --> src/hardware.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct Fr {
[INFO] [stderr]   | ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/hardware.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     pub fn new() -> Fr {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set`
[INFO] [stderr]   --> src/hardware.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn set(&mut self, i: u8, f: bool) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_all`
[INFO] [stderr]   --> src/hardware.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn get_all(&self) -> [bool; 3] {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/hardware.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn get(&self, i: u8) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.80s
[INFO] running `"docker" "inspect" "c1c91442bf91d4d3312c05befdb8e676839192aec64ff9a1f4c8007548dd9142"`
[INFO] running `"docker" "rm" "-f" "c1c91442bf91d4d3312c05befdb8e676839192aec64ff9a1f4c8007548dd9142"`
[INFO] [stdout] c1c91442bf91d4d3312c05befdb8e676839192aec64ff9a1f4c8007548dd9142