title: <Error>: FT_Select_Charmap failed: error 6
body: <p>I have a method where I draw a PDF to a bitmap.
  Once in a while I see this error in the log when running it on an actual device (not simulator):</p>
  
  <pre><code>&lt;Error&gt;: FT_Select_Charmap failed: error 6
  </code></pre>
  
  <p>The error is occurring at the marked line (#11):</p>
  
  <pre><code>NSURL *url = [NSURL fileURLWithPath:pdfFilePath];
  CGPDFDocumentRef documentRef = CGPDFDocumentCreateWithURL((CFURLRef)url);
  CGPDFPageRef pageRef = CGPDFDocumentGetPage(documentRef, 1);
  UIGraphicsBeginImageContext(frame.size);
  CGContextRef ctx = UIGraphicsGetCurrentContext();
  CGContextSetRGBFillColor(ctx, 1.0, 1.0, 1.0, 1.0);
  CGContextFillRect(ctx, CGContextGetClipBoundingBox(ctx));
  CGContextTranslateCTM(ctx, 0.0, frame.size.height);
  CGContextScaleCTM(ctx, 1.0, -1.0);
  CGContextConcatCTM(ctx, CGPDFPageGetDrawingTransform(pageRef, kCGPDFCropBox, frame, 0, true));
  CGContextDrawPDFPage(ctx, pageRef); // ERROR HERE
  UIImage *pdfImage = UIGraphicsGetImageFromCurrentImageContext(); // Is this retained???
  UIGraphicsPopContext();
  CGPDFDocumentRelease(documentRef);
  </code></pre>