Add test to ensure that suggestions are only emitted if MSRV supports it

tests/ui/cast.rs

@@ -569,3 +569,16 @@ fn issue12721() {
     (255 % 999999u64) as u8;
     //~^ cast_possible_truncation
 }
+
+mod issue14150 {
+    #[clippy::msrv = "1.87"]
+    fn msrv_supports_cast_signed() {
+        _ = 1u8 as i8;
+        //~^ cast_possible_wrap
+    }
+    #[clippy::msrv = "1.86"]
+    fn msrv_doesnt_supports_cast_signed() {
+        _ = 1u8 as i8;
+        //~^ cast_possible_wrap
+    }
+}

tests/ui/cast.stderr

@@ -752,5 +752,17 @@ LL -     (255 % 999999u64) as u8;
 LL +     u8::try_from(255 % 999999u64);
    |
 
-error: aborting due to 92 previous errors
+error: casting `u8` to `i8` may wrap around the value
+  --> tests/ui/cast.rs:576:13
+   |
+LL |         _ = 1u8 as i8;
+   |             ^^^^^^^^^ help: if this is intentional, consider using `cast_signed()` instead: `1u8.cast_signed()`
+
+error: casting `u8` to `i8` may wrap around the value
+  --> tests/ui/cast.rs:581:13
+   |
+LL |         _ = 1u8 as i8;
+   |             ^^^^^^^^^
+
+error: aborting due to 94 previous errors