[INFO] cloning repository https://github.com/x-hansong/kvs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/x-hansong/kvs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fx-hansong%2Fkvs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fx-hansong%2Fkvs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6af8f524a2e274391715421899944f8c101bfcc0
[INFO] checking x-hansong/kvs 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%2Fx-hansong%2Fkvs" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/x-hansong/kvs
[INFO] finished tweaking git repo https://github.com/x-hansong/kvs
[INFO] tweaked toml for git repo https://github.com/x-hansong/kvs written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/x-hansong/kvs 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/x-hansong/kvs 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2e8b17df34dafc21b8bc134683afa6574031bb0b391410af1061610104aa2ef4
[INFO] running `Command { std: "docker" "start" "-a" "2e8b17df34dafc21b8bc134683afa6574031bb0b391410af1061610104aa2ef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e8b17df34dafc21b8bc134683afa6574031bb0b391410af1061610104aa2ef4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e8b17df34dafc21b8bc134683afa6574031bb0b391410af1061610104aa2ef4", kill_on_drop: false }`
[INFO] [stdout] 2e8b17df34dafc21b8bc134683afa6574031bb0b391410af1061610104aa2ef4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] a8eadc7c2071e69bd7b9fdc03c323646e75a6cdd6a20ceceff03ec0133f84b09
[INFO] running `Command { std: "docker" "start" "-a" "a8eadc7c2071e69bd7b9fdc03c323646e75a6cdd6a20ceceff03ec0133f84b09", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling serde_json v1.0.62
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking os_str_bytes v2.4.0
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking predicates v1.0.7
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]     Checking kvs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `get`
[INFO] [stdout]   --> src/bin/kvs.rs:48:22
[INFO] [stdout]    |
[INFO] [stdout] 48 |         Command::Get(get) => {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_get`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `set`
[INFO] [stdout]   --> src/bin/kvs.rs:52:22
[INFO] [stdout]    |
[INFO] [stdout] 52 |         Command::Set(set) => {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_set`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rm`
[INFO] [stdout]   --> src/bin/kvs.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |         Command::Rm(rm) => {
[INFO] [stdout]    |                     ^^ help: if this is intentional, prefix it with an underscore: `_rm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `key` is never read
[INFO] [stdout]   --> src/bin/kvs.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Get {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 26 |     #[clap()]
[INFO] [stdout] 27 |     key: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `key` is never read
[INFO] [stdout]   --> src/bin/kvs.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Rm {
[INFO] [stdout]    |        -- field in this struct
[INFO] [stdout] 32 |     #[clap()]
[INFO] [stdout] 33 |     key: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `key` and `value` are never read
[INFO] [stdout]   --> src/bin/kvs.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct Set {
[INFO] [stdout]    |        --- fields in this struct
[INFO] [stdout] 38 |     #[clap()]
[INFO] [stdout] 39 |     key: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 40 |     #[clap()]
[INFO] [stdout] 41 |     value: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `get`
[INFO] [stdout]   --> src/bin/kvs.rs:48:22
[INFO] [stdout]    |
[INFO] [stdout] 48 |         Command::Get(get) => {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_get`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `set`
[INFO] [stdout]   --> src/bin/kvs.rs:52:22
[INFO] [stdout]    |
[INFO] [stdout] 52 |         Command::Set(set) => {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_set`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rm`
[INFO] [stdout]   --> src/bin/kvs.rs:56:21
[INFO] [stdout]    |
[INFO] [stdout] 56 |         Command::Rm(rm) => {
[INFO] [stdout]    |                     ^^ help: if this is intentional, prefix it with an underscore: `_rm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `key` is never read
[INFO] [stdout]   --> src/bin/kvs.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Get {
[INFO] [stdout]    |        --- field in this struct
[INFO] [stdout] 26 |     #[clap()]
[INFO] [stdout] 27 |     key: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `key` is never read
[INFO] [stdout]   --> src/bin/kvs.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Rm {
[INFO] [stdout]    |        -- field in this struct
[INFO] [stdout] 32 |     #[clap()]
[INFO] [stdout] 33 |     key: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `key` and `value` are never read
[INFO] [stdout]   --> src/bin/kvs.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct Set {
[INFO] [stdout]    |        --- fields in this struct
[INFO] [stdout] 38 |     #[clap()]
[INFO] [stdout] 39 |     key: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 40 |     #[clap()]
[INFO] [stdout] 41 |     value: String,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/kvs.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     #[clap()]
[INFO] [stdout] 27 | |     key: String,
[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<String, Infallible>
[INFO] [stdout]   --> src/bin/kvs.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | /     #[clap()]
[INFO] [stdout] 33 | |     key: String,
[INFO] [stdout]    | |_______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/kvs.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | /     #[clap()]
[INFO] [stdout] 39 | |     key: String,
[INFO] [stdout]    | |_______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/kvs.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | /     #[clap()]
[INFO] [stdout] 41 | |     value: String,
[INFO] [stdout]    | |_________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/kvs.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | /     #[clap()]
[INFO] [stdout] 27 | |     key: String,
[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<String, Infallible>
[INFO] [stdout]   --> src/bin/kvs.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | /     #[clap()]
[INFO] [stdout] 33 | |     key: String,
[INFO] [stdout]    | |_______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/kvs.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | /     #[clap()]
[INFO] [stdout] 39 | |     key: String,
[INFO] [stdout]    | |_______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/bin/kvs.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | /     #[clap()]
[INFO] [stdout] 41 | |     value: String,
[INFO] [stdout]    | |_________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kvs` (bin "kvs" test) due to 4 previous errors; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `kvs` (bin "kvs") due to 4 previous errors; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "a8eadc7c2071e69bd7b9fdc03c323646e75a6cdd6a20ceceff03ec0133f84b09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8eadc7c2071e69bd7b9fdc03c323646e75a6cdd6a20ceceff03ec0133f84b09", kill_on_drop: false }`
[INFO] [stdout] a8eadc7c2071e69bd7b9fdc03c323646e75a6cdd6a20ceceff03ec0133f84b09
