[Bug 240466] graphics/digikam: Segmentation fault on startup

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240466

Adriaan de Groot <adridg at freebsd.org> changed:

           What    |Removed                     |Added
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                 CC|                            |adridg at freebsd.org

--- Comment #5 from Adriaan de Groot <adridg at freebsd.org> ---
Here's a backtrace (after I rebuilt it with debugging symbols):

* thread #1, name = 'digikam', stop reason = signal SIGSEGV: invalid address
(fault address: 0x0)
    frame #0: 0x0000000800f821f1
libdigikamcore.so.6.4.0`::WXMPMeta_RegisterNamespace_1(namespaceURI="http://ns.adobe.com/lightroom/1.0/",
suggestedPrefix="lr", registeredPrefix=0x00007fffffffd6a0,
prefixSize=0x0000000000000001, wResult=0x0000000000000000) at
WXMPMeta.cpp:224:5
   221                                 XMP_StringLen * prefixSize,
   222                                 WXMP_Result *   wResult )
   223  {
-> 224      XMP_ENTER_WRAPPER ( "WXMPMeta_RegisterNamespace_1" )
   225 
   226          if ( (namespaceURI == 0) || (*namespaceURI == 0) ) XMP_Throw (
"Empty namespace URI", kXMPErr_BadSchema );
   227          if ( (suggestedPrefix == 0) || (*suggestedPrefix == 0) )
XMP_Throw ( "Empty suggested prefix", kXMPErr_BadSchema );
(lldb) bt
* thread #1, name = 'digikam', stop reason = signal SIGSEGV: invalid address
(fault address: 0x0)
  * frame #0: 0x0000000800f821f1
libdigikamcore.so.6.4.0`::WXMPMeta_RegisterNamespace_1(namespaceURI="http://ns.adobe.com/lightroom/1.0/",
suggestedPrefix="lr", registeredPrefix=0x00007fffffffd6a0,
prefixSize=0x0000000000000001, wResult=0x0000000000000000) at
WXMPMeta.cpp:224:5
    frame #1: 0x0000000805825b44
libexiv2.so.27`Exiv2::XmpParser::initialize(void (*)(void*, bool), void*) + 132
    frame #2: 0x0000000800d30a0a
libdigikamcore.so.6.4.0`Digikam::MetaEngine::initializeExiv2() at
metaengine.cpp:84:10
    frame #3: 0x0000000000208d22 digikam`main(argc=1, argv=0x00007fffffffe458)
at main.cpp:138:5
    frame #4: 0x000000000020810f digikam`_start(ap=<unavailable>,
cleanup=<unavailable>) at crt1.c:76:7

What's happening is that Exiv2::XmpParser::initialize() is calling
WXMPMeta_RegisterNamespace_1 which is *supposed* to be a function inside Exiv2.
Instead, it ends up in Digikam's reimplementation of that function (instead of
Exiv2's version). And then it goes boom.

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