any chance to get a stacktrace with debug symbols?

I don't have a NetBSD to try this.

reopen this bug when you have the requested information

In release 2.0.0, the tests fail the same way:
...
Running ../../samples/source/dumpmainxmp ./../../samples/BlueSquares/BlueSquare.
jpg

[1]   Segmentation fault (core dumped) ${DUMPMAINXMP_PR...
Failed
FAIL: testcore.sh
...
Running 3 test cases...
unknown location(0): fatal error in "test_xmpfiles": memory access violation
test2.cpp(132): last checkpoint

*** 1 failure detected in test suite "Master Test Suite"
LeakTracker: leaked = 0, errors = 0
FAIL: test2


Backtrace with symbols for dumpmainxmp is:
Program terminated with signal 11, Segmentation fault.
#0  0x000000000048bdb6 in MD5Update (context=0x7f7fffffb880,
    input=0xfd2330c6 <Address 0xfd2330c6 out of bounds>, inputLen=8)
    at MD5.cpp:163
163              std::memcpy (&context->buffer[index], &input[i], inputLen-i);
(gdb) bt
#0  0x000000000048bdb6 in MD5Update (context=0x7f7fffffb880,
    input=0xfd2330c6 <Address 0xfd2330c6 out of bounds>, inputLen=8)
    at MD5.cpp:163
#1  0x0000000000485123 in ComputeTIFFDigest (tiff=@0x7f7ffd2300c0,
    digestStr=0x7f7fffffb9c0) at ReconcileTIFF.cpp:221
#2  0x00000000004852c0 in ReconcileUtils::CheckTIFFDigest (
    tiff=@0x7f7ffd2300c0, xmp=@0x7f7ffd227140) at ReconcileTIFF.cpp:305
#3  0x0000000000472497 in ImportJTPtoXMP (srcFormat=1246774599,
    lastLegacy=2 '\002', tiff=0x7f7ffd2300c0, psir=@0x7f7ffd208430,
    iptc=0x7f7ffd208480, xmp=0x7f7ffd227140, options=7)
    at ReconcileLegacy.cpp:67
#4  0x0000000000453706 in JPEG_MetaHandler::ProcessXMP (this=0x7f7ffd227100)
    at JPEG_Handler.cpp:692
#5  0x00000000004450f4 in XMPFiles::GetXMP (this=0x7f7ffd208390,
    xmpObj=0x7f7fffffbc00, xmpPacket=0x7f7fffffbcb8,
    xmpPacketLen=0x7f7fffffbcb4, packetInfo=0x7f7fffffc100) at XMPFiles.cpp:832
#6  0x000000000044371d in WXMPFiles_GetXMP_1 (xmpFilesRef=0x7f7ffd208390,
    xmpRef=0x7f7ffd20e080, xmpPacket=0x7f7fffffbcb8,
    xmpPacketLen=0x7f7fffffbcb4, packetInfo=0x7f7fffffc100,
    wResult=0x7f7fffffbc80) at WXMPFiles.cpp:247
#7  0x0000000000408274 in TXMPFiles<std::string>::GetXMP (this=0x7f7fffffc130,
    xmpObj=0x7f7fffffc140, xmpPacket=0x0, packetInfo=0x7f7fffffc100)
    at ../../public/include/client-glue/TXMPFiles.incl_cpp:278
#8  0x0000000000406c7f in ProcessFile (
    fileName=0x7f7fffffeb19 "./../../samples/BlueSquares/BlueSquare.jpg")
    at DumpMainXMP.cpp:85
#9  0x0000000000406e44 in main (argc=2, argv=0x7f7fffffc630)
    at DumpMainXMP.cpp:119

Backtrace with symbols for test2 is:
(gdb) bt
#0  0x00007f7ffd33269a in kill () from /usr/lib/libc.so.12
#1  0x00007f7ffd3d7a99 in abort () from /usr/lib/libc.so.12
#2  0x00007f7ffd3a0f90 in __assert13 () from /usr/lib/libc.so.12
#3  0x000000000040e87e in prepare_test (argc=1, argv=0x7f7fffffd478,
    filename=0x4aeb70 "../../samples/BlueSquares/BlueSquare.jpg")
    at utils.cpp:52
#4  0x0000000000408a61 in init_unit_test_suite (argc=1, argv=0x7f7fffffd478)
    at test2.cpp:193
#5  0x00000000004a60db in boost::unit_test::framework::init ()
#6  0x000000000049bd06 in boost::unit_test::unit_test_main ()
#7  0x000000000040882f in ___start ()
#8  0x00007f7ffdffa000 in ?? ()
#9  0x0000000000000001 in ?? ()
#10 0x00007f7ffffff6f8 in ?? ()
#11 0x0000000000000000 in ?? ()

I just built 2.0.x (the current branch) on NetBSD 4.0/i386 and I didn't run into any problem.

Which platform to you run it on?

oops I didn't see: pre-release 4.99 and x86_64

I guess that will be harder to find.

WONTFIX unless you can reproduce on a stable version.