[INFO] cloning repository https://github.com/sbh123/labkv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sbh123/labkv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsbh123%2Flabkv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsbh123%2Flabkv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3400008d059a99801fe2164ca54dab09fb56b9a6
[INFO] checking sbh123/labkv against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsbh123%2Flabkv" "/workspace/builds/worker-95/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-95/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sbh123/labkv on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sbh123/labkv
[INFO] finished tweaking git repo https://github.com/sbh123/labkv
[INFO] tweaked toml for git repo https://github.com/sbh123/labkv written to /workspace/builds/worker-95/source/Cargo.toml
[INFO] crate git repo https://github.com/sbh123/labkv already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8dc2ec0c0e62ee907792f23bc6a5ff902cbb02164ce6139cc8eeeb6974a46b4
[INFO] running `Command { std: "docker" "start" "-a" "d8dc2ec0c0e62ee907792f23bc6a5ff902cbb02164ce6139cc8eeeb6974a46b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8dc2ec0c0e62ee907792f23bc6a5ff902cbb02164ce6139cc8eeeb6974a46b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8dc2ec0c0e62ee907792f23bc6a5ff902cbb02164ce6139cc8eeeb6974a46b4", kill_on_drop: false }`
[INFO] [stdout] d8dc2ec0c0e62ee907792f23bc6a5ff902cbb02164ce6139cc8eeeb6974a46b4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f6e33636cafd9234a6d914ab0b5f6fbb576c967be64a980709e96dd3b67a934b
[INFO] running `Command { std: "docker" "start" "-a" "f6e33636cafd9234a6d914ab0b5f6fbb576c967be64a980709e96dd3b67a934b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]    Compiling syn v0.15.22
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking serde_json v1.0.33
[INFO] [stderr]     Checking uuid v0.7.1
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]     Checking labkv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/raft.rs:262:43
[INFO] [stdout]     |
[INFO] [stdout] 262 |             RaftError::Io(ref err) => err.description(),
[INFO] [stdout]     |                                           ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/raft.rs:262:43
[INFO] [stdout]     |
[INFO] [stdout] 262 |             RaftError::Io(ref err) => err.description(),
[INFO] [stdout]     |                                           ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/raft.rs:689:25
[INFO] [stdout]     |
[INFO] [stdout] 689 |                     let mut raft = raft.lock().unwrap();
[INFO] [stdout]     |                         ----^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/raft.rs:689:25
[INFO] [stdout]     |
[INFO] [stdout] 689 |                     let mut raft = raft.lock().unwrap();
[INFO] [stdout]     |                         ----^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `servername`
[INFO] [stdout]    --> src/rpc.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 119 |     servername: String,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `servername`
[INFO] [stdout]    --> src/rpc.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 119 |     servername: String,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.39s
[INFO] running `Command { std: "docker" "inspect" "f6e33636cafd9234a6d914ab0b5f6fbb576c967be64a980709e96dd3b67a934b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6e33636cafd9234a6d914ab0b5f6fbb576c967be64a980709e96dd3b67a934b", kill_on_drop: false }`
[INFO] [stdout] f6e33636cafd9234a6d914ab0b5f6fbb576c967be64a980709e96dd3b67a934b