[INFO] updating cached repository lkschubert8/sherbert
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lkschubert8/sherbert
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lkschubert8/sherbert" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/lkschubert8/sherbert"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/lkschubert8/sherbert'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lkschubert8/sherbert" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/lkschubert8/sherbert"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/lkschubert8/sherbert'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b8a2ea1f1936f11ded658f36f9f4722084b32a8
[INFO] sha for GitHub repo lkschubert8/sherbert: 3b8a2ea1f1936f11ded658f36f9f4722084b32a8
[INFO] validating manifest of lkschubert8/sherbert on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of lkschubert8/sherbert on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing lkschubert8/sherbert
[INFO] finished frobbing lkschubert8/sherbert
[INFO] frobbed toml for lkschubert8/sherbert written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/lkschubert8/sherbert/Cargo.toml
[INFO] started frobbing lkschubert8/sherbert
[INFO] finished frobbing lkschubert8/sherbert
[INFO] frobbed toml for lkschubert8/sherbert written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/lkschubert8/sherbert/Cargo.toml
[INFO] crate lkschubert8/sherbert already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking lkschubert8/sherbert against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-6/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/lkschubert8/sherbert:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cb10fa4a2a03912862e2117fd94896993b0f38ff61591eb75f9eb01796abec97
[INFO] running `"docker" "start" "-a" "cb10fa4a2a03912862e2117fd94896993b0f38ff61591eb75f9eb01796abec97"`
[INFO] [stderr]     Checking circular-queue v0.2.0
[INFO] [stderr]     Checking sherbert v0.1.0 (/opt/crater/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: consider prefixing 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: consider prefixing 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: struct is never constructed: `FileMap`
[INFO] [stderr]  --> src/key_store/mod.rs:7:1
[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:66:1
[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: 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 variable: `args`
[INFO] [stderr]  --> src/main.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let args: Vec<String> = env::args().collect();
[INFO] [stderr]   |         ^^^^ help: consider prefixing 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: consider prefixing 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: 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: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]     Finished dev [unoptimized + debuginfo] target(s) in 1.61s
[INFO] running `"docker" "inspect" "cb10fa4a2a03912862e2117fd94896993b0f38ff61591eb75f9eb01796abec97"`
[INFO] running `"docker" "rm" "-f" "cb10fa4a2a03912862e2117fd94896993b0f38ff61591eb75f9eb01796abec97"`
[INFO] [stdout] cb10fa4a2a03912862e2117fd94896993b0f38ff61591eb75f9eb01796abec97