[INFO] updating cached repository mtn/ent
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mtn/ent
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mtn/ent" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/mtn/ent"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/mtn/ent'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mtn/ent" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/mtn/ent"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/mtn/ent'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 95095681810c18df76a18f11eff44fb9bfbd0d4f
[INFO] sha for GitHub repo mtn/ent: 95095681810c18df76a18f11eff44fb9bfbd0d4f
[INFO] validating manifest of mtn/ent 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 mtn/ent 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 mtn/ent
[INFO] finished frobbing mtn/ent
[INFO] frobbed toml for mtn/ent written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/mtn/ent/Cargo.toml
[INFO] started frobbing mtn/ent
[INFO] finished frobbing mtn/ent
[INFO] frobbed toml for mtn/ent written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/mtn/ent/Cargo.toml
[INFO] crate mtn/ent 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 mtn/ent against master#f66e4697ae286985ddefc53c3a047614568458bb for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-0/master#f66e4697ae286985ddefc53c3a047614568458bb:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/mtn/ent:/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" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 766ac1be213a80356689c21421a717caf8c6cac92c7b037cc48c18971af7eef9
[INFO] running `"docker" "start" "-a" "766ac1be213a80356689c21421a717caf8c6cac92c7b037cc48c18971af7eef9"`
[INFO] [stderr]     Checking ent v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut in_str = "A ~B ~C DE\nC D ~E";
[INFO] [stderr]   |         ----^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `update_watchlist`
[INFO] [stderr]   --> src/watchlist.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / fn update_watchlist<'a> (sat_instance: &'a IR, watchlist: &'a mut Watchlist<'a>,
[INFO] [stderr] 25 | |                          false_literal: Variable, assignments: Vec<Option<bool>>,
[INFO] [stderr] 26 | |                          verbose: bool) -> bool {
[INFO] [stderr] 27 | |     // When X is made false, everything watching X needs to watch something else
[INFO] [stderr] ...  |
[INFO] [stderr] 66 | |     return true
[INFO] [stderr] 67 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/main.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut in_str = "A ~B ~C DE\nC D ~E";
[INFO] [stderr]   |         ----^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `update_watchlist`
[INFO] [stderr]   --> src/watchlist.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / fn update_watchlist<'a> (sat_instance: &'a IR, watchlist: &'a mut Watchlist<'a>,
[INFO] [stderr] 25 | |                          false_literal: Variable, assignments: Vec<Option<bool>>,
[INFO] [stderr] 26 | |                          verbose: bool) -> bool {
[INFO] [stderr] 27 | |     // When X is made false, everything watching X needs to watch something else
[INFO] [stderr] ...  |
[INFO] [stderr] 66 | |     return true
[INFO] [stderr] 67 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `"docker" "inspect" "766ac1be213a80356689c21421a717caf8c6cac92c7b037cc48c18971af7eef9"`
[INFO] running `"docker" "rm" "-f" "766ac1be213a80356689c21421a717caf8c6cac92c7b037cc48c18971af7eef9"`
[INFO] [stdout] 766ac1be213a80356689c21421a717caf8c6cac92c7b037cc48c18971af7eef9