[mythtv] seg fault in mythvideo

[Kirby Vandivort]

Seg fault in mythvideo..  backtrace is attached.  Basically, it
looks like  'it' isn't getting a good value if the list_count is
zero.  I'm not sure if the calling function can handle curitem
being null and that last curitem = can just be deleted or
what.  I'll let someone other than myself handle this.


Basically, I haven't actually done anything with mythvideo before.
Just ripped a dvd using mythdvd and went to mythvideo to look
at it, and hit the 'browse video's button and that is when it
seg faulted.  I can provide any additional information as needed




void VideoBrowser::SetCurrentItem()
{
    ValueMetadata::Iterator it;
                 : 
                 : 
                 : 
                                                                                
    int list_count = m_list.count();
                                                                                
    if(list_count == 0)
    {
        inData = 0;
        allowselect = false;
    }
    else
    {
        if(inData < list_count)
        {
            it = m_list.at(inData);
        }
        else
        {
            inData = 0;
            it = m_list.begin();
        }
                                                                                
        curitem = new Metadata(*(it));
    }
    curitem = new Metadata(*(it));
}





-- 

Kirby Vandivort                      Theoretical and 
Senior Research Programmer            Computational Biophysics 
Email: kvandivo at ks.uiuc.edu          3051 Beckman Institute
http://www.ks.uiuc.edu/~kvandivo/    University of Illinois
Phone: (217) 244-5711                405 N. Mathews Ave
Fax  : (217) 244-6078                Urbana, IL  61801, USA
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This GDB was configured as "i686-pc-linux-gnu"...
(no debugging symbols found)...
(gdb) run
Starting program: /usr/bin/mythfrontend 
(no debugging symbols found)...(no debugging symbols found)...
(no debugging symbols found)...(no debugging symbols found)...
(no debugging symbols found)...(no debugging symbols found)...
(no debugging symbols found)...[New Thread 16384 (LWP 4913)]
2003-09-23 20:45:03 Enabled verbose msgs : important general

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16384 (LWP 4913)]
0x408317b0 in QString::operator=(QString const&) ()
   from /usr/qt/3/lib/libqt-mt.so.3
(gdb) thread apply all bt full

Thread 1 (Thread 16384 (LWP 4913)):
#0  0x408317b0 in QString::operator=(QString const&) ()
   from /usr/qt/3/lib/libqt-mt.so.3
No symbol table info available.
#1  0x41ab02ec in Metadata (this=0x8559970, other=@0x8) at metadata.h:38
No locals.
#2  0x41ab415b in VideoBrowser::SetCurrentItem() (this=0x8543b78)
    at videobrowser.cpp:374
	it = {node = 0x0}
	list_count = 0
#3  0x41ab1a01 in VideoBrowser (this=0x8543b78, ldb=0x8521208, 
    parent=0x8534800, name=0x41acd9dd "video browser") at videobrowser.cpp:49
No locals.
#4  0x41a9972d in VideoCallback(void*, QString&) (data=0xbfffe810, 
    selection=@0x854c080) at main.cpp:231
	browse = (class VideoBrowser *) 0x409b4128
	mdata = (GenericData *) 0xbfffe810
	sel = {static null = {
    static null = <same as static member of an already seen type>, 
    d = 0x8504640, static shared_null = 0x8504640}, d = 0x85464b0, 
  static shared_null = 0x8504640}
#5  0x400be209 in ThemedMenu::handleAction(QString&) ()
   from /usr/lib/libmyth-0.12.so.0
No symbol table info available.
(gdb) up
#1  0x41ab02ec in Metadata (this=0x8559970, other=@0x8) at metadata.h:38
38	        filename = other.filename;
Current language:  auto; currently c++
(gdb) up
#2  0x41ab415b in VideoBrowser::SetCurrentItem() (this=0x8543b78)
    at videobrowser.cpp:374
374	    curitem = new Metadata(*(it));
(gdb) print it
$1 = {node = 0x0}
(gdb) print list_count
$2 = 0
(gdb) print allowselect
$3 = false
(gdb) quit
Script done on Tue Sep 23 20:45:48 2003