Crash when accessing wx.stc.StyledTextCtrl.DropTarget.Data

[komoto48g]

trafficstars

Operating system: Windows 10 wxPython version & source: 4.1.1 (pypi) Python version & source: 3.8.6

Description of the problem: This bug is the direct cause of the previously opened issue #1959 Accessing the Data of wx.stc.StyledTextCtrl.DropTarget property will crash, but other properties are no problem. I will raise this as a new issue and close #1959.

Code Example (click to expand)

import wx
import wx.stc

app = wx.App()
frm = wx.Frame(None)
text = wx.stc.StyledTextCtrl(frm)
print("text.DropTarget =", text.DropTarget)
print("text.DropTarget.Data =", text.DropTarget.Data) # crash here
print("done")

[swt2c]

Hmm. Possibly Windows-specific? I don't see on Linux. Does this happen on 4.0.7 for you also?

[komoto48g]

Thank you for checking this issue. This occurs also for wx 4.0.7 on Windows 10. Seems like a Windows-specific DnD (shell extension) problem...

[swt2c]

Can you get a stacktrace for the crash?

[komoto48g]

No, unfortunately. The error occurs inside the built-in method DropTarget.GetData or Data. EDIT When launched using switch python -Xdev -Xtracemalloc, it shows the message as follows:

Windows fatal exception: access violation

[RobinD42]

This issue has been mentioned on Discuss wxPython. There might be relevant details there:

https://discuss.wxpython.org/t/disabling-drag-and-drop-in-a-richtextctrl/35795/2