[INFO] cloning repository https://github.com/drewwyatt/card-flipping [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/drewwyatt/card-flipping" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrewwyatt%2Fcard-flipping", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrewwyatt%2Fcard-flipping'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 2269809d6924662b35097afb72a5f96a637a326c [INFO] checking drewwyatt/card-flipping against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrewwyatt%2Fcard-flipping" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/drewwyatt/card-flipping [INFO] finished tweaking git repo https://github.com/drewwyatt/card-flipping [INFO] tweaked toml for git repo https://github.com/drewwyatt/card-flipping written to /workspace/builds/worker-0-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/drewwyatt/card-flipping on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/drewwyatt/card-flipping 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 4401f0c53bbfac6c29fabb3316838343ba333a9a1bf65af5b23ab1bcc5f2b95b [INFO] running `Command { std: "docker" "start" "-a" "4401f0c53bbfac6c29fabb3316838343ba333a9a1bf65af5b23ab1bcc5f2b95b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "4401f0c53bbfac6c29fabb3316838343ba333a9a1bf65af5b23ab1bcc5f2b95b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4401f0c53bbfac6c29fabb3316838343ba333a9a1bf65af5b23ab1bcc5f2b95b", kill_on_drop: false }` [INFO] [stdout] 4401f0c53bbfac6c29fabb3316838343ba333a9a1bf65af5b23ab1bcc5f2b95b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9446534610ec56505856b964b45482693a4386ee8fc1d69a95591f97354e7c27 [INFO] running `Command { std: "docker" "start" "-a" "9446534610ec56505856b964b45482693a4386ee8fc1d69a95591f97354e7c27", kill_on_drop: false }` [INFO] [stderr] Checking card-flipping v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: found module declaration for lib.rs [INFO] [stdout] --> src/main.rs:1:1 [INFO] [stdout] | [INFO] [stdout] 1 | mod lib; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: lib.rs is the root of this crate's library target [INFO] [stdout] = help: to refer to it from other targets, use the library's name as the path [INFO] [stdout] = note: `#[warn(special_module_name)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/lib/models.rs:26:17 [INFO] [stdout] | [INFO] [stdout] 26 | self.flip(self.cards.get(idx - 1)); [INFO] [stdout] | ^^^^^----^----------^^^^^^^^^^^^^^ [INFO] [stdout] | | | | [INFO] [stdout] | | | immutable borrow occurs here [INFO] [stdout] | | immutable borrow later used by call [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/models.rs:27:17 [INFO] [stdout] | [INFO] [stdout] 27 | self.flip(self.cards.get(idx + 1)); [INFO] [stdout] | ^^^^^----^----------^^^^^^^^^^^^^^ [INFO] [stdout] | | | | [INFO] [stdout] | | | immutable borrow occurs here [INFO] [stdout] | | immutable borrow later used by call [INFO] [stdout] | mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `card` [INFO] [stdout] --> src/lib/models.rs:36:24 [INFO] [stdout] | [INFO] [stdout] 36 | fn flip(&mut self, card: Option<&Card>) { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_card` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0502`. [INFO] [stdout] [INFO] [stderr] error: could not compile `card-flipping` (bin "card-flipping") due to 2 previous errors; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: found module declaration for lib.rs [INFO] [stdout] --> src/main.rs:1:1 [INFO] [stdout] | [INFO] [stdout] 1 | mod lib; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: lib.rs is the root of this crate's library target [INFO] [stdout] = help: to refer to it from other targets, use the library's name as the path [INFO] [stdout] = note: `#[warn(special_module_name)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*self` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/lib/models.rs:26:17 [INFO] [stdout] | [INFO] [stdout] 26 | self.flip(self.cards.get(idx - 1)); [INFO] [stdout] | ^^^^^----^----------^^^^^^^^^^^^^^ [INFO] [stdout] | | | | [INFO] [stdout] | | | immutable borrow occurs here [INFO] [stdout] | | immutable borrow later used by call [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/models.rs:27:17 [INFO] [stdout] | [INFO] [stdout] 27 | self.flip(self.cards.get(idx + 1)); [INFO] [stdout] | ^^^^^----^----------^^^^^^^^^^^^^^ [INFO] [stdout] | | | | [INFO] [stdout] | | | immutable borrow occurs here [INFO] [stdout] | | immutable borrow later used by call [INFO] [stdout] | mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `card` [INFO] [stdout] --> src/lib/models.rs:36:24 [INFO] [stdout] | [INFO] [stdout] 36 | fn flip(&mut self, card: Option<&Card>) { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_card` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0502`. [INFO] [stdout] [INFO] [stderr] error: could not compile `card-flipping` (bin "card-flipping" test) due to 2 previous errors; 2 warnings emitted [INFO] running `Command { std: "docker" "inspect" "9446534610ec56505856b964b45482693a4386ee8fc1d69a95591f97354e7c27", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9446534610ec56505856b964b45482693a4386ee8fc1d69a95591f97354e7c27", kill_on_drop: false }` [INFO] [stdout] 9446534610ec56505856b964b45482693a4386ee8fc1d69a95591f97354e7c27