[INFO] cloning repository https://github.com/andy-thomason/kvstore
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andy-thomason/kvstore" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandy-thomason%2Fkvstore", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandy-thomason%2Fkvstore'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf1abf64fb1078b63d51b3f02098949ee6adef35
[INFO] checking andy-thomason/kvstore against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandy-thomason%2Fkvstore" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/andy-thomason/kvstore
[INFO] finished tweaking git repo https://github.com/andy-thomason/kvstore
[INFO] tweaked toml for git repo https://github.com/andy-thomason/kvstore written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/andy-thomason/kvstore on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/andy-thomason/kvstore 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37fb4f2e811ec6201bcabee7d3cf3dd401c1d75da83101c341bfa98a4d1cf6f9
[INFO] running `Command { std: "docker" "start" "-a" "37fb4f2e811ec6201bcabee7d3cf3dd401c1d75da83101c341bfa98a4d1cf6f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37fb4f2e811ec6201bcabee7d3cf3dd401c1d75da83101c341bfa98a4d1cf6f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37fb4f2e811ec6201bcabee7d3cf3dd401c1d75da83101c341bfa98a4d1cf6f9", kill_on_drop: false }`
[INFO] [stdout] 37fb4f2e811ec6201bcabee7d3cf3dd401c1d75da83101c341bfa98a4d1cf6f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb09705aebe33af976c8ac1afb5b8c8d2302df6b4ebbfd9f1213cd7ffe32cda9
[INFO] running `Command { std: "docker" "start" "-a" "fb09705aebe33af976c8ac1afb5b8c8d2302df6b4ebbfd9f1213cd7ffe32cda9", kill_on_drop: false }`
[INFO] [stderr]     Checking kvstore v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> src/file_spec.rs:161:23
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn get(&self, key: &[u8], res: &mut [u8]) -> Result<Option<usize>, Error> {
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/file_spec.rs:161:35
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn get(&self, key: &[u8], res: &mut [u8]) -> Result<Option<usize>, Error> {
[INFO] [stdout]     |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/file_spec.rs:188:35
[INFO] [stdout]     |
[INFO] [stdout] 188 |     pub fn get(&self, key: &[u8], res: &mut [u8]) -> Result<Option<usize>, Error> {
[INFO] [stdout]     |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value_offsets`
[INFO] [stdout]    --> src/file_spec.rs:198:13
[INFO] [stdout]     |
[INFO] [stdout] 198 |         let value_offsets = &self.buf[keys_end..values_end];
[INFO] [stdout]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_value_offsets`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lower`
[INFO] [stdout]    --> src/file_spec.rs:200:13
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let lower = partition(key, bytes, key_offsets, Ordering::Less);
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_lower`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `upper`
[INFO] [stdout]    --> src/file_spec.rs:201:13
[INFO] [stdout]     |
[INFO] [stdout] 201 |         let upper = partition(key, bytes, key_offsets, Ordering::Greater);
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_upper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> src/lib.rs:108:23
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn set(&mut self, key: &[u8], buf: &[u8]) -> Result<(), Error> {
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]    --> src/lib.rs:108:35
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn set(&mut self, key: &[u8], buf: &[u8]) -> Result<(), Error> {
[INFO] [stdout]     |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> src/file_spec.rs:161:23
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn get(&self, key: &[u8], res: &mut [u8]) -> Result<Option<usize>, Error> {
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kvstore` (lib) due to 1 previous error; 8 warnings emitted
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/file_spec.rs:161:35
[INFO] [stdout]     |
[INFO] [stdout] 161 |     pub fn get(&self, key: &[u8], res: &mut [u8]) -> Result<Option<usize>, Error> {
[INFO] [stdout]     |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/file_spec.rs:188:35
[INFO] [stdout]     |
[INFO] [stdout] 188 |     pub fn get(&self, key: &[u8], res: &mut [u8]) -> Result<Option<usize>, Error> {
[INFO] [stdout]     |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kvstore` (lib test) due to 1 previous error; 8 warnings emitted
[INFO] [stdout] warning: unused variable: `value_offsets`
[INFO] [stdout]    --> src/file_spec.rs:198:13
[INFO] [stdout]     |
[INFO] [stdout] 198 |         let value_offsets = &self.buf[keys_end..values_end];
[INFO] [stdout]     |             ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_value_offsets`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lower`
[INFO] [stdout]    --> src/file_spec.rs:200:13
[INFO] [stdout]     |
[INFO] [stdout] 200 |         let lower = partition(key, bytes, key_offsets, Ordering::Less);
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_lower`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `upper`
[INFO] [stdout]    --> src/file_spec.rs:201:13
[INFO] [stdout]     |
[INFO] [stdout] 201 |         let upper = partition(key, bytes, key_offsets, Ordering::Greater);
[INFO] [stdout]     |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_upper`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]    --> src/lib.rs:108:23
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn set(&mut self, key: &[u8], buf: &[u8]) -> Result<(), Error> {
[INFO] [stdout]     |                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `buf`
[INFO] [stdout]    --> src/lib.rs:108:35
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn set(&mut self, key: &[u8], buf: &[u8]) -> Result<(), Error> {
[INFO] [stdout]     |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_buf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/memory_storage.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 |             vec.resize(newlen.try_into().bad()?, 0);
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/memory_storage.rs:18:24
[INFO] [stdout]    |
[INFO] [stdout] 18 |             vec.resize(newlen.try_into().bad()?, 0);
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "fb09705aebe33af976c8ac1afb5b8c8d2302df6b4ebbfd9f1213cd7ffe32cda9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb09705aebe33af976c8ac1afb5b8c8d2302df6b4ebbfd9f1213cd7ffe32cda9", kill_on_drop: false }`
[INFO] [stdout] fb09705aebe33af976c8ac1afb5b8c8d2302df6b4ebbfd9f1213cd7ffe32cda9
