[INFO] fetching crate rato 0.1.2...
[INFO] testing rato-0.1.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate rato 0.1.2 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate rato 0.1.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rato 0.1.2
[INFO] finished tweaking crates.io crate rato 0.1.2
[INFO] tweaked toml for crates.io crate rato 0.1.2 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba6a03f6e16f4ff849b81f68e72721e34ee64f70062f429cd20e9f8810ce6ac1
[INFO] running `Command { std: "docker" "start" "-a" "ba6a03f6e16f4ff849b81f68e72721e34ee64f70062f429cd20e9f8810ce6ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba6a03f6e16f4ff849b81f68e72721e34ee64f70062f429cd20e9f8810ce6ac1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba6a03f6e16f4ff849b81f68e72721e34ee64f70062f429cd20e9f8810ce6ac1", kill_on_drop: false }`
[INFO] [stdout] ba6a03f6e16f4ff849b81f68e72721e34ee64f70062f429cd20e9f8810ce6ac1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d678f62a968102863b21d96468b31729ffedecae1a7f4937fb29e5deb784afe6
[INFO] running `Command { std: "docker" "start" "-a" "d678f62a968102863b21d96468b31729ffedecae1a7f4937fb29e5deb784afe6", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling hashbrown v0.1.8
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling rato v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/rato.rs:414:17
[INFO] [stdout]     |
[INFO] [stdout] 414 | /                 (if let Err(e) = event_handler.on_cmd_flushdb(&db) {
[INFO] [stdout] 415 | |                     format!("-ERR FLUSHDB Failed '{}'\r\n", e.to_string())
[INFO] [stdout] 416 | |                         .into_bytes()
[INFO] [stdout] 417 | |                         .to_vec()
[INFO] [stdout] 418 | |                 } else {
[INFO] [stdout] 419 | |                     b"+OK\r\n".to_vec()
[INFO] [stdout] 420 | |                 })
[INFO] [stdout]     | |__________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 414 |                 if let Err(e) = event_handler.on_cmd_flushdb(&db) {
[INFO] [stdout] 415 |                     format!("-ERR FLUSHDB Failed '{}'\r\n", e.to_string())
[INFO] [stdout] 416 |                         .into_bytes()
[INFO] [stdout] 417 |                         .to_vec()
[INFO] [stdout] 418 |                 } else {
[INFO] [stdout] 419 |                     b"+OK\r\n".to_vec()
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/rato.rs:423:17
[INFO] [stdout]     |
[INFO] [stdout] 423 | /                 (match args.len() {
[INFO] [stdout] 424 | |                     1 => {
[INFO] [stdout] 425 | |                         if let Err(e) = event_handler.on_cmd_backupdb(&[]) {
[INFO] [stdout] 426 | |                             format!("-ERR Backup DB Failed '{}'\r\n", e.to_string())
[INFO] [stdout] ...   |
[INFO] [stdout] 442 | |                     _ => RedisUtil::invalid_num_args(&args[0]),
[INFO] [stdout] 443 | |                 })
[INFO] [stdout]     | |__________________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 423 |                 match args.len() {
[INFO] [stdout] 424 |                     1 => {
[INFO] [stdout] 425 |                         if let Err(e) = event_handler.on_cmd_backupdb(&[]) {
[INFO] [stdout] 426 |                             format!("-ERR Backup DB Failed '{}'\r\n", e.to_string())
[INFO] [stdout] 427 |                                 .into_bytes()
[INFO] [stdout] 428 |                                 .to_vec()
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/rato.rs:446:17
[INFO] [stdout]     |
[INFO] [stdout] 446 | /                 (match args.len() {
[INFO] [stdout] 447 | |                     1 => {
[INFO] [stdout] 448 | |                         if let Err(e) = event_handler.on_cmd_backup_lru_keys(&[]) {
[INFO] [stdout] 449 | |                             format!(
[INFO] [stdout] ...   |
[INFO] [stdout] 471 | |                     _ => RedisUtil::invalid_num_args(&args[0]),
[INFO] [stdout] 472 | |                 })
[INFO] [stdout]     | |__________________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 446 |                 match args.len() {
[INFO] [stdout] 447 |                     1 => {
[INFO] [stdout] 448 |                         if let Err(e) = event_handler.on_cmd_backup_lru_keys(&[]) {
[INFO] [stdout] 449 |                             format!(
[INFO] [stdout] 450 |                                 "-ERR BACKUP_LRU_KEYS Lru Keys Failed '{}'\r\n",
[INFO] [stdout] 451 |                                 e.to_string()
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.38s
[INFO] running `Command { std: "docker" "inspect" "d678f62a968102863b21d96468b31729ffedecae1a7f4937fb29e5deb784afe6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d678f62a968102863b21d96468b31729ffedecae1a7f4937fb29e5deb784afe6", kill_on_drop: false }`
[INFO] [stdout] d678f62a968102863b21d96468b31729ffedecae1a7f4937fb29e5deb784afe6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e4a802ebb882857811c6dc2f1ff3dfc56ce08b420b60a9993ae2e07cd015bfe0
[INFO] running `Command { std: "docker" "start" "-a" "e4a802ebb882857811c6dc2f1ff3dfc56ce08b420b60a9993ae2e07cd015bfe0", kill_on_drop: false }`
[INFO] [stderr]    Compiling rato v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/rato.rs:414:17
[INFO] [stdout]     |
[INFO] [stdout] 414 | /                 (if let Err(e) = event_handler.on_cmd_flushdb(&db) {
[INFO] [stdout] 415 | |                     format!("-ERR FLUSHDB Failed '{}'\r\n", e.to_string())
[INFO] [stdout] 416 | |                         .into_bytes()
[INFO] [stdout] 417 | |                         .to_vec()
[INFO] [stdout] 418 | |                 } else {
[INFO] [stdout] 419 | |                     b"+OK\r\n".to_vec()
[INFO] [stdout] 420 | |                 })
[INFO] [stdout]     | |__________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 414 |                 if let Err(e) = event_handler.on_cmd_flushdb(&db) {
[INFO] [stdout] 415 |                     format!("-ERR FLUSHDB Failed '{}'\r\n", e.to_string())
[INFO] [stdout] 416 |                         .into_bytes()
[INFO] [stdout] 417 |                         .to_vec()
[INFO] [stdout] 418 |                 } else {
[INFO] [stdout] 419 |                     b"+OK\r\n".to_vec()
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/rato.rs:423:17
[INFO] [stdout]     |
[INFO] [stdout] 423 | /                 (match args.len() {
[INFO] [stdout] 424 | |                     1 => {
[INFO] [stdout] 425 | |                         if let Err(e) = event_handler.on_cmd_backupdb(&[]) {
[INFO] [stdout] 426 | |                             format!("-ERR Backup DB Failed '{}'\r\n", e.to_string())
[INFO] [stdout] ...   |
[INFO] [stdout] 442 | |                     _ => RedisUtil::invalid_num_args(&args[0]),
[INFO] [stdout] 443 | |                 })
[INFO] [stdout]     | |__________________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 423 |                 match args.len() {
[INFO] [stdout] 424 |                     1 => {
[INFO] [stdout] 425 |                         if let Err(e) = event_handler.on_cmd_backupdb(&[]) {
[INFO] [stdout] 426 |                             format!("-ERR Backup DB Failed '{}'\r\n", e.to_string())
[INFO] [stdout] 427 |                                 .into_bytes()
[INFO] [stdout] 428 |                                 .to_vec()
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/rato.rs:446:17
[INFO] [stdout]     |
[INFO] [stdout] 446 | /                 (match args.len() {
[INFO] [stdout] 447 | |                     1 => {
[INFO] [stdout] 448 | |                         if let Err(e) = event_handler.on_cmd_backup_lru_keys(&[]) {
[INFO] [stdout] 449 | |                             format!(
[INFO] [stdout] ...   |
[INFO] [stdout] 471 | |                     _ => RedisUtil::invalid_num_args(&args[0]),
[INFO] [stdout] 472 | |                 })
[INFO] [stdout]     | |__________________^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 446 |                 match args.len() {
[INFO] [stdout] 447 |                     1 => {
[INFO] [stdout] 448 |                         if let Err(e) = event_handler.on_cmd_backup_lru_keys(&[]) {
[INFO] [stdout] 449 |                             format!(
[INFO] [stdout] 450 |                                 "-ERR BACKUP_LRU_KEYS Lru Keys Failed '{}'\r\n",
[INFO] [stdout] 451 |                                 e.to_string()
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `env_logger`
[INFO] [stdout]   --> src/lib.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     extern crate env_logger;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rato` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "e4a802ebb882857811c6dc2f1ff3dfc56ce08b420b60a9993ae2e07cd015bfe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4a802ebb882857811c6dc2f1ff3dfc56ce08b420b60a9993ae2e07cd015bfe0", kill_on_drop: false }`
[INFO] [stdout] e4a802ebb882857811c6dc2f1ff3dfc56ce08b420b60a9993ae2e07cd015bfe0