[INFO] cloning repository https://github.com/lazear/kv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lazear/kv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flazear%2Fkv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flazear%2Fkv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d5630bf93e2cced8d929d5da6b6c94aa5dfdc3d
[INFO] testing lazear/kv against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flazear%2Fkv" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lazear/kv on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lazear/kv
[INFO] finished tweaking git repo https://github.com/lazear/kv
[INFO] tweaked toml for git repo https://github.com/lazear/kv written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/lazear/kv already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-4/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4933d5616f0e74d115f574a56166413e157a4f070d7da29c91a627eab1ee19ba
[INFO] running `Command { std: "docker" "start" "-a" "4933d5616f0e74d115f574a56166413e157a4f070d7da29c91a627eab1ee19ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4933d5616f0e74d115f574a56166413e157a4f070d7da29c91a627eab1ee19ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4933d5616f0e74d115f574a56166413e157a4f070d7da29c91a627eab1ee19ba", kill_on_drop: false }`
[INFO] [stdout] 4933d5616f0e74d115f574a56166413e157a4f070d7da29c91a627eab1ee19ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 973a24272e8ba49c9ae14a8bed87615202d08cb9ca66d843ea479cc5409f9adf
[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" "973a24272e8ba49c9ae14a8bed87615202d08cb9ca66d843ea479cc5409f9adf", kill_on_drop: false }`
[INFO] [stderr]    Compiling kv v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:106:36
[INFO] [stdout]     |
[INFO] [stdout] 106 |     ) -> Result<Option<Value>, Box<std::error::Error>> {
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:216:37
[INFO] [stdout]     |
[INFO] [stdout] 216 | ...                   let mut response: Option<Value> = match cmd {
[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/main.rs:246:45
[INFO] [stdout]     |
[INFO] [stdout] 246 | ...                   if let Some(mut r) = response {
[INFO] [stdout]     |                                   ----^
[INFO] [stdout]     |                                   |
[INFO] [stdout]     |                                   help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.35s
[INFO] running `Command { std: "docker" "inspect" "973a24272e8ba49c9ae14a8bed87615202d08cb9ca66d843ea479cc5409f9adf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "973a24272e8ba49c9ae14a8bed87615202d08cb9ca66d843ea479cc5409f9adf", kill_on_drop: false }`
[INFO] [stdout] 973a24272e8ba49c9ae14a8bed87615202d08cb9ca66d843ea479cc5409f9adf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=warn" "-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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6234a018bbf571c9ed585054f16e8573bb43089e1dd59306b6adcb796db1b4e6
[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" "6234a018bbf571c9ed585054f16e8573bb43089e1dd59306b6adcb796db1b4e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling kv v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0425]: cannot find function `encode` in this scope
[INFO] [stdout]    --> src/parser.rs:135:13
[INFO] [stdout]     |
[INFO] [stdout] 135 |             encode(&Value::Array(vec![
[INFO] [stdout]     |             ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:106:36
[INFO] [stdout]     |
[INFO] [stdout] 106 |     ) -> Result<Option<Value>, Box<std::error::Error>> {
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `kv`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "6234a018bbf571c9ed585054f16e8573bb43089e1dd59306b6adcb796db1b4e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6234a018bbf571c9ed585054f16e8573bb43089e1dd59306b6adcb796db1b4e6", kill_on_drop: false }`
[INFO] [stdout] 6234a018bbf571c9ed585054f16e8573bb43089e1dd59306b6adcb796db1b4e6