partial fix DECSTBM IL/DL

src/InputHandler.ts

@@ -847,6 +847,10 @@ export class InputHandler extends Disposable implements IInputHandler {
     // make buffer local for faster access
     const buffer = this._terminal.buffer;
 
+    if (buffer.y > buffer.scrollBottom || buffer.y < buffer.scrollTop) {
+      return;
+    }
+
     const row: number = buffer.y + buffer.ybase;
 
     const scrollBottomRowsOffset = this._terminal.rows - 1 - buffer.scrollBottom;
@@ -875,6 +879,10 @@ export class InputHandler extends Disposable implements IInputHandler {
     // make buffer local for faster access
     const buffer = this._terminal.buffer;
 
+    if (buffer.y > buffer.scrollBottom || buffer.y < buffer.scrollTop) {
+      return;
+    }
+
     const row: number = buffer.y + buffer.ybase;
 
     let j: number;