Patch for node-oracledb 5.2 issue #1391

issue1391.patch

diff --git a/lib/queryStream.js b/lib/queryStream.js
index 08ddc72..09efc99 100644
--- a/lib/queryStream.js
+++ b/lib/queryStream.js
@@ -89,11 +89,6 @@ class QueryStream extends Readable {
       this._fetching = true;
       this._resultSet._allowGetRowCall = true;
       const row = await this._resultSet.getRow();
-      this._fetching = false;
-      if (!this._resultSet) {
-        this.emit('_doneFetching');
-        return;
-      }
       if (row) {
         this.push(row);
       } else {
@@ -101,6 +96,13 @@ class QueryStream extends Readable {
       }
     } catch (err) {
       this.destroy(err);
+    } finally {
+      this._fetching = false;
+      if (this.resultSet) {
+        this._resultSet._allowGetRowCall = false;
+      } else {
+        this.emit('_doneFetching');
+      }
     }
   }