[INFO] updating cached repository lazear/kv
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lazear/kv
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lazear/kv" "work/ex/beta-1.38-1/sources/1.37.0/gh/lazear/kv"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lazear/kv'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lazear/kv" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lazear/kv"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lazear/kv'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7d5630bf93e2cced8d929d5da6b6c94aa5dfdc3d
[INFO] sha for GitHub repo lazear/kv: 7d5630bf93e2cced8d929d5da6b6c94aa5dfdc3d
[INFO] validating manifest of lazear/kv on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of lazear/kv on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing lazear/kv
[INFO] finished frobbing lazear/kv
[INFO] frobbed toml for lazear/kv written to work/ex/beta-1.38-1/sources/1.37.0/gh/lazear/kv/Cargo.toml
[INFO] started frobbing lazear/kv
[INFO] finished frobbing lazear/kv
[INFO] frobbed toml for lazear/kv written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lazear/kv/Cargo.toml
[INFO] crate lazear/kv already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/lazear/kv/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing lazear/kv against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lazear/kv:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] a230e457349d681b86e677c0d55f1148cf1ad9d9933d8d4106b6b6a2b9d919d9
[INFO] running `"docker" "start" "-a" "a230e457349d681b86e677c0d55f1148cf1ad9d9933d8d4106b6b6a2b9d919d9"`
[INFO] [stderr]    Compiling kv v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:106:36
[INFO] [stderr]     |
[INFO] [stderr] 106 |     ) -> Result<Option<Value>, Box<std::error::Error>> {
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:216:37
[INFO] [stderr]     |
[INFO] [stderr] 216 |                                 let mut response: Option<Value> = match cmd {
[INFO] [stderr]     |                                     ----^^^^^^^^
[INFO] [stderr]     |                                     |
[INFO] [stderr]     |                                     help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:246:45
[INFO] [stderr]     |
[INFO] [stderr] 246 |                                 if let Some(mut r) = response {
[INFO] [stderr]     |                                             ----^
[INFO] [stderr]     |                                             |
[INFO] [stderr]     |                                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.70s
[INFO] running `"docker" "inspect" "a230e457349d681b86e677c0d55f1148cf1ad9d9933d8d4106b6b6a2b9d919d9"`
[INFO] running `"docker" "rm" "-f" "a230e457349d681b86e677c0d55f1148cf1ad9d9933d8d4106b6b6a2b9d919d9"`
[INFO] [stdout] a230e457349d681b86e677c0d55f1148cf1ad9d9933d8d4106b6b6a2b9d919d9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lazear/kv:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 494b9f25d34faffaa20ce2ceaa1a27d01d494eedf4adc61856fd0db3658eb08b
[INFO] running `"docker" "start" "-a" "494b9f25d34faffaa20ce2ceaa1a27d01d494eedf4adc61856fd0db3658eb08b"`
[INFO] [stderr]    Compiling kv v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0425]: cannot find function `encode` in this scope
[INFO] [stderr]    --> src/parser.rs:135:13
[INFO] [stderr]     |
[INFO] [stderr] 135 |             encode(&Value::Array(vec![
[INFO] [stderr]     |             ^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:106:36
[INFO] [stderr]     |
[INFO] [stderr] 106 |     ) -> Result<Option<Value>, Box<std::error::Error>> {
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `kv`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "494b9f25d34faffaa20ce2ceaa1a27d01d494eedf4adc61856fd0db3658eb08b"`
[INFO] running `"docker" "rm" "-f" "494b9f25d34faffaa20ce2ceaa1a27d01d494eedf4adc61856fd0db3658eb08b"`
[INFO] [stdout] 494b9f25d34faffaa20ce2ceaa1a27d01d494eedf4adc61856fd0db3658eb08b