[INFO] cloning repository https://github.com/shafiquejamal/rust-coding-practice [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shafiquejamal/rust-coding-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshafiquejamal%2Frust-coding-practice", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshafiquejamal%2Frust-coding-practice'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5576137b21ec1db8f3824bdfe6c4faf360c6aaaa [INFO] checking shafiquejamal/rust-coding-practice against try#9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869 for pr-129249 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshafiquejamal%2Frust-coding-practice" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/shafiquejamal/rust-coding-practice on toolchain 9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/shafiquejamal/rust-coding-practice [INFO] finished tweaking git repo https://github.com/shafiquejamal/rust-coding-practice [INFO] tweaked toml for git repo https://github.com/shafiquejamal/rust-coding-practice written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/shafiquejamal/rust-coding-practice 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" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 0d9772c3939c7dd8ca65fd3c312d59584cd39f6a0daa4845effb3cabd9db54a9 [INFO] running `Command { std: "docker" "start" "-a" "0d9772c3939c7dd8ca65fd3c312d59584cd39f6a0daa4845effb3cabd9db54a9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0d9772c3939c7dd8ca65fd3c312d59584cd39f6a0daa4845effb3cabd9db54a9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0d9772c3939c7dd8ca65fd3c312d59584cd39f6a0daa4845effb3cabd9db54a9", kill_on_drop: false }` [INFO] [stdout] 0d9772c3939c7dd8ca65fd3c312d59584cd39f6a0daa4845effb3cabd9db54a9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b161d9c98bc22475b75f043f436689814e411ebfd3eb30f9fc0d72dfa99ab66c [INFO] running `Command { std: "docker" "start" "-a" "b161d9c98bc22475b75f043f436689814e411ebfd3eb30f9fc0d72dfa99ab66c", kill_on_drop: false }` [INFO] [stderr] Checking playground1 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `set` [INFO] [stdout] --> src/p_refs1.rs:4:13 [INFO] [stdout] | [INFO] [stdout] 4 | let mut set: HashSet<&str> = HashSet::new(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_set` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/p_refs1.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let mut set: HashSet<&str> = HashSet::new(); [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/p_refs1.rs:9:39 [INFO] [stdout] | [INFO] [stdout] 9 | Some(next_targets) => for t in *next_targets {}, [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/sg_anagrams.rs:15:17 [INFO] [stdout] | [INFO] [stdout] 15 | let mut count: &mut u32 = a_map.get_mut(&c).unwrap_or(&mut default); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/sg_reversestring.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | for i in 0..=last_index { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `recurse` is never used [INFO] [stdout] --> src/p_refs1.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn recurse<'b>(m: &HashMap<&str, Vec<&'b str>>, new_target: &'b str) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fib_memo` is never used [INFO] [stdout] --> src/sg_fibonacci.rs:83:8 [INFO] [stdout] | [INFO] [stdout] 83 | fn fib_memo(n: usize, memo: &mut [Option]) -> usize { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this conversion is useless `sg_linked_list::linked_list::Node` to `sg_linked_list::linked_list::Node` [INFO] [stdout] --> src/sg_linked_list.rs:153:37 [INFO] [stdout] | [INFO] [stdout] 153 | let new_node: Node = Node::new_with(data).into(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[deny(self_type_conversion)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this conversion is useless `Option>>` to `Option>>` [INFO] [stdout] --> src/sg_linked_list.rs:222:47 [INFO] [stdout] | [INFO] [stdout] 222 | node_to_insert.next = the_rest.into(); [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `set` [INFO] [stdout] --> src/p_refs1.rs:4:13 [INFO] [stdout] | [INFO] [stdout] 4 | let mut set: HashSet<&str> = HashSet::new(); [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_set` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: comparison is useless due to type limits [INFO] [stdout] --> src/sg_linked_list.rs:99:16 [INFO] [stdout] | [INFO] [stdout] 99 | if index < 0 { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_comparisons)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/p_refs1.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | let mut set: HashSet<&str> = HashSet::new(); [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `t` [INFO] [stdout] --> src/p_refs1.rs:9:39 [INFO] [stdout] | [INFO] [stdout] 9 | Some(next_targets) => for t in *next_targets {}, [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_t` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/sg_anagrams.rs:15:17 [INFO] [stdout] | [INFO] [stdout] 15 | let mut count: &mut u32 = a_map.get_mut(&c).unwrap_or(&mut default); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `playground1` (lib) due to 2 previous errors; 8 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/sg_reversestring.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | for i in 0..=last_index { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `recurse` is never used [INFO] [stdout] --> src/p_refs1.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn recurse<'b>(m: &HashMap<&str, Vec<&'b str>>, new_target: &'b str) { [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `no_rec_depth1` is never used [INFO] [stdout] --> src/p_refs1.rs:22:8 [INFO] [stdout] | [INFO] [stdout] 22 | fn no_rec_depth1() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `no_rec_depth2` is never used [INFO] [stdout] --> src/p_refs1.rs:31:8 [INFO] [stdout] | [INFO] [stdout] 31 | fn no_rec_depth2() { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `fib_memo` is never used [INFO] [stdout] --> src/sg_fibonacci.rs:83:8 [INFO] [stdout] | [INFO] [stdout] 83 | fn fib_memo(n: usize, memo: &mut [Option]) -> usize { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `can_weave` is never used [INFO] [stdout] --> src/sg_queue.rs:72:8 [INFO] [stdout] | [INFO] [stdout] 72 | fn can_weave() { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this conversion is useless `sg_linked_list::linked_list::Node` to `sg_linked_list::linked_list::Node` [INFO] [stdout] --> src/sg_linked_list.rs:153:37 [INFO] [stdout] | [INFO] [stdout] 153 | let new_node: Node = Node::new_with(data).into(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[deny(self_type_conversion)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this conversion is useless `Option>>` to `Option>>` [INFO] [stdout] --> src/sg_linked_list.rs:222:47 [INFO] [stdout] | [INFO] [stdout] 222 | node_to_insert.next = the_rest.into(); [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: comparison is useless due to type limits [INFO] [stdout] --> src/sg_linked_list.rs:99:16 [INFO] [stdout] | [INFO] [stdout] 99 | if index < 0 { [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_comparisons)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `playground1` (lib test) due to 2 previous errors; 11 warnings emitted [INFO] running `Command { std: "docker" "inspect" "b161d9c98bc22475b75f043f436689814e411ebfd3eb30f9fc0d72dfa99ab66c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b161d9c98bc22475b75f043f436689814e411ebfd3eb30f9fc0d72dfa99ab66c", kill_on_drop: false }` [INFO] [stdout] b161d9c98bc22475b75f043f436689814e411ebfd3eb30f9fc0d72dfa99ab66c