Looking at the code:
-- snip --
void
PsPolyGlyphBlt(
  DrawablePtr   pDrawable,
  GCPtr         pGC,
  int           x,
  int           y,
  unsigned int  nGlyphs,
  CharInfoPtr  *pCharInfo,
  pointer       pGlyphBase)
{
    int width, height;
    PixmapPtr pPixmap;
    int nbyLine;                        /* bytes per line of padded pixmap */
    FontPtr pfont;
    GCPtr pGCtmp;
    register int i;
    register int j;
    unsigned char *pbits;               /* buffer for PutImage */
    register unsigned char *pb;         /* temp pointer into buffer */
    register CharInfoPtr pci;           /* currect char info */
    register unsigned char *pglyph;     /* pointer bits in glyph */
    int gWidth, gHeight;                /* width and height of glyph */
    register int nbyGlyphWidth;         /* bytes per scanline of glyph */
    int nbyPadGlyph;                    /* server padded line of glyph */
    int w, tmpx;
    XID gcvals[3];

    pfont = pGC->font;
    width = FONTMAXBOUNDS(pfont,rightSideBearing) -
            FONTMINBOUNDS(pfont,leftSideBearing);
    height = FONTMAXBOUNDS(pfont,ascent) +
             FONTMAXBOUNDS(pfont,descent);

    if ((width == 0) || (height == 0) )
        return;
    {
        int i;
        w = 0;
        for (i=0; i < nGlyphs; i++) w += pCharInfo[i]->metrics.characterWidth;
    }
    pGCtmp = GetScratchGC(1, pDrawable->pScreen);
    if (!pGCtmp)
    {
        (*pDrawable->pScreen->DestroyPixmap)(pPixmap);
        return;
    }
[snip]
-- snip --

It seems that the whole statement
|(*pDrawable->pScreen->DestroyPixmap)(pPixmap);| can be removed (same applies to
the |PsDestroyPixmap(pPixmap);| statement later in the code) ...

Jay:
Just curious: For what purpose was the |pPixmap| being used ?

Closing WONTFIX because nobody cares about Xprint. Reopen if you plan to address this bug.