Steps to reproduce (this PDF):
[page4.pdf](https://github.com/mozilla/pdf.js/files/5990272/page4.pdf)

````
npm install
node_modules/.bin/gulp dist-install
node examples/node/pdf2svg.js /tmp/page4.pdf
````

Error:
````
Error: Invalid SVG dimensions
    at unreachable (/tmp/pdf.js/build/dist/legacy/build/pdf.js:2086:9)
    at assert (/tmp/pdf.js/build/dist/legacy/build/pdf.js:2091:5)
    at DOMSVGFactory.create (/tmp/pdf.js/build/dist/legacy/build/pdf.js:640:24)
    at SVGGraphics._makeTilingPattern (/tmp/pdf.js/build/dist/legacy/build/pdf.js:24178:36)
    at SVGGraphics._makeColorN_Pattern (/tmp/pdf.js/build/dist/legacy/build/pdf.js:24127:23)
    at SVGGraphics.setFillColorN (/tmp/pdf.js/build/dist/legacy/build/pdf.js:24088:39)
    at SVGGraphics.executeOpTree (/tmp/pdf.js/build/dist/legacy/build/pdf.js:23634:22)
    at /tmp/pdf.js/build/dist/legacy/build/pdf.js:23508:18
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:834:11)
````
current.fontDirection = 1;
      }
      current.fontSize = size;
      current.fontFamily = fontObj.loadedName;
      current.fontWeight = bold;
      current.fontStyle = italic;
      current.tspan = this.svgFactory.createElement("svg:tspan");
      current.tspan.setAttributeNS(null, "y", pf(-current.y));
      current.xcoords = [];
      current.ycoords = [];
    }
    endText() {
      const current = this.current;
      if (
        current.textRenderingMode & TextRenderingMode.ADD_TO_PATH_FLAG &&
        current.txtElement?.hasChildNodes()
      ) {
        
        current.element = current.txtElement;
        this.clip("nonzero");
        this.endPath();
      }
    }
    
    setLineWidth(width) {
      if (width > 0) {
        this.current.lineWidth = width;
      }
    }
    setLineCap(style) {