Prevent scrollback setOption < 0

Fixes xtermjs#911
Tyriar · Aug 21, 2017 · 877e1e5 · 877e1e5
1 parent abe3227
commit 877e1e5
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/Terminal.ts b/src/Terminal.ts
@@ -454,6 +454,10 @@ export class Terminal extends EventEmitter implements ITerminal, IInputHandlingT
         }
         break;
       case 'scrollback':
+        if (value < 0) {
+          console.warn(`scrollback cannot be less than 0, value: ${value}`);
+          return;
+        }
         if (this.options[key] !== value) {
           const newBufferLength = this.rows + value;
           if (this.buffer.lines.length > newBufferLength) {