Error while looking through users files

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It's me again... With another exciting error debug report!

SoulseekQt.exe caused an Access Violation at location 00416be1 in module SoulseekQt.exe Reading from location 00000000.

Registers:
eax=0725238c ebx=0028c9f8 ecx=00000000 edx=0028c9f8 esi=00000000 edi=113f89a8
eip=00416be1 esp=0028c9c0 ebp=0028ca18 iopl=0 nv up ei pl nz na po nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00210206

Call stack:
00416BE1 SoulseekQt.exe:00416BE1 Item::HasItem Data.cpp:1452
struct Item * Item::HasItem(
struct Item * this = },
struct less _M_key_compare = {
struct binary_function binary_function = {

}
},
struct _Rb_tree_node_base _M_header = {
_Rb_tree_color _M_color = ,
struct _Rb_tree_node_base * _M_parent = ,
struct _Rb_tree_node_base * _M_left = ,
struct _Rb_tree_node_base * _M_right =
},
size_t _M_node_count =
}
}
}
},
int8 * ip_typeName = "user_share_folder"
)
00432E03 SoulseekQt.exe:00432E03 ShareForm::OnCurrentItemChanged ShareForm.cpp:139
void ShareForm::OnCurrentItemChanged(
struct ShareForm * this = },
struct QTreeWidgetItem * ip_current = &(indirect),
struct QTreeWidgetItem * ip_previous = &(indirect)
)
004ED9C5 SoulseekQt.exe:004ED9C5 ShareForm::qt_metacall moc_ShareForm.cpp:79
int32 ShareForm::qt_metacall(
struct ShareForm * this = },
struct ShareForm * ui = 0x0ec0f918,
struct Item * mp_shareItem = 0x0b0bf410,
int32 m_maxLevel = 6,
int32 m_expandLevel = 0
},
Call _c = InvokeMetaMethod,
int32 _id = 27,
void * * _a = &0x00000000
)
6A2C73F9 QtCore4.dll:6A2C73F9 _ZN11QMetaObject8activateEP7QObjectPKS_iPPv
655FAC76 QtGui4.dll:655FAC76 _ZN11QTreeWidget18currentItemChangedEP15QTreeWidgetItemS1_
656039D3 QtGui4.dll:656039D3 _ZN11QTreeWidget11qt_metacallEN11QMetaObject4CallEiPPv
6A2C73F9 QtCore4.dll:6A2C73F9 _ZN11QMetaObject8activateEP7QObjectPKS_iPPv
655DE4CE QtGui4.dll:655DE4CE _ZN19QItemSelectionModel14currentChangedERK11QModelIndexS2_
655DE61A QtGui4.dll:655DE61A _ZN19QItemSelectionModel15setCurrentIndexERK11QModelIndex6QFlagsINS_13SelectionFlagEE
65594A0D QtGui4.dll:65594A0D _ZN17QAbstractItemView15mousePressEventEP11QMouseEvent
65159F75 QtGui4.dll:65159F75 _ZN7QWidget5eventEP6QEvent
654909DD QtGui4.dll:654909DD _ZN6QFrame5eventEP6QEvent
6559D03B QtGui4.dll:6559D03B _ZN17QAbstractItemView13viewportEventEP6QEvent
655D1710 QtGui4.dll:655D1710 _ZN9QTreeView13viewportEventEP6QEvent
6A2B38BB QtCore4.dll:6A2B38BB _ZN23QCoreApplicationPrivate29sendThroughObjectEventFiltersEP7QObjectP6QEvent
6510FA1B QtGui4.dll:6510FA1B _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent
65118CB1 QtGui4.dll:65118CB1 _ZN12QApplication6notifyEP7QObjectP6QEvent
6A2B419C QtCore4.dll:6A2B419C _ZN16QCoreApplication14notifyInternalEP7QObjectP6QEvent
651135BB QtGui4.dll:651135BB _ZN19QApplicationPrivate14sendMouseEventEP7QWidgetP11QMouseEventS1_S1_PS1_R8QPointerIS0_Eb
651771AB QtGui4.dll:651771AB _ZN19QApplicationPrivate19translateTouchEventERK6tagMSG
6517A7F7 QtGui4.dll:6517A7F7 _ZN19QApplicationPrivate27initializeWidgetPaletteHashEv
75C262FA USER32.dll:75C262FA gapfnScSendMessage
75C26D3A USER32.dll:75C26D3A GetThreadDesktop
75C277C4 USER32.dll:75C277C4 CharPrevW
75C2788A USER32.dll:75C2788A DispatchMessageW
6A2D9801 QtCore4.dll:6A2D9801 _ZN21QEventDispatcherWin3213processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
65174B00 QtGui4.dll:65174B00 _ZN19QApplicationPrivate14enterModal_sysEP7QWidget
6A2B3072 QtCore4.dll:6A2B3072 _ZN10QEventLoop13processEventsE6QFlagsINS_17ProcessEventsFlagEE
6A2B3403 QtCore4.dll:6A2B3403 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE
6A2B71AB QtCore4.dll:6A2B71AB _ZN16QCoreApplication4execEv
004014E5 SoulseekQt.exe:004014E5 qMain main.cpp:27
int32 qMain(
int32 argc = 1,
__builtin_va_list * argv = &0x014a6ff9
)
004EF9D5 SoulseekQt.exe:004EF9D5 qrc_Resource.cpp:11658
004EF698 SoulseekQt.exe:004EF698 qrc_Resource.cpp:11658
0040124B SoulseekQt.exe:0040124B
004012B8 SoulseekQt.exe:004012B8
75D8339A kernel32.dll:75D8339A BaseThreadInitThunk
77DB9ED2 ntdll.dll:77DB9ED2 RtlInitializeExceptionChain
77DB9EA5 ntdll.dll:77DB9EA5 RtlInitializeExceptionChain

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