[INFO] updating cached repository https://github.com/tyan-boot/pingcap-question [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] f7ee6939293bcb13f9c1ad5baaaa4a1ce1d7dfe4 [INFO] checking tyan-boot/pingcap-question against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftyan-boot%2Fpingcap-question" "/workspace/builds/worker-13/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/tyan-boot/pingcap-question on toolchain 45d050cde277b22a755847338f2acc2c7b834141 [INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/tyan-boot/pingcap-question [INFO] finished tweaking git repo https://github.com/tyan-boot/pingcap-question [INFO] tweaked toml for git repo https://github.com/tyan-boot/pingcap-question written to /workspace/builds/worker-13/source/Cargo.toml [INFO] crate git repo https://github.com/tyan-boot/pingcap-question already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 4e730dfd5a9c6f2f782c89d1ce03aa9eeb0f670300dd6bb7be2e6dffddb3e533 [INFO] running `"docker" "start" "-a" "4e730dfd5a9c6f2f782c89d1ce03aa9eeb0f670300dd6bb7be2e6dffddb3e533"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling libc v0.2.62 [INFO] [stderr] Compiling proc-macro2 v1.0.3 [INFO] [stderr] Checking cfg-if v0.1.9 [INFO] [stderr] Compiling getrandom v0.1.12 [INFO] [stderr] Compiling cc v1.0.42 [INFO] [stderr] Compiling syn v1.0.5 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Checking ppv-lite86 v0.2.5 [INFO] [stderr] Compiling serde v1.0.99 [INFO] [stderr] Compiling byteorder v1.3.2 [INFO] [stderr] Compiling autocfg v0.1.6 [INFO] [stderr] Compiling failure_derive v0.1.5 [INFO] [stderr] Checking rustc-demangle v0.1.16 [INFO] [stderr] Checking unicode-width v0.1.6 [INFO] [stderr] Checking remove_dir_all v0.5.2 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Compiling bincode v1.1.4 [INFO] [stderr] Checking c2-chacha v0.2.2 [INFO] [stderr] Compiling quote v1.0.2 [INFO] [stderr] Compiling backtrace-sys v0.1.31 [INFO] [stderr] Checking atty v0.2.13 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking rand_chacha v0.2.1 [INFO] [stderr] Checking rand v0.7.0 [INFO] [stderr] Checking backtrace v0.3.37 [INFO] [stderr] Checking tempfile v3.1.0 [INFO] [stderr] Compiling synstructure v0.10.2 [INFO] [stderr] Compiling serde_derive v1.0.99 [INFO] [stderr] Checking failure v0.1.5 [INFO] [stderr] Checking project-pingcap-algo v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused import: `std::fs::File` [INFO] [stderr] --> src/main.rs:1:5 [INFO] [stderr] | [INFO] [stderr] 1 | use std::fs::File; [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::io::BufReader` [INFO] [stderr] --> src/main.rs:2:5 [INFO] [stderr] | [INFO] [stderr] 2 | use std::io::BufReader; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::path::Path` [INFO] [stderr] --> src/main.rs:3:5 [INFO] [stderr] | [INFO] [stderr] 3 | use std::path::Path; [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `bincode::ErrorKind` [INFO] [stderr] --> src/main.rs:5:5 [INFO] [stderr] | [INFO] [stderr] 5 | use bincode::ErrorKind; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `failure::Error` [INFO] [stderr] --> src/main.rs:7:5 [INFO] [stderr] | [INFO] [stderr] 7 | use failure::Error; [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `BufRead` [INFO] [stderr] --> src/v2/count.rs:5:32 [INFO] [stderr] | [INFO] [stderr] 5 | use std::io::{Read, BufReader, BufRead}; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused imports: `BufRead`, `Read`, `Write` [INFO] [stderr] --> src/v2/io.rs:2:15 [INFO] [stderr] | [INFO] [stderr] 2 | use std::io::{Read, BufReader, BufRead, Write, Seek, SeekFrom}; [INFO] [stderr] | ^^^^ ^^^^^^^ ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::process::id` [INFO] [stderr] --> src/v2/io.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | use std::process::id; [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around function argument [INFO] [stderr] --> src/v2/io.rs:80:41 [INFO] [stderr] | [INFO] [stderr] 80 | it.seek(SeekFrom::Start((0))); [INFO] [stderr] | ^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around function argument [INFO] [stderr] --> src/v2/io.rs:125:41 [INFO] [stderr] | [INFO] [stderr] 125 | it.seek(SeekFrom::Start((0))); [INFO] [stderr] | ^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::fs::File` [INFO] [stderr] --> src/main.rs:1:5 [INFO] [stderr] | [INFO] [stderr] 1 | use std::fs::File; [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::io::BufReader` [INFO] [stderr] --> src/main.rs:2:5 [INFO] [stderr] | [INFO] [stderr] 2 | use std::io::BufReader; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::path::Path` [INFO] [stderr] --> src/main.rs:3:5 [INFO] [stderr] | [INFO] [stderr] 3 | use std::path::Path; [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `bincode::ErrorKind` [INFO] [stderr] --> src/main.rs:5:5 [INFO] [stderr] | [INFO] [stderr] 5 | use bincode::ErrorKind; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `failure::Error` [INFO] [stderr] --> src/main.rs:7:5 [INFO] [stderr] | [INFO] [stderr] 7 | use failure::Error; [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `BufRead` [INFO] [stderr] --> src/v2/count.rs:5:32 [INFO] [stderr] | [INFO] [stderr] 5 | use std::io::{Read, BufReader, BufRead}; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused imports: `BufRead`, `Read`, `Write` [INFO] [stderr] --> src/v2/io.rs:2:15 [INFO] [stderr] | [INFO] [stderr] 2 | use std::io::{Read, BufReader, BufRead, Write, Seek, SeekFrom}; [INFO] [stderr] | ^^^^ ^^^^^^^ ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `std::process::id` [INFO] [stderr] --> src/v2/io.rs:6:5 [INFO] [stderr] | [INFO] [stderr] 6 | use std::process::id; [INFO] [stderr] | ^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around function argument [INFO] [stderr] --> src/v2/io.rs:80:41 [INFO] [stderr] | [INFO] [stderr] 80 | it.seek(SeekFrom::Start((0))); [INFO] [stderr] | ^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around function argument [INFO] [stderr] --> src/v2/io.rs:125:41 [INFO] [stderr] | [INFO] [stderr] 125 | it.seek(SeekFrom::Start((0))); [INFO] [stderr] | ^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] warning: unused variable: `offset` [INFO] [stderr] --> src/v2/count.rs:29:26 [INFO] [stderr] | [INFO] [stderr] 29 | Some((count, offset)) => { [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_offset` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `buf` [INFO] [stderr] --> src/v2/io.rs:105:25 [INFO] [stderr] | [INFO] [stderr] 105 | let buf = bincode::serialized_size(&wo); [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_buf` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `offset` [INFO] [stderr] --> src/v2/count.rs:29:26 [INFO] [stderr] | [INFO] [stderr] 29 | Some((count, offset)) => { [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_offset` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `buf` [INFO] [stderr] --> src/v2/io.rs:105:25 [INFO] [stderr] | [INFO] [stderr] 105 | let buf = bincode::serialized_size(&wo); [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_buf` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/v2/count.rs:26:13 [INFO] [stderr] | [INFO] [stderr] 26 | let mut item = self.map.get_mut(&word); [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/v2/io.rs:46:24 [INFO] [stderr] | [INFO] [stderr] 46 | while let Some(mut file) = self.big_chunks.pop() { [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Counter` [INFO] [stderr] --> src/v1/count.rs:12:12 [INFO] [stderr] | [INFO] [stderr] 12 | pub struct Counter { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/v1/count.rs:17:5 [INFO] [stderr] | [INFO] [stderr] 17 | pub fn new() -> Self { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `count` [INFO] [stderr] --> src/v1/count.rs:24:5 [INFO] [stderr] | [INFO] [stderr] 24 | pub fn count(&mut self, key: String, offset: u64) -> u64 { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `flush` [INFO] [stderr] --> src/v1/count.rs:44:5 [INFO] [stderr] | [INFO] [stderr] 44 | pub fn flush(&mut self) -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `MergeCounter` [INFO] [stderr] --> src/v1/merge.rs:6:12 [INFO] [stderr] | [INFO] [stderr] 6 | pub struct MergeCounter { [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/v1/merge.rs:13:5 [INFO] [stderr] | [INFO] [stderr] 13 | pub fn new() -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `count` [INFO] [stderr] --> src/v1/merge.rs:21:5 [INFO] [stderr] | [INFO] [stderr] 21 | pub fn count(&mut self, key: String, other_count: u64, offset: u64) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `get_ans` [INFO] [stderr] --> src/v1/merge.rs:59:5 [INFO] [stderr] | [INFO] [stderr] 59 | pub fn get_ans(&mut self) -> Option<(String, u64)> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `MergePair` [INFO] [stderr] --> src/v1.rs:17:8 [INFO] [stderr] | [INFO] [stderr] 17 | struct MergePair(String, u64, u64, BufReader); [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Count` [INFO] [stderr] --> src/v1.rs:19:8 [INFO] [stderr] | [INFO] [stderr] 19 | struct Count { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/v1.rs:28:5 [INFO] [stderr] | [INFO] [stderr] 28 | pub fn new>(path: P) -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `count_chunk` [INFO] [stderr] --> src/v1.rs:42:5 [INFO] [stderr] | [INFO] [stderr] 42 | fn count_chunk(&mut self) -> Result<(), Error> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `merge` [INFO] [stderr] --> src/v1.rs:81:5 [INFO] [stderr] | [INFO] [stderr] 81 | fn merge(&mut self) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `solve` [INFO] [stderr] --> src/v1.rs:125:5 [INFO] [stderr] | [INFO] [stderr] 125 | pub fn solve(&mut self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/v2/count.rs:69:13 [INFO] [stderr] | [INFO] [stderr] 69 | chunk.read_to_end(&mut buff); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/v2/io.rs:67:25 [INFO] [stderr] | [INFO] [stderr] 67 | bincode::serialize_into(&mut chunk, &wo); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/v2/io.rs:80:17 [INFO] [stderr] | [INFO] [stderr] 80 | it.seek(SeekFrom::Start((0))); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/v2/io.rs:107:21 [INFO] [stderr] | [INFO] [stderr] 107 | bincode::serialize_into(&mut file, &wo); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/v2/io.rs:125:17 [INFO] [stderr] | [INFO] [stderr] 125 | it.seek(SeekFrom::Start((0))); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/v2/count.rs:26:13 [INFO] [stderr] | [INFO] [stderr] 26 | let mut item = self.map.get_mut(&word); [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: 33 warnings emitted [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/v2/io.rs:46:24 [INFO] [stderr] | [INFO] [stderr] 46 | while let Some(mut file) = self.big_chunks.pop() { [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `MergePair` [INFO] [stderr] --> src/v1.rs:17:8 [INFO] [stderr] | [INFO] [stderr] 17 | struct MergePair(String, u64, u64, BufReader); [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Count` [INFO] [stderr] --> src/v1.rs:19:8 [INFO] [stderr] | [INFO] [stderr] 19 | struct Count { [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/v1.rs:28:5 [INFO] [stderr] | [INFO] [stderr] 28 | pub fn new>(path: P) -> Result { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `count_chunk` [INFO] [stderr] --> src/v1.rs:42:5 [INFO] [stderr] | [INFO] [stderr] 42 | fn count_chunk(&mut self) -> Result<(), Error> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `merge` [INFO] [stderr] --> src/v1.rs:81:5 [INFO] [stderr] | [INFO] [stderr] 81 | fn merge(&mut self) { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `solve` [INFO] [stderr] --> src/v1.rs:125:5 [INFO] [stderr] | [INFO] [stderr] 125 | pub fn solve(&mut self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/v2/count.rs:69:13 [INFO] [stderr] | [INFO] [stderr] 69 | chunk.read_to_end(&mut buff); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/v2/io.rs:67:25 [INFO] [stderr] | [INFO] [stderr] 67 | bincode::serialize_into(&mut chunk, &wo); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/v2/io.rs:80:17 [INFO] [stderr] | [INFO] [stderr] 80 | it.seek(SeekFrom::Start((0))); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/v2/io.rs:107:21 [INFO] [stderr] | [INFO] [stderr] 107 | bincode::serialize_into(&mut file, &wo); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: unused `std::result::Result` that must be used [INFO] [stderr] --> src/v2/io.rs:125:17 [INFO] [stderr] | [INFO] [stderr] 125 | it.seek(SeekFrom::Start((0))); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stderr] [INFO] [stderr] warning: 25 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 49.78s [INFO] running `"docker" "inspect" "4e730dfd5a9c6f2f782c89d1ce03aa9eeb0f670300dd6bb7be2e6dffddb3e533"` [INFO] running `"docker" "rm" "-f" "4e730dfd5a9c6f2f782c89d1ce03aa9eeb0f670300dd6bb7be2e6dffddb3e533"` [INFO] [stdout] 4e730dfd5a9c6f2f782c89d1ce03aa9eeb0f670300dd6bb7be2e6dffddb3e533