[INFO] fetching crate minefield-rs 0.1.5... [INFO] checking minefield-rs-0.1.5 against try#23ffd2897cbb44320ca18dfe4d05dbacb37d55e0 for pr-115950 [INFO] extracting crate minefield-rs 0.1.5 into /workspace/builds/worker-3-tc2/source [INFO] validating manifest of crates.io crate minefield-rs 0.1.5 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 crates.io crate minefield-rs 0.1.5 [INFO] finished tweaking crates.io crate minefield-rs 0.1.5 [INFO] tweaked toml for crates.io crate minefield-rs 0.1.5 written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] fa05c7023797e4a5e4a56bc19b203c3473f5ca5cfb6b8d6787364ea11fcb9972 [INFO] running `Command { std: "docker" "start" "-a" "fa05c7023797e4a5e4a56bc19b203c3473f5ca5cfb6b8d6787364ea11fcb9972", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "fa05c7023797e4a5e4a56bc19b203c3473f5ca5cfb6b8d6787364ea11fcb9972", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "fa05c7023797e4a5e4a56bc19b203c3473f5ca5cfb6b8d6787364ea11fcb9972", kill_on_drop: false }` [INFO] [stdout] fa05c7023797e4a5e4a56bc19b203c3473f5ca5cfb6b8d6787364ea11fcb9972 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 33bc13f5f6d3c1d69bf21f58a446f86416bb6f1b5f42b13b80f2f4172263d853 [INFO] running `Command { std: "docker" "start" "-a" "33bc13f5f6d3c1d69bf21f58a446f86416bb6f1b5f42b13b80f2f4172263d853", kill_on_drop: false }` [INFO] [stderr] Checking minefield-rs v0.1.5 (/opt/rustwide/workdir) [INFO] [stdout] error[E0502]: cannot borrow `self.field` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/lib.rs:90:36 [INFO] [stdout] | [INFO] [stdout] 89 | for n_coords in self.neighbors_coords(xx, yy) { [INFO] [stdout] | ----------------------------- [INFO] [stdout] | | [INFO] [stdout] | immutable borrow occurs here [INFO] [stdout] | immutable borrow later used here [INFO] [stdout] 90 | let spot = self.field.get_mut(&n_coords).unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/lib.rs:132:48 [INFO] [stdout] | [INFO] [stdout] 131 | for (nx, ny) in self.neighbors_coords(x, y) { [INFO] [stdout] | --------------------------- [INFO] [stdout] | | [INFO] [stdout] | immutable borrow occurs here [INFO] [stdout] | a temporary with access to the immutable borrow is created here ... [INFO] [stdout] 132 | if StepResult::Boom == self.step(nx, ny) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] ... [INFO] [stdout] 136 | } [INFO] [stdout] | - ... and the immutable 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 `self.field` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/lib.rs:216:45 [INFO] [stdout] | [INFO] [stdout] 215 | for (nx, ny) in self.neighbors_coords(x, y) { [INFO] [stdout] | --------------------------- [INFO] [stdout] | | [INFO] [stdout] | immutable borrow occurs here [INFO] [stdout] | immutable borrow later used here [INFO] [stdout] 216 | if let Some(spot) = self.field.get_mut(&(nx, ny)) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 3 previous errors [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0502`. [INFO] [stdout] [INFO] [stderr] error: could not compile `minefield-rs` (lib) due to 4 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] error[E0502]: cannot borrow `self.field` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/lib.rs:90:36 [INFO] [stdout] | [INFO] [stdout] 89 | for n_coords in self.neighbors_coords(xx, yy) { [INFO] [stdout] | ----------------------------- [INFO] [stdout] | | [INFO] [stdout] | immutable borrow occurs here [INFO] [stdout] | immutable borrow later used here [INFO] [stdout] 90 | let spot = self.field.get_mut(&n_coords).unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/lib.rs:132:48 [INFO] [stdout] | [INFO] [stdout] 131 | for (nx, ny) in self.neighbors_coords(x, y) { [INFO] [stdout] | --------------------------- [INFO] [stdout] | | [INFO] [stdout] | immutable borrow occurs here [INFO] [stdout] | a temporary with access to the immutable borrow is created here ... [INFO] [stdout] 132 | if StepResult::Boom == self.step(nx, ny) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] ... [INFO] [stdout] 136 | } [INFO] [stdout] | - ... and the immutable 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 `self.field` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/lib.rs:216:45 [INFO] [stdout] | [INFO] [stdout] 215 | for (nx, ny) in self.neighbors_coords(x, y) { [INFO] [stdout] | --------------------------- [INFO] [stdout] | | [INFO] [stdout] | immutable borrow occurs here [INFO] [stdout] | immutable borrow later used here [INFO] [stdout] 216 | if let Some(spot) = self.field.get_mut(&(nx, ny)) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 3 previous errors [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0502`. [INFO] [stdout] [INFO] [stderr] error: could not compile `minefield-rs` (lib test) due to 4 previous errors [INFO] running `Command { std: "docker" "inspect" "33bc13f5f6d3c1d69bf21f58a446f86416bb6f1b5f42b13b80f2f4172263d853", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "33bc13f5f6d3c1d69bf21f58a446f86416bb6f1b5f42b13b80f2f4172263d853", kill_on_drop: false }` [INFO] [stdout] 33bc13f5f6d3c1d69bf21f58a446f86416bb6f1b5f42b13b80f2f4172263d853