[INFO] cloning repository https://github.com/pyelias/sudoku [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pyelias/sudoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpyelias%2Fsudoku", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpyelias%2Fsudoku'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] adba60a5219aeaa77b9af1cc30673043312b8d90 [INFO] checking pyelias/sudoku against try#23ffd2897cbb44320ca18dfe4d05dbacb37d55e0 for pr-115950 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpyelias%2Fsudoku" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/pyelias/sudoku on toolchain 23ffd2897cbb44320ca18dfe4d05dbacb37d55e0 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/pyelias/sudoku [INFO] finished tweaking git repo https://github.com/pyelias/sudoku [INFO] tweaked toml for git repo https://github.com/pyelias/sudoku written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/pyelias/sudoku 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" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ec3b1c6f3a2f6aba2f3c1b6adfde3175269333070cdd02f7f72a29e89e2f687c [INFO] running `Command { std: "docker" "start" "-a" "ec3b1c6f3a2f6aba2f3c1b6adfde3175269333070cdd02f7f72a29e89e2f687c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ec3b1c6f3a2f6aba2f3c1b6adfde3175269333070cdd02f7f72a29e89e2f687c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ec3b1c6f3a2f6aba2f3c1b6adfde3175269333070cdd02f7f72a29e89e2f687c", kill_on_drop: false }` [INFO] [stdout] ec3b1c6f3a2f6aba2f3c1b6adfde3175269333070cdd02f7f72a29e89e2f687c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7122dbdb0755629410498bb964aca7105d5d4e721fcbc15241784f00e413c0c0 [INFO] running `Command { std: "docker" "start" "-a" "7122dbdb0755629410498bb964aca7105d5d4e721fcbc15241784f00e413c0c0", kill_on_drop: false }` [INFO] [stderr] Checking sudoku v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0502]: cannot borrow `board` as immutable because it is also borrowed as mutable [INFO] [stdout] --> src/sudoku/solve.rs:200:31 [INFO] [stdout] | [INFO] [stdout] 199 | for update in board.take_updates() { [INFO] [stdout] | -------------------- [INFO] [stdout] | | [INFO] [stdout] | mutable borrow occurs here [INFO] [stdout] | a temporary with access to the mutable borrow is created here ... [INFO] [stdout] 200 | let mut allowed = board.allowed(update); [INFO] [stdout] | ^^^^^ immutable borrow occurs here [INFO] [stdout] ... [INFO] [stdout] 207 | } [INFO] [stdout] | - ... and the mutable borrow might be used here, when that temporary is dropped and runs the destructor for type `impl Iterator` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `board` as immutable because it is also borrowed as mutable [INFO] [stdout] --> src/sudoku/solve.rs:200:31 [INFO] [stdout] | [INFO] [stdout] 199 | for update in board.take_updates() { [INFO] [stdout] | -------------------- [INFO] [stdout] | | [INFO] [stdout] | mutable borrow occurs here [INFO] [stdout] | a temporary with access to the mutable borrow is created here ... [INFO] [stdout] 200 | let mut allowed = board.allowed(update); [INFO] [stdout] | ^^^^^ immutable borrow occurs here [INFO] [stdout] ... [INFO] [stdout] 207 | } [INFO] [stdout] | - ... and the mutable borrow might be used here, when that temporary is dropped and runs the destructor for type `impl Iterator` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0499]: cannot borrow `board` as mutable more than once at a time [INFO] [stdout] --> src/sudoku/solve.rs:205:17 [INFO] [stdout] | [INFO] [stdout] 199 | for update in board.take_updates() { [INFO] [stdout] | -------------------- [INFO] [stdout] | | [INFO] [stdout] | first mutable borrow occurs here [INFO] [stdout] | first borrow later used here [INFO] [stdout] ... [INFO] [stdout] 205 | board.fill(update, num); [INFO] [stdout] | ^^^^^ second mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0499]: cannot borrow `board` as mutable more than once at a time [INFO] [stdout] --> src/sudoku/solve.rs:205:17 [INFO] [stdout] | [INFO] [stdout] 199 | for update in board.take_updates() { [INFO] [stdout] | -------------------- [INFO] [stdout] | | [INFO] [stdout] | first mutable borrow occurs here [INFO] [stdout] | first borrow later used here [INFO] [stdout] ... [INFO] [stdout] 205 | board.fill(update, num); [INFO] [stdout] | ^^^^^ second mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0499, E0502. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0499`. [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0499, E0502. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0499`. [INFO] [stdout] [INFO] [stderr] error: could not compile `sudoku` (bin "sudoku") due to 3 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `sudoku` (bin "sudoku" test) due to 3 previous errors [INFO] running `Command { std: "docker" "inspect" "7122dbdb0755629410498bb964aca7105d5d4e721fcbc15241784f00e413c0c0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7122dbdb0755629410498bb964aca7105d5d4e721fcbc15241784f00e413c0c0", kill_on_drop: false }` [INFO] [stdout] 7122dbdb0755629410498bb964aca7105d5d4e721fcbc15241784f00e413c0c0