[INFO] updating cached repository Lait-au-Cafe/change_rings
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Lait-au-Cafe/change_rings
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Lait-au-Cafe/change_rings" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/Lait-au-Cafe/change_rings"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/Lait-au-Cafe/change_rings'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Lait-au-Cafe/change_rings" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/Lait-au-Cafe/change_rings"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/Lait-au-Cafe/change_rings'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b1462181ccf067501d21522d55d772035d23379c
[INFO] sha for GitHub repo Lait-au-Cafe/change_rings: b1462181ccf067501d21522d55d772035d23379c
[INFO] validating manifest of Lait-au-Cafe/change_rings on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Lait-au-Cafe/change_rings on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Lait-au-Cafe/change_rings
[INFO] finished frobbing Lait-au-Cafe/change_rings
[INFO] frobbed toml for Lait-au-Cafe/change_rings written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/Lait-au-Cafe/change_rings/Cargo.toml
[INFO] started frobbing Lait-au-Cafe/change_rings
[INFO] finished frobbing Lait-au-Cafe/change_rings
[INFO] frobbed toml for Lait-au-Cafe/change_rings written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/Lait-au-Cafe/change_rings/Cargo.toml
[INFO] crate Lait-au-Cafe/change_rings has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Lait-au-Cafe/change_rings against try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-7/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/Lait-au-Cafe/change_rings:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/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" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 015db02e479b59069672e885790211428e74f6cd22223a5054e6b82acccf9a88
[INFO] running `"docker" "start" "-a" "015db02e479b59069672e885790211428e74f6cd22223a5054e6b82acccf9a88"`
[INFO] [stderr]     Checking libc v0.2.33
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking aho-corasick v0.6.3
[INFO] [stderr]     Checking regex v0.2.2
[INFO] [stderr]     Checking change_rings v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `display`
[INFO] [stderr]   --> src/node.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn display(node_list: NodeList) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `display2`
[INFO] [stderr]   --> src/node.rs:61:1
[INFO] [stderr]    |
[INFO] [stderr] 61 | / pub fn display2(
[INFO] [stderr] 62 | |     node_list: &NodeList, 
[INFO] [stderr] 63 | |     n: usize
[INFO] [stderr] 64 | | ) {
[INFO] [stderr] ...  |
[INFO] [stderr] 84 | |     }
[INFO] [stderr] 85 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `display`
[INFO] [stderr]   --> src/node.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn display(node_list: NodeList) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `display2`
[INFO] [stderr]   --> src/node.rs:61:1
[INFO] [stderr]    |
[INFO] [stderr] 61 | / pub fn display2(
[INFO] [stderr] 62 | |     node_list: &NodeList, 
[INFO] [stderr] 63 | |     n: usize
[INFO] [stderr] 64 | | ) {
[INFO] [stderr] ...  |
[INFO] [stderr] 84 | |     }
[INFO] [stderr] 85 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.15s
[INFO] running `"docker" "inspect" "015db02e479b59069672e885790211428e74f6cd22223a5054e6b82acccf9a88"`
[INFO] running `"docker" "rm" "-f" "015db02e479b59069672e885790211428e74f6cd22223a5054e6b82acccf9a88"`
[INFO] [stdout] 015db02e479b59069672e885790211428e74f6cd22223a5054e6b82acccf9a88