message: Prevent a crash when processing degenerate char dimensions.
diff: @@ -565,6 +565,9 @@ export class TerminalViewer extends ViewerElement implements Commandable, keybin
  const charHeight = this._aceEditor.renderer.lineHeight;
  const charWidth = this._aceEditor.renderer.characterWidth;
  + if (charHeight === 0 || charWidth === 0) {
  + return {cols: cols, rows: rows};
  + }
  const computedStyle = window.getComputedStyle(this);
  const width = widthPixels - px(computedStyle.marginLeft) - px(computedStyle.marginRight) - 4;
  const newCols = Math.floor(width / charWidth);
  