chore(raw_sql): create regression test

Author: abonander

sqlx-core/src/raw_sql.rs

@@ -267,3 +267,25 @@ impl<'q> RawSql<'q> {
         executor.fetch_one(self).await
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use sqlx::{Connection, SqliteConnection};
+
+    #[test]
+    fn issue_3150() {
+        tokio::runtime::Builder::new_current_thread()
+            .enable_all()
+            .build()
+            .unwrap()
+            .block_on(async {
+                tokio::spawn(async {
+                    let mut db = SqliteConnection::connect(":memory:").await.unwrap();
+                    sqlx::raw_sql("").execute(&mut db).await.unwrap();
+                    db.close().await.unwrap();
+                })
+                .await
+            })
+            .ok();
+    }
+}