[INFO] cloning repository https://github.com/Zarrko/InMemory-KVS
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Zarrko/InMemory-KVS" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZarrko%2FInMemory-KVS", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZarrko%2FInMemory-KVS'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c383c84f29c5c7fb5c4103fc1c39497ec38206ac
[INFO] checking Zarrko/InMemory-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%2FZarrko%2FInMemory-KVS" "/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/Zarrko/InMemory-KVS
[INFO] finished tweaking git repo https://github.com/Zarrko/InMemory-KVS
[INFO] tweaked toml for git repo https://github.com/Zarrko/InMemory-KVS written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Zarrko/InMemory-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/Zarrko/InMemory-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] [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] 6b2903cc87f4f3b4c4ccb3e1c7ab3a0bd6d05324b3ee826de0346ba0aae95301
[INFO] running `Command { std: "docker" "start" "-a" "6b2903cc87f4f3b4c4ccb3e1c7ab3a0bd6d05324b3ee826de0346ba0aae95301", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b2903cc87f4f3b4c4ccb3e1c7ab3a0bd6d05324b3ee826de0346ba0aae95301", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b2903cc87f4f3b4c4ccb3e1c7ab3a0bd6d05324b3ee826de0346ba0aae95301", kill_on_drop: false }`
[INFO] [stdout] 6b2903cc87f4f3b4c4ccb3e1c7ab3a0bd6d05324b3ee826de0346ba0aae95301
[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] e89ac81db55a8643a4345a66a39c6584040edf4d546435dc25e8926a1ab9ba0d
[INFO] running `Command { std: "docker" "start" "-a" "e89ac81db55a8643a4345a66a39c6584040edf4d546435dc25e8926a1ab9ba0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.218
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling serde_json v1.0.139
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ryu v1.0.19
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking log v0.4.25
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]    Compiling serde_derive v1.0.218
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking kvs-project v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `key` and `value` are never read
[INFO] [stdout]   --> src/bin/kvs.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Set {
[INFO] [stdout]    |     --- fields in this variant
[INFO] [stdout] 17 |         #[structopt(help = "A string key")]
[INFO] [stdout] 18 |         key: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 19 |         #[structopt(help = "The string value of the key")]
[INFO] [stdout] 20 |         value: 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:25:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     Get {
[INFO] [stdout]    |     --- field in this variant
[INFO] [stdout] 24 |         #[structopt(help = "A string key")]
[INFO] [stdout] 25 |         key: String,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `key` is never read
[INFO] [stdout]   --> src/bin/kvs.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     Remove {
[INFO] [stdout]    |     ------ field in this variant
[INFO] [stdout] 29 |         #[structopt(help = "A string key")]
[INFO] [stdout] 30 |         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:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | /         #[structopt(help = "A string key")]
[INFO] [stdout] 18 | |         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:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | /         #[structopt(help = "The string value of the key")]
[INFO] [stdout] 20 | |         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:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | /         #[structopt(help = "A string key")]
[INFO] [stdout] 25 | |         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:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 | /         #[structopt(help = "A string key")]
[INFO] [stdout] 30 | |         key: String,
[INFO] [stdout]    | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kvs-project` (bin "kvs") due to 4 previous errors; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e89ac81db55a8643a4345a66a39c6584040edf4d546435dc25e8926a1ab9ba0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e89ac81db55a8643a4345a66a39c6584040edf4d546435dc25e8926a1ab9ba0d", kill_on_drop: false }`
[INFO] [stdout] e89ac81db55a8643a4345a66a39c6584040edf4d546435dc25e8926a1ab9ba0d