Replace assert_matches with nightly std version

Author: games647

Cargo.toml

@@ -67,9 +67,6 @@ features = ["color", "derive", "std", "cargo"]
 
 # Dependencies for dev environments like tests and benchmarks
 [dev-dependencies]
-# Allows asserting to patterns - in this case easier for using assert_eq with nightly APIs
-assert_matches = "1.4"
-
 # Benchmarking tool, because #[bench] is a nightly only feature at the moment
 # Source: https://doc.rust-lang.org/cargo/commands/cargo-bench.html
 criterion = "0.3"

src/find/advise.rs

@@ -116,7 +116,6 @@ impl Error for FAdviseError {}
 mod test {
     use std::{os::unix::io::FromRawFd, panic, ptr};
 
-    use assert_matches::assert_matches;
     use memmap::MmapOptions;
 
     use super::*;

src/find/parse.rs

@@ -99,7 +99,6 @@ impl From<ParseIntError> for ParseHashError {
 mod test {
     use std::convert::TryInto;
 
-    use assert_matches::assert_matches;
     use data_encoding::HEXUPPER;
 
     use crate::find::SIMD_WIDTH;

src/main.rs

@@ -1,3 +1,5 @@
+#![feature(assert_matches)]
+
 use std::{fs::File, io::Read};
 
 use clap::{crate_description, crate_name, crate_version, App, Arg};
@@ -88,7 +90,6 @@ mod logger;
 #[cfg(test)]
 mod test {
     use super::*;
-    use assert_matches::assert_matches;
 
     #[test]
     fn test_parse() {