[INFO] cloning repository https://github.com/dora-gt/sc4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dora-gt/sc4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdora-gt%2Fsc4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdora-gt%2Fsc4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 86acbf5950d1ecd4f06c8861d9c0bf40b3ff1205
[INFO] checking dora-gt/sc4 against try#438eb4c1a1c3841523d7f672601e8adbe04cff28 for pr-147589-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdora-gt%2Fsc4" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dora-gt/sc4
[INFO] finished tweaking git repo https://github.com/dora-gt/sc4
[INFO] tweaked toml for git repo https://github.com/dora-gt/sc4 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dora-gt/sc4 on toolchain 438eb4c1a1c3841523d7f672601e8adbe04cff28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dora-gt/sc4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded alfred v4.0.1
[INFO] [stderr]   Downloaded regex v1.1.6
[INFO] [stderr]   Downloaded memchr v2.2.0
[INFO] [stderr]   Downloaded aho-corasick v0.7.3
[INFO] [stderr]   Downloaded ryu v0.2.8
[INFO] [stderr]   Downloaded regex-syntax v0.6.6
[INFO] [stderr]   Downloaded serde v1.0.91
[INFO] [stderr]   Downloaded serde_json v1.0.39
[INFO] [stderr]   Downloaded libc v0.2.55
[INFO] [stderr]   Downloaded termion v1.5.2
[INFO] [stderr]   Downloaded redox_syscall v0.1.54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7d12324f44ca06d5ba033cea5101facd371ed9e3123215fa9be72c8680c11250
[INFO] running `Command { std: "docker" "start" "-a" "7d12324f44ca06d5ba033cea5101facd371ed9e3123215fa9be72c8680c11250", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d12324f44ca06d5ba033cea5101facd371ed9e3123215fa9be72c8680c11250", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d12324f44ca06d5ba033cea5101facd371ed9e3123215fa9be72c8680c11250", kill_on_drop: false }`
[INFO] [stdout] 7d12324f44ca06d5ba033cea5101facd371ed9e3123215fa9be72c8680c11250
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+438eb4c1a1c3841523d7f672601e8adbe04cff28" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 47209ce3e694cc73c4758885c1a37e185d12a0ee7d703af93598143a85607f5c
[INFO] running `Command { std: "docker" "start" "-a" "47209ce3e694cc73c4758885c1a37e185d12a0ee7d703af93598143a85607f5c", kill_on_drop: false }`
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]    Compiling serde v1.0.91
[INFO] [stderr]    Compiling libc v0.2.55
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking aho-corasick v0.7.3
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking alfred v4.0.1
[INFO] [stderr]     Checking sc4 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:13:42
[INFO] [stdout]    |
[INFO] [stdout] 13 |     static ref REGEX_SNAKE_CASE: Regex = { Regex::new("^[a-z]+((_[a-z]+)+$|$)").unwrap() };
[INFO] [stdout]    |                                          ^^                                             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 13 -     static ref REGEX_SNAKE_CASE: Regex = { Regex::new("^[a-z]+((_[a-z]+)+$|$)").unwrap() };
[INFO] [stdout] 13 +     static ref REGEX_SNAKE_CASE: Regex = Regex::new("^[a-z]+((_[a-z]+)+$|$)").unwrap() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:13:42
[INFO] [stdout]    |
[INFO] [stdout] 13 |     static ref REGEX_SNAKE_CASE: Regex = { Regex::new("^[a-z]+((_[a-z]+)+$|$)").unwrap() };
[INFO] [stdout]    |                                          ^^                                             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 13 -     static ref REGEX_SNAKE_CASE: Regex = { Regex::new("^[a-z]+((_[a-z]+)+$|$)").unwrap() };
[INFO] [stdout] 13 +     static ref REGEX_SNAKE_CASE: Regex = Regex::new("^[a-z]+((_[a-z]+)+$|$)").unwrap() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:14:42
[INFO] [stdout]    |
[INFO] [stdout] 14 |     static ref REGEX_CAMEL_CASE: Regex = { Regex::new("^([A-Z][a-z]*)+$").unwrap() };
[INFO] [stdout]    |                                          ^^                                       ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 14 -     static ref REGEX_CAMEL_CASE: Regex = { Regex::new("^([A-Z][a-z]*)+$").unwrap() };
[INFO] [stdout] 14 +     static ref REGEX_CAMEL_CASE: Regex = Regex::new("^([A-Z][a-z]*)+$").unwrap() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:15:42
[INFO] [stdout]    |
[INFO] [stdout] 15 |     static ref REGEX_KEBAB_CASE: Regex = { Regex::new("^[a-z]+((-[a-z]+)+$|$)").unwrap() };
[INFO] [stdout]    |                                          ^^                                             ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 15 -     static ref REGEX_KEBAB_CASE: Regex = { Regex::new("^[a-z]+((-[a-z]+)+$|$)").unwrap() };
[INFO] [stdout] 15 +     static ref REGEX_KEBAB_CASE: Regex = Regex::new("^[a-z]+((-[a-z]+)+$|$)").unwrap() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:16:53
[INFO] [stdout]    |
[INFO] [stdout] 16 |     static ref REGEX_CAMEL_CASE_BREAK_DOWN: Regex = { Regex::new("[A-Z][a-z]*").unwrap() };
[INFO] [stdout]    |                                                     ^^                                  ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 16 -     static ref REGEX_CAMEL_CASE_BREAK_DOWN: Regex = { Regex::new("[A-Z][a-z]*").unwrap() };
[INFO] [stdout] 16 +     static ref REGEX_CAMEL_CASE_BREAK_DOWN: Regex = Regex::new("[A-Z][a-z]*").unwrap() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:14:42
[INFO] [stdout]    |
[INFO] [stdout] 14 |     static ref REGEX_CAMEL_CASE: Regex = { Regex::new("^([A-Z][a-z]*)+$").unwrap() };
[INFO] [stdout]    |                                          ^^                                       ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 14 -     static ref REGEX_CAMEL_CASE: Regex = { Regex::new("^([A-Z][a-z]*)+$").unwrap() };
[INFO] [stdout] 14 +     static ref REGEX_CAMEL_CASE: Regex = Regex::new("^([A-Z][a-z]*)+$").unwrap() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:15:42
[INFO] [stdout]    |
[INFO] [stdout] 15 |     static ref REGEX_KEBAB_CASE: Regex = { Regex::new("^[a-z]+((-[a-z]+)+$|$)").unwrap() };
[INFO] [stdout]    |                                          ^^                                             ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 15 -     static ref REGEX_KEBAB_CASE: Regex = { Regex::new("^[a-z]+((-[a-z]+)+$|$)").unwrap() };
[INFO] [stdout] 15 +     static ref REGEX_KEBAB_CASE: Regex = Regex::new("^[a-z]+((-[a-z]+)+$|$)").unwrap() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/main.rs:16:53
[INFO] [stdout]    |
[INFO] [stdout] 16 |     static ref REGEX_CAMEL_CASE_BREAK_DOWN: Regex = { Regex::new("[A-Z][a-z]*").unwrap() };
[INFO] [stdout]    |                                                     ^^                                  ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout] 16 -     static ref REGEX_CAMEL_CASE_BREAK_DOWN: Regex = { Regex::new("[A-Z][a-z]*").unwrap() };
[INFO] [stdout] 16 +     static ref REGEX_CAMEL_CASE_BREAK_DOWN: Regex = Regex::new("[A-Z][a-z]*").unwrap() ;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/main.rs:119:32
[INFO] [stdout]     |
[INFO] [stdout] 119 |             _ => vec![self.text.borrow()],
[INFO] [stdout]     |                                ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Borrow`, so calling `borrow` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/main.rs:119:32
[INFO] [stdout]     |
[INFO] [stdout] 119 |             _ => vec![self.text.borrow()],
[INFO] [stdout]     |                                ^^^^^^^^^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `str` does not implement `Borrow`, so calling `borrow` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.69s
[INFO] running `Command { std: "docker" "inspect" "47209ce3e694cc73c4758885c1a37e185d12a0ee7d703af93598143a85607f5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47209ce3e694cc73c4758885c1a37e185d12a0ee7d703af93598143a85607f5c", kill_on_drop: false }`
[INFO] [stdout] 47209ce3e694cc73c4758885c1a37e185d12a0ee7d703af93598143a85607f5c