robin@peeves:~/sauce/ghostpdl.git/gs$ valgrind --track-origins=yes --db-attach=yes membin/gs -o out.ppm -sDEVICE=ppmraw examples/tiger.eps
==14548== Memcheck, a memory error detector
==14548== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==14548== Using Valgrind-3.5.0-Debian and LibVEX; rerun with -h for copyright info
==14548== Command: membin/gs -o out.ppm -sDEVICE=ppmraw examples/tiger.eps
==14548==
GPL Ghostscript GIT PRERELEASE 9.05 (2011-03-30)
Copyright (C) 2010 Artifex Software, Inc.  All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.
==14548== Conditional jump or move depends on uninitialised value(s)
==14548==    at 0x5422D8: ref_param_write_string_value (iparam.c:307)
==14548==    by 0x542053: ref_param_write_typed (iparam.c:230)
==14548==    by 0x99B165: param_write_string (gsparam.c:390)
==14548==    by 0x9792D1: gx_default_get_params (gsdparam.c:206)
==14548==    by 0x756ED9: gdev_prn_get_params (gdevprn.c:498)
==14548==    by 0x7F670B: gdev_prn_get_params_planar (gdevppla.c:59)
==14548==    by 0x7F3EF8: ppm_get_params (gdevpbm.c:440)
==14548==    by 0x978820: gs_get_device_or_hw_params (gsdparam.c:65)
==14548==    by 0x585C5C: zget_device_params (zdevice.c:243)
==14548==    by 0x585D42: zgetdeviceparams (zdevice.c:262)
==14548==    by 0x53D46C: do_call_operator (interp.c:84)
==14548==    by 0x54085F: interp (interp.c:1539)
==14548==  Uninitialised value was created by a stack allocation
==14548==    at 0x978849: gx_default_get_params (gsdparam.c:74)
==14548==
==14548==
==14548== ---- Attach to debugger ? --- [Return/N/n/Y/y/C/c] ---- y

...

0x00000000005422d8 in ref_param_write_string_value (pref=0x7feffdce0,
    pvalue=0x7feffdd40, imem=0xa3483d8) at ./psi/iparam.c:307
307         if (pvalue->persistent)