[poppler] What is wrong with this piece of PostScript code?

[Alex Korobkin]

Hi all,

I have a PostScript file generated from a PDF by pdftops 0.22.3, which
cannot be interpreted neither by printer nor by GhostScript. I figured that
removing this stance of code (marked with >) makes GhostScript happy, but
cannot understand what exactly is wrong with it.

Here is the code:

  0 0 Td
  [1 0 0 -1 139 18] Tm
  0 0 Td
> /F12_0 13.3333 Tf
> (\012\355)
> [13.3333
> 0] Tj
> [1 0 0 1 0 0] Tm
> 0 0 Td
> [1 0 0 -1 139 18] Tm
> 0 0 Td
  /F11_0 13.3333 Tf
  (\000\003)
  [3.704417

F12_0 represents embedded DejaVuSans font.
I assume that Tj is a standard procedure inserted by poppler, but will copy
it here just in case:

/Tj {
  fCol
  0 pdfTextRise pdfTextMat dtransform rmoveto
  currentpoint 4 2 roll
  pdfTextRender 1 and 0 eq {
    2 copy xyshow2
  } if
  pdfTextRender 3 and dup 1 eq exch 2 eq or {
    3 index 3 index moveto
    2 copy
    currentfont /FontType get 3 eq { fCol } { sCol } ifelse
    xycp currentpoint stroke moveto
  } if
  pdfTextRender 4 and 0 ne {
    4 2 roll moveto xycp
    /pdfTextClipPath [ pdfTextClipPath aload pop
      {/moveto cvx}
      {/lineto cvx}
      {/curveto cvx}
      {/closepath cvx}
    pathforall ] def
    currentpoint newpath moveto
  } {
    pop pop pop pop
  } ifelse
  0 pdfTextRise neg pdfTextMat dtransform rmoveto
} def

Here is how GhostScript complains about it:

...
resmp FindResource beg F12_0
resmp FindResource end
Error: /rangecheck in --xyshow--
Operand stack:
   139.0   18.0   (\n\355)   --nostringval--   (\n\355)   --nostringval--
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--
--nostringval--   2   %stopped_push   --nostringval--   --nostringval--
--nostringval--   false   1   %stopped_push   1862   1   3   %oparray_pop
1861   1   3   %oparray_pop   1845   1   3   %oparray_pop   1739   1   3
%oparray_pop   --nostringval--   %errorexec_pop   .runexec2
--nostringval--   --nostringval--   --nostringval--   2   %stopped_push
--nostringval--   --nostringval--
Dictionary stack:
   --dict:1158/1684(ro)(G)--   --dict:1/20(G)--   --dict:85/200(L)--
--dict:74/75(L)--   --dict:19/25(L)--   --dict:0/15(L)--   --dict:0/15(L)--
  --dict:10/15(L)--
Current allocation mode is local
Last OS error: Resource temporarily unavailable
Current file position is 345679
GPL Ghostscript 9.06: Unrecoverable error, exit code 1

I assume the problem is with how the original PDF embeds the font, but
cannot really understand why Tj would fail on those parameters.

Could someone please have a look and give me a hint on why is this
happening?
Thanks in advance.

Unfortunately, the original doc cannot be provided because it's full of
confidential information.
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