[INFO] cloning repository https://github.com/VKianV/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VKianV/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVKianV%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVKianV%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 343d05c477cd12eed5ac7a244625b52a1ad29b48
[INFO] checking VKianV/rust-playground against 3154cc1a3e6424e44f438a95007d043ed5ceaaf6+rustflags=-Znext-solver=coherence for pr-133502-30
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVKianV%2Frust-playground" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/VKianV/rust-playground
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/VKianV/rust-playground
[INFO] tweaked toml for git repo https://github.com/VKianV/rust-playground written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/VKianV/rust-playground on toolchain 3154cc1a3e6424e44f438a95007d043ed5ceaaf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/VKianV/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] d783afc0c00694f9b0bf545415fa8e93f56abee1e680f8f5367d2229855d0b5b
[INFO] running `Command { std: "docker" "start" "d783afc0c00694f9b0bf545415fa8e93f56abee1e680f8f5367d2229855d0b5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d783afc0c00694f9b0bf545415fa8e93f56abee1e680f8f5367d2229855d0b5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d783afc0c00694f9b0bf545415fa8e93f56abee1e680f8f5367d2229855d0b5b" "/opt/rustwide/cargo-home/bin/cargo" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d783afc0c00694f9b0bf545415fa8e93f56abee1e680f8f5367d2229855d0b5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Znext-solver=coherence" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d783afc0c00694f9b0bf545415fa8e93f56abee1e680f8f5367d2229855d0b5b" "/opt/rustwide/cargo-home/bin/cargo" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `slice`
[INFO] [stdout]  --> src/temp.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     slice, vec,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slice`
[INFO] [stdout]  --> src/temp.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     slice, vec,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/temp.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |       fn into_iter(self) -> Self::IntoIter {
[INFO] [stdout]     |                             -------------- expected `Flatten<std::vec::IntoIter<Option<T>>>` because of return type
[INFO] [stdout] 246 | /         self.data
[INFO] [stdout] 247 | |             .into_iter()
[INFO] [stdout] 248 | |             .map(|slot| match slot {
[INFO] [stdout] 249 | |                 Slot::Occupied { value, .. } => Some(value),
[INFO] [stdout] 250 | |                 _ => None,
[INFO] [stdout] 251 | |             })
[INFO] [stdout] 252 | |             .flatten()
[INFO] [stdout]     | |______________________^ expected `Flatten<IntoIter<Option<T>>>`, found `Flatten<Map<_, {closure@...}>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Flatten<IntoIter<Option<T>>>`
[INFO] [stdout]                found struct `Flatten<Map<IntoIter<temp::Slot<T>>, {closure@src/temp.rs:248:18: 248:24}>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_playground` (lib test) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/temp.rs:246:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |       fn into_iter(self) -> Self::IntoIter {
[INFO] [stdout]     |                             -------------- expected `Flatten<std::vec::IntoIter<Option<T>>>` because of return type
[INFO] [stdout] 246 | /         self.data
[INFO] [stdout] 247 | |             .into_iter()
[INFO] [stdout] 248 | |             .map(|slot| match slot {
[INFO] [stdout] 249 | |                 Slot::Occupied { value, .. } => Some(value),
[INFO] [stdout] 250 | |                 _ => None,
[INFO] [stdout] 251 | |             })
[INFO] [stdout] 252 | |             .flatten()
[INFO] [stdout]     | |______________________^ expected `Flatten<IntoIter<Option<T>>>`, found `Flatten<Map<_, {closure@...}>>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected struct `Flatten<IntoIter<Option<T>>>`
[INFO] [stdout]                found struct `Flatten<Map<IntoIter<temp::Slot<T>>, {closure@src/temp.rs:248:18: 248:24}>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_playground` (lib) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "d783afc0c00694f9b0bf545415fa8e93f56abee1e680f8f5367d2229855d0b5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d783afc0c00694f9b0bf545415fa8e93f56abee1e680f8f5367d2229855d0b5b", kill_on_drop: false }`
[INFO] [stdout] d783afc0c00694f9b0bf545415fa8e93f56abee1e680f8f5367d2229855d0b5b
