tests/rwblob_EPT_bilevel.sh on HP-UX/PA-RISC

We've tested ImageMagick 6.2.9 on HP-UX 10.20, 11.00, 11.11,
11.23/PA-RISC, and 11.23/IA-64. Works fine on 11.23/IA-64 but .ps
files seem to be generated incorrectly on any version of
HP-UX/PA-RISC. Odd that this is limited to PA-RISC.

I created a wrapper around the `gs' binary to pause at every
invocation so I can inspect the input files being sent to it.

$ cd /opt/build/ImageMagick-6.2.9
$ PATH=/tmp:$PATH gmake TESTS=tests/rwblob_EPT_bilevel.sh check
...
gmake[1]: Entering directory `/opt/build/ImageMagick-6.2.9'
/opt/build/ImageMagick-6.2.9/tests/.libs/rwblob /opt/build/ImageMagick-6.2.9/tests/input_bilevel.miff EPT 
gs -q -dBATCH -dSAFER -dMaxBitmap=500000000 -dNOPAUSE -dAlignToPixels=0 -dEPSCrop -sDEVICE=psdrgb -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -g70x46 -r72x72 -sOutputFile=/var/tmp/magick-e0002013 -f/var/tmp/magick-d0002013 -f/var/tmp/magick-c0002013
Error: /stackunderflow in --eq--
Operand stack:

Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false   1   %stopped_push   1   3   %oparray_pop   1   3   %oparray_pop   1   3   %oparray_pop   1   3   %oparray_pop   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--
Dictionary stack:
   --dict:1139/1686(ro)(G)--   --dict:0/20(G)--   --dict:71/200(L)--
Current allocation mode is local
Current file position is 3
GPL Ghostscript 8.54: Unrecoverable error, exit code 1

$ ls -ld /var/tmp/magick-d0002013 /var/tmp/magick-c0002013  
lrwxrwxr-x   1 china      china           24 Feb  8 12:40 /var/tmp/magick-c0002013 -> /var/tmp/magick-b0002013
-rw-------   1 china      china          114 Feb  8 12:40 /var/tmp/magick-d0002013
$ ls -ld /var/tmp/magick-b0002013 /var/tmp/magick-d0002013
-rw-------   1 china      china         6593 Feb  8 12:40 /var/tmp/magick-b0002013
-rw-------   1 china      china          114 Feb  8 12:40 /var/tmp/magick-d0002013

I've attached a copy of /var/tmp/magick-b0002013 and
/var/tmp/magick-d0002013. The file corruption occurs in
/var/tmp/magick-b0002013.

I've tried building with both the HP-UX C compiler and GCC 3.4.3. Both
exhibit the same result. Any clues on where I can start debugging?

-- 
albert chin ([email protected])

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