[INFO] cloning repository https://github.com/sobersanta/hello-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sobersanta/hello-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsobersanta%2Fhello-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsobersanta%2Fhello-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] b869da0928681b3e833519615cdad4cdfc11f377 [INFO] checking sobersanta/hello-rust against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsobersanta%2Fhello-rust" "/workspace/builds/worker-8/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/sobersanta/hello-rust on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/sobersanta/hello-rust [INFO] finished tweaking git repo https://github.com/sobersanta/hello-rust [INFO] tweaked toml for git repo https://github.com/sobersanta/hello-rust written to /workspace/builds/worker-8/source/Cargo.toml [INFO] crate git repo https://github.com/sobersanta/hello-rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 1b79675b44b143db422f0994f582d710910f2be9ae23bf2f51fe605acb01809d [INFO] running `Command { std: "docker" "start" "-a" "1b79675b44b143db422f0994f582d710910f2be9ae23bf2f51fe605acb01809d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1b79675b44b143db422f0994f582d710910f2be9ae23bf2f51fe605acb01809d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1b79675b44b143db422f0994f582d710910f2be9ae23bf2f51fe605acb01809d", kill_on_drop: false }` [INFO] [stdout] 1b79675b44b143db422f0994f582d710910f2be9ae23bf2f51fe605acb01809d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 80a708f7e725bda2f00830cf348d9d8df282e25f56e5ba39ff006abc163f8957 [INFO] running `Command { std: "docker" "start" "-a" "80a708f7e725bda2f00830cf348d9d8df282e25f56e5ba39ff006abc163f8957", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.24 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling syn v1.0.58 [INFO] [stderr] Compiling proc-macro-hack v0.5.19 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Compiling proc-macro-nested v0.1.6 [INFO] [stderr] Checking futures-core v0.3.8 [INFO] [stderr] Checking futures-sink v0.3.8 [INFO] [stderr] Checking once_cell v1.5.2 [INFO] [stderr] Checking futures-io v0.3.8 [INFO] [stderr] Checking pin-utils v0.1.0 [INFO] [stderr] Checking slab v0.4.2 [INFO] [stderr] Checking futures-channel v0.3.8 [INFO] [stderr] Checking futures-task v0.3.8 [INFO] [stderr] Compiling quote v1.0.8 [INFO] [stderr] Compiling pin-project-internal v1.0.3 [INFO] [stderr] Compiling futures-macro v0.3.8 [INFO] [stderr] Checking pin-project v1.0.3 [INFO] [stderr] Checking futures-util v0.3.8 [INFO] [stderr] Checking futures-executor v0.3.8 [INFO] [stderr] Checking futures v0.3.8 [INFO] [stderr] Checking hello-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> src/exercises/cacher/mod.rs:21:8 [INFO] [stdout] | [INFO] [stdout] 21 | fn new(calculation: T) -> Cacher { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `value` [INFO] [stdout] --> src/exercises/cacher/mod.rs:28:8 [INFO] [stdout] | [INFO] [stdout] 28 | fn value(&mut self, arg: &V) -> &R { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `Solution` [INFO] [stdout] --> src/exercises/is_robot_bounded.rs:11:8 [INFO] [stdout] | [INFO] [stdout] 11 | struct Solution; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `new` [INFO] [stdout] --> src/exercises/is_robot_bounded.rs:34:8 [INFO] [stdout] | [INFO] [stdout] 34 | fn new(x: i32, y: i32) -> Point { [INFO] [stdout] | ^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `plus` [INFO] [stdout] --> src/exercises/is_robot_bounded.rs:38:8 [INFO] [stdout] | [INFO] [stdout] 38 | fn plus(&mut self, other: &Point) { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `rotate_90_cw` [INFO] [stdout] --> src/exercises/is_robot_bounded.rs:43:8 [INFO] [stdout] | [INFO] [stdout] 43 | fn rotate_90_cw(&mut self) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `rotate_90_ccw` [INFO] [stdout] --> src/exercises/is_robot_bounded.rs:50:8 [INFO] [stdout] | [INFO] [stdout] 50 | fn rotate_90_ccw(&mut self) { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant is never used: `NORTH` [INFO] [stdout] --> src/exercises/is_robot_bounded.rs:58:1 [INFO] [stdout] | [INFO] [stdout] 58 | const NORTH: Point = Point { x: 0, y: 1 }; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: constant is never used: `ZERO` [INFO] [stdout] --> src/exercises/is_robot_bounded.rs:59:1 [INFO] [stdout] | [INFO] [stdout] 59 | const ZERO: Point = Point { x: 0, y: 0 }; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `is_robot_bounded` [INFO] [stdout] --> src/exercises/is_robot_bounded.rs:62:12 [INFO] [stdout] | [INFO] [stdout] 62 | pub fn is_robot_bounded(instructions: String) -> bool { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `Solution` [INFO] [stdout] --> src/exercises/increasing_subsequences.rs:4:8 [INFO] [stdout] | [INFO] [stdout] 4 | struct Solution {} [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `find_subsequences` [INFO] [stdout] --> src/exercises/increasing_subsequences.rs:7:12 [INFO] [stdout] | [INFO] [stdout] 7 | pub fn find_subsequences(nums: Vec) -> Vec> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `recur` [INFO] [stdout] --> src/exercises/increasing_subsequences.rs:14:4 [INFO] [stdout] | [INFO] [stdout] 14 | fn recur(nums: &[i32], last: i32, accum: &mut Vec, results: &mut HashSet>) { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_a_mut` [INFO] [stdout] --> src/exercises/borrow_xxx/mod.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | fn get_a_mut(self: &mut A) -> &'_ mut String { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `a` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/exercises/borrow_xxx/mod.rs:36:9 [INFO] [stdout] | [INFO] [stdout] 35 | let y = &a.y; [INFO] [stdout] | ---- immutable borrow occurs here [INFO] [stdout] 36 | a.get_a_mut().xxx(|| String::from(y)); [INFO] [stdout] | ^^^^^^^^^^^^^ - immutable borrow later captured here by closure [INFO] [stdout] | | [INFO] [stdout] | mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0502`. [INFO] [stdout] [INFO] [stdout] warning: 14 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `hello-rust` due to 2 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "80a708f7e725bda2f00830cf348d9d8df282e25f56e5ba39ff006abc163f8957", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "80a708f7e725bda2f00830cf348d9d8df282e25f56e5ba39ff006abc163f8957", kill_on_drop: false }` [INFO] [stdout] 80a708f7e725bda2f00830cf348d9d8df282e25f56e5ba39ff006abc163f8957