[INFO] updating cached repository tonis2/small-rust-database
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tonis2/small-rust-database
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tonis2/small-rust-database" "work/ex/beta-1.37-6/sources/1.36.0/gh/tonis2/small-rust-database"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/tonis2/small-rust-database'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tonis2/small-rust-database" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tonis2/small-rust-database"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tonis2/small-rust-database'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 03b203bd21df57cfdb6fb96b150741f3a16d27f8
[INFO] sha for GitHub repo tonis2/small-rust-database: 03b203bd21df57cfdb6fb96b150741f3a16d27f8
[INFO] validating manifest of tonis2/small-rust-database on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tonis2/small-rust-database on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tonis2/small-rust-database
[INFO] finished frobbing tonis2/small-rust-database
[INFO] frobbed toml for tonis2/small-rust-database written to work/ex/beta-1.37-6/sources/1.36.0/gh/tonis2/small-rust-database/Cargo.toml
[INFO] started frobbing tonis2/small-rust-database
[INFO] finished frobbing tonis2/small-rust-database
[INFO] frobbed toml for tonis2/small-rust-database written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tonis2/small-rust-database/Cargo.toml
[INFO] crate tonis2/small-rust-database already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tonis2/small-rust-database against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tonis2/small-rust-database:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 2a5e688f565cb75bf45f5df27310fafba65668a626824accb00d7c012315aa79
[INFO] running `"docker" "start" "-a" "2a5e688f565cb75bf45f5df27310fafba65668a626824accb00d7c012315aa79"`
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling quote v0.6.4
[INFO] [stderr]    Compiling bytes v0.4.8
[INFO] [stderr]    Compiling bincode v0.6.1
[INFO] [stderr]    Compiling syn v0.14.6
[INFO] [stderr]    Compiling http v0.1.5
[INFO] [stderr]    Compiling btree v0.1.0 (https://github.com/tonis2/btree#b7ac51db)
[INFO] [stderr]    Compiling rustyline v1.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.70
[INFO] [stderr]    Compiling simple-server v0.3.0
[INFO] [stderr]    Compiling small-rust-database v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/main.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `basic_server` should have an upper camel case name
[INFO] [stderr]  --> src/server.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct basic_server;
[INFO] [stderr]   |            ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `BasicServer`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `host`
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let host = "127.0.0.1".to_string();
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_host`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `port`
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let port = "7878".to_string();
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_port`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `entry`
[INFO] [stderr]   --> src/database/mod.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn command_exec(entry: CommandEntry) {
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_entry`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]  --> src/database/database.rs:8:17
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn open(path: &String) -> System {
[INFO] [stderr]   |                 ^^^^ help: consider prefixing with an underscore: `_path`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `System`
[INFO] [stderr]  --> src/database/database.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct System {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `open`
[INFO] [stderr]  --> src/database/database.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn open(path: &String) -> System {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/database/database.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn add(mut self, _value: &str) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `basic_server`
[INFO] [stderr]  --> src/server.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct basic_server;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `listen`
[INFO] [stderr]  --> src/server.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn listen(host: String, port: String) {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.23s
[INFO] running `"docker" "inspect" "2a5e688f565cb75bf45f5df27310fafba65668a626824accb00d7c012315aa79"`
[INFO] running `"docker" "rm" "-f" "2a5e688f565cb75bf45f5df27310fafba65668a626824accb00d7c012315aa79"`
[INFO] [stdout] 2a5e688f565cb75bf45f5df27310fafba65668a626824accb00d7c012315aa79
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tonis2/small-rust-database:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 53b82c588b7c07be493924406150e3127c5f833a0f3ec600d0cbc6e58d18f4c3
[INFO] running `"docker" "start" "-a" "53b82c588b7c07be493924406150e3127c5f833a0f3ec600d0cbc6e58d18f4c3"`
[INFO] [stderr]    Compiling small-rust-database v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/main.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/main.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `basic_server` should have an upper camel case name
[INFO] [stderr]  --> src/server.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct basic_server;
[INFO] [stderr]   |            ^^^^^^^^^^^^ help: convert the identifier to upper camel case: `BasicServer`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `host`
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let host = "127.0.0.1".to_string();
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_host`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `port`
[INFO] [stderr]   --> src/main.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let port = "7878".to_string();
[INFO] [stderr]    |         ^^^^ help: consider prefixing with an underscore: `_port`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `entry`
[INFO] [stderr]   --> src/database/mod.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 | fn command_exec(entry: CommandEntry) {
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_entry`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `path`
[INFO] [stderr]  --> src/database/database.rs:8:17
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn open(path: &String) -> System {
[INFO] [stderr]   |                 ^^^^ help: consider prefixing with an underscore: `_path`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `System`
[INFO] [stderr]  --> src/database/database.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct System {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `open`
[INFO] [stderr]  --> src/database/database.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn open(path: &String) -> System {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/database/database.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn add(mut self, _value: &str) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `basic_server`
[INFO] [stderr]  --> src/server.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct basic_server;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `listen`
[INFO] [stderr]  --> src/server.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub fn listen(host: String, port: String) {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `"docker" "inspect" "53b82c588b7c07be493924406150e3127c5f833a0f3ec600d0cbc6e58d18f4c3"`
[INFO] running `"docker" "rm" "-f" "53b82c588b7c07be493924406150e3127c5f833a0f3ec600d0cbc6e58d18f4c3"`
[INFO] [stdout] 53b82c588b7c07be493924406150e3127c5f833a0f3ec600d0cbc6e58d18f4c3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tonis2/small-rust-database:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 31e80c9b04b26e0c5e95db7e2a92a4edaf561091327aa5e32ac3101a34f7885f
[INFO] running `"docker" "start" "-a" "31e80c9b04b26e0c5e95db7e2a92a4edaf561091327aa5e32ac3101a34f7885f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/small_rust_database-f0bd962a9de549dd
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "31e80c9b04b26e0c5e95db7e2a92a4edaf561091327aa5e32ac3101a34f7885f"`
[INFO] running `"docker" "rm" "-f" "31e80c9b04b26e0c5e95db7e2a92a4edaf561091327aa5e32ac3101a34f7885f"`
[INFO] [stdout] 31e80c9b04b26e0c5e95db7e2a92a4edaf561091327aa5e32ac3101a34f7885f