Fix Stacked Borrows violations in crate

.github/workflows/ci.yml

@@ -51,6 +51,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Miri
-        run: ci/miri.sh
-
+      - name: Install Miri
+        run: |
+          rustup toolchain install nightly --component miri
+          rustup override set nightly
+          cargo miri setup
+      - name: Test with Miri
+        run: cargo miri test

benches/arraystring.rs

@@ -1,6 +1,6 @@
-
 extern crate arrayvec;
-#[macro_use] extern crate bencher;
+#[macro_use]
+extern crate bencher;
 
 use arrayvec::ArrayString;
 
@@ -10,8 +10,7 @@ fn try_push_c(b: &mut Bencher) {
     let mut v = ArrayString::<512>::new();
     b.iter(|| {
         v.clear();
-        while v.try_push('c').is_ok() {
-        }
+        while v.try_push('c').is_ok() {}
         v.len()
     });
     b.bytes = v.capacity() as u64;
@@ -21,8 +20,7 @@ fn try_push_alpha(b: &mut Bencher) {
     let mut v = ArrayString::<512>::new();
     b.iter(|| {
         v.clear();
-        while v.try_push('α').is_ok() {
-        }
+        while v.try_push('α').is_ok() {}
         v.len()
     });
     b.bytes = v.capacity() as u64;
@@ -85,6 +83,13 @@ fn push_string(b: &mut Bencher) {
     b.bytes = v.capacity() as u64;
 }
 
-benchmark_group!(benches, try_push_c, try_push_alpha, try_push_string, push_c,
-                 push_alpha, push_string);
+benchmark_group!(
+    benches,
+    try_push_c,
+    try_push_alpha,
+    try_push_string,
+    push_c,
+    push_alpha,
+    push_string
+);
 benchmark_main!(benches);

benches/extend.rs

@@ -1,13 +1,13 @@
-
 extern crate arrayvec;
-#[macro_use] extern crate bencher;
+#[macro_use]
+extern crate bencher;
 
 use std::io::Write;
 
 use arrayvec::ArrayVec;
 
-use bencher::Bencher;
 use bencher::black_box;
+use bencher::Bencher;
 
 fn extend_with_constant(b: &mut Bencher) {
     let mut v = ArrayVec::<u8, 512>::new();
@@ -67,12 +67,13 @@ fn extend_from_slice(b: &mut Bencher) {
     b.bytes = v.capacity() as u64;
 }
 
-benchmark_group!(benches,
-                 extend_with_constant,
-                 extend_with_range,
-                 extend_with_slice,
-                 extend_with_write,
-                 extend_from_slice
+benchmark_group!(
+    benches,
+    extend_with_constant,
+    extend_with_range,
+    extend_with_slice,
+    extend_with_write,
+    extend_from_slice
 );
 
 benchmark_main!(benches);