Bug 691447

When using a monochrome TIFF device, Ghostscript crashes on exit under certain conditions with "GSWIN32C caused an invalid page fault in module GSDLL32.DLL at 019f:1015d0a9".

The easiest way to reproduce this is to call Ghostscript with just the arguments "-dBATCH -sDEVICE=tiffg4", and it will crash immediately.  When I discovered this bug, I noticed that it wasn't happening when I used the "pswrite" or "pdfwrite" devices, so I tested the following devices to see which ones had the problem:

    Device     Crash
    ----------------
    tiffg3     yes
    tiffg4     yes
    tiffpack   yes
    tiffcrle   yes
    tiffg32d   yes
    tifflzw    yes
    tiffgray   no
    tiff12nc   no
    tiff24nc   no
    tiff32nc   no
    tiffsep    no
    pdfwrite   no
    pswrite    no
    pngmono    no

All of the monochrome TIFF devices cause the crash.  None of the grayscale/color TIFF devices do, nor do pswrite or pdfwrite.  I tested pngmono to confirm that the problem wasn't with monochrome output in general.

I've found that it won't always crash, though.  If Ghostscript successfully creates a TIFF output file, then it closes cleanly when it's finished.  For example, the command line "-dBATCH -sDEVICE=tiffg4 -sOutputFile=test.tif test.ps" won't crash, as long as "test.ps" is a valid PS file and that reading it doesn't generate any errors in Ghostscript.

I'm using GPL Ghostscript 8.71 (2010-02-10), and I've reproduced this on Windows 98 and Windows XP machines.  I wasn't able to reproduce the bug on any earlier versions of Ghostscript, including 8.70, 8.64, and 8.61.