[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#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fx-hansong%2Fkvs" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/x-hansong/kvs on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-2/source/Cargo.toml
[INFO] crate git repo https://github.com/x-hansong/kvs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 603d566261fb2da1f81d2aff903cfe19cc95d71071db3a432477075c8077e398
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "603d566261fb2da1f81d2aff903cfe19cc95d71071db3a432477075c8077e398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "603d566261fb2da1f81d2aff903cfe19cc95d71071db3a432477075c8077e398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "603d566261fb2da1f81d2aff903cfe19cc95d71071db3a432477075c8077e398", kill_on_drop: false }`
[INFO] [stdout] 603d566261fb2da1f81d2aff903cfe19cc95d71071db3a432477075c8077e398
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f5c94493e7a6bfa4426f84245a96e66bb6ca243f3633e88d98f7c434d030c7d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3f5c94493e7a6bfa4426f84245a96e66bb6ca243f3633e88d98f7c434d030c7d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling serde_json v1.0.62
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]     Checking textwrap v0.12.1
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]     Checking float-cmp v0.8.0
[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 escargot v0.4.0
[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)]` 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: 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)]` 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 is never read: `key`
[INFO] [stdout]   --> src/bin/kvs.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     key: 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: `key`
[INFO] [stdout]   --> src/bin/kvs.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     key: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `key`
[INFO] [stdout]   --> src/bin/kvs.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     key: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/bin/kvs.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     value: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `key`
[INFO] [stdout]   --> src/bin/kvs.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     key: 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: `key`
[INFO] [stdout]   --> src/bin/kvs.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     key: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `key`
[INFO] [stdout]   --> src/bin/kvs.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     key: String,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/bin/kvs.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 |     value: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.18s
[INFO] running `Command { std: "docker" "inspect" "3f5c94493e7a6bfa4426f84245a96e66bb6ca243f3633e88d98f7c434d030c7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f5c94493e7a6bfa4426f84245a96e66bb6ca243f3633e88d98f7c434d030c7d", kill_on_drop: false }`
[INFO] [stdout] 3f5c94493e7a6bfa4426f84245a96e66bb6ca243f3633e88d98f7c434d030c7d