[INFO] cloning repository https://github.com/lkschubert8/sherbert
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lkschubert8/sherbert" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flkschubert8%2Fsherbert"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flkschubert8%2Fsherbert'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b8a2ea1f1936f11ded658f36f9f4722084b32a8
[INFO] checking lkschubert8/sherbert against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flkschubert8%2Fsherbert" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lkschubert8/sherbert on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/lkschubert8/sherbert
[INFO] finished tweaking git repo https://github.com/lkschubert8/sherbert
[INFO] tweaked toml for git repo https://github.com/lkschubert8/sherbert written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/lkschubert8/sherbert already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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] 60f5d241470a55c991b2972d4f425a20e70107c36ddc1bc3186d170fd78bc309
[INFO] running `"docker" "start" "-a" "60f5d241470a55c991b2972d4f425a20e70107c36ddc1bc3186d170fd78bc309"`
[INFO] [stderr]     Checking circular-queue v0.2.0
[INFO] [stderr]     Checking sherbert v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused imports: `File`, `read`
[INFO] [stderr]  --> src/key_store/mod.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fs::{read, File, OpenOptions};
[INFO] [stderr]   |               ^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `File`, `read`
[INFO] [stderr]  --> src/key_store/mod.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fs::{read, File, OpenOptions};
[INFO] [stderr]   |               ^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let args: Vec<String> = env::args().collect();
[INFO] [stderr]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stream`
[INFO] [stderr]   --> src/main.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let stream = stream.unwrap();
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `args`
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let args: Vec<String> = env::args().collect();
[INFO] [stderr]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stream`
[INFO] [stderr]   --> src/main.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let stream = stream.unwrap();
[INFO] [stderr]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/key_store/mod.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 let mut field = String::from_utf8(field_buffer).expect("Utf conversion f'ed up");
[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/key_store/mod.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 let mut field = String::from_utf8(field_buffer).expect("Utf conversion f'ed up");
[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: struct is never constructed: `FileMap`
[INFO] [stderr]  --> src/key_store/mod.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub struct FileMap {
[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/key_store/mod.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn new(path : String) -> FileMap {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rebuild`
[INFO] [stderr]   --> src/key_store/mod.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn rebuild(file_path: String) -> FileMap {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/key_store/mod.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn add(&mut self, key: String, value: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/key_store/mod.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn get(&mut self, key: String) -> Option<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `KeyValMap`
[INFO] [stderr]   --> src/key_store/mod.rs:66:12
[INFO] [stderr]    |
[INFO] [stderr] 66 | pub struct KeyValMap {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/key_store/mod.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     pub fn new(new_storage_dir: String) -> KeyValMap {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rebuild`
[INFO] [stderr]   --> src/key_store/mod.rs:88:5
[INFO] [stderr]    |
[INFO] [stderr] 88 |     pub fn rebuild(old_storage_dir: String) -> KeyValMap {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/key_store/mod.rs:98:5
[INFO] [stderr]    |
[INFO] [stderr] 98 |     pub fn add(&mut self, key: String, value: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]    --> src/key_store/mod.rs:109:5
[INFO] [stderr]     |
[INFO] [stderr] 109 |     pub fn get(&mut self, key: String) -> Option<String> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rebuild`
[INFO] [stderr]   --> src/key_store/mod.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn rebuild(file_path: String) -> FileMap {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `rebuild`
[INFO] [stderr]   --> src/key_store/mod.rs:88:5
[INFO] [stderr]    |
[INFO] [stderr] 88 |     pub fn rebuild(old_storage_dir: String) -> KeyValMap {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/key_store/mod.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         self.file.seek(SeekFrom::End(0));
[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/key_store/mod.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         self.file.seek(SeekFrom::End(0));
[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/key_store/mod.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         self.file.write(output.as_bytes());
[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/key_store/mod.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 self.file.seek(SeekFrom::Start(*pos));
[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/key_store/mod.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 self.file.seek(SeekFrom::Current(1));
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/key_store/mod.rs:112:15
[INFO] [stderr]     |
[INFO] [stderr] 112 |         while length - read_depth >= 0 {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/key_store/mod.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         self.file.write(output.as_bytes());
[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/key_store/mod.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 self.file.seek(SeekFrom::Start(*pos));
[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/key_store/mod.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 self.file.seek(SeekFrom::Current(1));
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/key_store/mod.rs:112:15
[INFO] [stderr]     |
[INFO] [stderr] 112 |         while length - read_depth >= 0 {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 19 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.30s
[INFO] running `"docker" "inspect" "60f5d241470a55c991b2972d4f425a20e70107c36ddc1bc3186d170fd78bc309"`
[INFO] running `"docker" "rm" "-f" "60f5d241470a55c991b2972d4f425a20e70107c36ddc1bc3186d170fd78bc309"`
[INFO] [stdout] 60f5d241470a55c991b2972d4f425a20e70107c36ddc1bc3186d170fd78bc309