Attach (recommended) or Link to PDF file here:
https://web.archive.org/web/20091223123331/http://sci2s.ugr.es/keel/pdf/specific/articulo/alp99.pdf
(aka `tests/pdfs/issue1936.pdf`)
 
When I copy/paste the multiplication sign on the first line of the first page, I got a `£`.
And when I do the same in evince I got a `×` (the same in chrome).
The font descriptor is:
```
<< /Ascent 0 /CapHeight 749 /CharSet (/multiply) /Descent 0 /Flags 262212 /FontBBox [ -27 -940 1332 825 ] /FontFile3 59 0 R /FontName /KHPEPJ+CMBSY10 /ItalicAngle -14.035 /StemV 0 /Type /FontDescriptor >>
```
So it should be possible to guess the correct character in using the `CharSet` entry:
https://www.adobe.com/content/dam/acom/en/devnet/pdf/pdfs/PDF32000_2008.pdf#page=291


ttContext.functionsDefined[funcId] = { data, i };
          } else if (op === 0x2d) {
            
            if (inFDEF) {
              inFDEF = false;
              lastEndf = i;
            } else {
              pc = callstack.pop();
              if (!pc) {
                warn("TT: ENDF bad stack");
                ttContext.hintsValid = false;
                return;
              }
              funcId = functionsCalled.pop();
              data = pc.data;
              i = pc.i;
              ttContext.functionsStackDeltas[funcId] =
                stack.length - pc.stackTop;
            }
          } else if (op === 0x89) {
            
            if (inFDEF || inELSE) {
              warn("TT: nested IDEFs not allowed");
              tooComplexToFollowFunctions = true;
            }
            inFDEF = true;
            
            lastDeff = i;
          } else if (op === 0x58) {