Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 87 insertions, 0 deletions

diff --git a/src/tools/clippy/tests/ui/read_zero_byte_vec.rs b/src/tools/clippy/tests/ui/read_zero_byte_vec.rs
new file mode 100644
index 000000000..30807e0f8
--- /dev/null
+++ b/src/tools/clippy/tests/ui/read_zero_byte_vec.rs
@@ -0,0 +1,87 @@
+#![warn(clippy::read_zero_byte_vec)]
+#![allow(clippy::unused_io_amount)]
+use std::fs::File;
+use std::io;
+use std::io::prelude::*;
+
+extern crate futures;
+use futures::io::{AsyncRead, AsyncReadExt};
+use tokio::io::{AsyncRead as TokioAsyncRead, AsyncReadExt as _, AsyncWrite as TokioAsyncWrite, AsyncWriteExt as _};
+
+fn test() -> io::Result<()> {
+    let cap = 1000;
+    let mut f = File::open("foo.txt").unwrap();
+
+    // should lint
+    let mut data = Vec::with_capacity(20);
+    f.read_exact(&mut data).unwrap();
+
+    // should lint
+    let mut data2 = Vec::with_capacity(cap);
+    f.read_exact(&mut data2)?;
+
+    // should lint
+    let mut data3 = Vec::new();
+    f.read_exact(&mut data3)?;
+
+    // should lint
+    let mut data4 = vec![];
+    let _ = f.read(&mut data4)?;
+
+    // should lint
+    let _ = {
+        let mut data5 = Vec::new();
+        f.read(&mut data5)
+    };
+
+    // should lint
+    let _ = {
+        let mut data6: Vec<u8> = Default::default();
+        f.read(&mut data6)
+    };
+
+    // should not lint
+    let mut buf = [0u8; 100];
+    f.read(&mut buf)?;
+
+    // should not lint
+    let mut empty = vec![];
+    let mut data7 = vec![];
+    f.read(&mut empty);
+
+    // should not lint
+    f.read(&mut data7);
+
+    // should not lint
+    let mut data8 = Vec::new();
+    data8.resize(100, 0);
+    f.read_exact(&mut data8)?;
+
+    // should not lint
+    let mut data9 = vec![1, 2, 3];
+    f.read_exact(&mut data9)?;
+
+    Ok(())
+}
+
+async fn test_futures<R: AsyncRead + Unpin>(r: &mut R) {
+    // should lint
+    let mut data = Vec::new();
+    r.read(&mut data).await.unwrap();
+
+    // should lint
+    let mut data2 = Vec::new();
+    r.read_exact(&mut data2).await.unwrap();
+}
+
+async fn test_tokio<R: TokioAsyncRead + Unpin>(r: &mut R) {
+    // should lint
+    let mut data = Vec::new();
+    r.read(&mut data).await.unwrap();
+
+    // should lint
+    let mut data2 = Vec::new();
+    r.read_exact(&mut data2).await.unwrap();
+}
+
+fn main() {}