Merge ref 'b3cfb8faf84c' from rust-lang/rust

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: b3cfb8faf84c5f3b7909479a9f9b6a3290d5f4d7
Filtered ref: 8995aa7743caf019203bc853f27af6006705ae30
Upstream diff: https://github.com/rust-lang/rust/compare/9385c64c95d971329e62917adc4349c8ccdbafe0...b3cfb8faf84c5f3b7909479a9f9b6a3290d5f4d7

This merge was created using https://github.com/rust-lang/josh-sync.

1 files changed, 32 insertions, 0 deletions

diff --git a/src/tools/clippy/tests/ui/needless_range_loop.rs b/src/tools/clippy/tests/ui/needless_range_loop.rs
index 70cf9fa7369..ea4591d8b71 100644
--- a/src/tools/clippy/tests/ui/needless_range_loop.rs
+++ b/src/tools/clippy/tests/ui/needless_range_loop.rs
@@ -210,3 +210,35 @@ fn needless_loop() {
         black_box([1, 2, 3, 4, 5, 6, 7, 8][i]);
     }
 }
+
+fn issue_15068() {
+    let a = vec![vec![0u8; MAX_LEN]; MAX_LEN];
+    let b = vec![0u8; MAX_LEN];
+
+    for i in 0..MAX_LEN {
+        // no error
+        let _ = a[0][i];
+        let _ = b[i];
+    }
+
+    for i in 0..MAX_LEN {
+        // no error
+        let _ = a[i][0];
+        let _ = b[i];
+    }
+
+    for i in 0..MAX_LEN {
+        // no error
+        let _ = a[i][b[i] as usize];
+    }
+
+    for i in 0..MAX_LEN {
+        //~^ needless_range_loop
+        let _ = a[i][i];
+    }
+
+    for i in 0..MAX_LEN {
+        //~^ needless_range_loop
+        let _ = a[0][i];
+    }
+}