`manual_slice_fill`: initializer must not reference the iterator

```rust
let mut tmp = vec![1, 2, 3];
for b in &mut tmp {
    *b = !*b;
}
```

must not suggest the invalid `tmp.fill(!*b)`.

2 files changed, 16 insertions, 0 deletions

diff --git a/tests/ui/manual_slice_fill.fixed b/tests/ui/manual_slice_fill.fixed
index 80e271117fc..bba863247f5 100644
--- a/tests/ui/manual_slice_fill.fixed
+++ b/tests/ui/manual_slice_fill.fixed
@@ -115,3 +115,11 @@ fn issue_14192() {
         tmp[0] = i;
     }
 }
+
+fn issue14189() {
+    // Should not lint because `!*b` is not constant
+    let mut tmp = vec![1, 2, 3];
+    for b in &mut tmp {
+        *b = !*b;
+    }
+}
diff --git a/tests/ui/manual_slice_fill.rs b/tests/ui/manual_slice_fill.rs
index f758f47bbcb..44c60dc40f0 100644
--- a/tests/ui/manual_slice_fill.rs
+++ b/tests/ui/manual_slice_fill.rs
@@ -128,3 +128,11 @@ fn issue_14192() {
         tmp[0] = i;
     }
 }
+
+fn issue14189() {
+    // Should not lint because `!*b` is not constant
+    let mut tmp = vec![1, 2, 3];
+    for b in &mut tmp {
+        *b = !*b;
+    }
+}