[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 master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsobersanta%2Fhello-rust" "/workspace/builds/worker-2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/sobersanta/hello-rust on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "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-2/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" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 2fe3693b63f836202b0d780bc6652ef0384c2fbbd754601a85ac73a012ab5e57 [INFO] running `Command { std: "docker" "start" "-a" "2fe3693b63f836202b0d780bc6652ef0384c2fbbd754601a85ac73a012ab5e57", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2fe3693b63f836202b0d780bc6652ef0384c2fbbd754601a85ac73a012ab5e57", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2fe3693b63f836202b0d780bc6652ef0384c2fbbd754601a85ac73a012ab5e57", kill_on_drop: false }` [INFO] [stdout] 2fe3693b63f836202b0d780bc6652ef0384c2fbbd754601a85ac73a012ab5e57 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "RUSTUP_TOOLCHAIN=3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "-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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/tmp/crater-runner-fifo/jobserver-crater-fwd" "/opt/rustwide/cargo-home/bin/cargo" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 47d7855aaf88fc8e07ea9413900df0930ebc2b426705a2120813f4430de39278 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "47d7855aaf88fc8e07ea9413900df0930ebc2b426705a2120813f4430de39278", 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 proc-macro-nested v0.1.6 [INFO] [stderr] Compiling memchr v2.3.4 [INFO] [stderr] Checking futures-sink v0.3.8 [INFO] [stderr] Checking futures-core v0.3.8 [INFO] [stderr] Checking once_cell v1.5.2 [INFO] [stderr] Checking slab v0.4.2 [INFO] [stderr] Checking futures-io v0.3.8 [INFO] [stderr] Checking pin-utils v0.1.0 [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] warning: 14 warnings emitted [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] [stderr] error: could not compile `hello-rust` [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `Command { std: "docker" "inspect" "47d7855aaf88fc8e07ea9413900df0930ebc2b426705a2120813f4430de39278", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "47d7855aaf88fc8e07ea9413900df0930ebc2b426705a2120813f4430de39278", kill_on_drop: false }` [INFO] [stdout] 47d7855aaf88fc8e07ea9413900df0930ebc2b426705a2120813f4430de39278