File dialog crashes sometimes

[humdinger]

This is hrev54834.

I've seen this only with Web+ (rebased 90d5fec996134cc8bda5e73ce770ec0a13d2197b, dec. 6th 2020), because I've been uploading icons/screenshots to HDS a lot. Maybe other apps are effected as well, I dunno...

So, when uploading at HaikuDepotServer I sometimes get the follwing segment violation (full report attached). It seems to crash after I click the OK button and right after the dialog window has closed:

thread 3041: w>Web+Rebased: Open 
state: Exception (Segment violation)

Frame		IP			Function Name
-----------------------------------------------
00000000	00000000	? 
	Unable to retrieve disassembly for IP 0: address not contained in any valid image.
0x7fcd1087e770	0x64fc6760fc	BPrivate::BTextWidget::~BTextWidget() + 0xc 
0x7fcd1087e7b0	0x64fc6443dd	BPrivate::BPose::~BPose() + 0x5d 
0x7fcd1087e7d0	0x64fc64446c	BPrivate::BPose::~BPose() + 0xc 
0x7fcd1087e800	0x64fc647656	BObjectList<BPrivate::BPose>::~BObjectList() + 0x66 
0x7fcd1087e820	0x64fc6476da	BPrivate::PoseList::~PoseList() + 0x1a 
0x7fcd1087e840	0x64fc652107	BPrivate::BPoseView::~BPoseView() + 0x27 
0x7fcd1087e860	0x64fc60707a	BPrivate::BFilePanelPoseView::~BFilePanelPoseView() + 0x1a 
0x7fcd1087e880	0x176c1cd7787	BView::~BView() + 0x47 
0x7fcd1087e8a0	0x64fc60062a	BPrivate::BorderedView::~BorderedView() + 0x1a 
0x7fcd1087e8c0	0x176c1cd7787	BView::~BView() + 0x47 
0x7fcd1087e8e0	0x176c1c6083c	BGridView::~BGridView() + 0xc 
0x7fcd1087e900	0x176c1cd7787	BView::~BView() + 0x47 
0x7fcd1087e920	0x176c1cd786c	BView::~BView() + 0xc 
0x7fcd1087e940	0x176c1cd7787	BView::~BView() + 0x47 
0x7fcd1087e960	0x176c1cd786c	BView::~BView() + 0xc 
0x7fcd1087e9c0	0x176c1cdf381	BWindow::~BWindow() + 0xc1 
0x7fcd1087ea30	0x64fc6173f4	BPrivate::TFilePanel::~TFilePanel() + 0x94 
0x7fcd1087ea50	0x64fc61741c	BPrivate::TFilePanel::~TFilePanel() + 0xc 
0x7fcd1087ea70	0x176c1c2090c	BLooper::_task0_(void*) + 0x2c 
0x7fcd1087ea90	0x246df0d2e7	thread_entry + 0x17 
00000000	0x7f79e4f2a260	commpage_thread_exit + 0 

Not sure if it's a Web+ issue or interface kit in general.

[humdinger]

debug report of Web+ (rebased)