Is there an existing issue for this?

• I have searched the existing issues

Is the issue reproducible in Notepad++ without plugin?

• I have tried Notepad++ without plugin

Is the issue reproducible in portable version of Notepad++?

• I have tried portable version of Notepad++

Does the issue affect SciTE?

• I have tried SciTE

Description of the Issue

When the program processes the WM_DESTROY message, it calls the function killAllChildren to release all created ScintillaEditView windows. However, this function does not release the class member variable ScintillaEditView _fileEditView;. No call to _fileEditView.destroy(); can be found in other functions either.

Steps To Reproduce

none.

Current Behavior

As a result, _fileEditView is not released when the program exits.

Expected Behavior

The call to _fileEditView.destroy(); should be added to the killAllChildren function.

Debug Information

Notepad++ v8.9.1   (64-bit)
Build time: Jan 18 2026 - 22:45:31
Scintilla/Lexilla included: 5.5.8/5.4.6
Boost Regex included: 1_90
pugixml included: 1.15
nlohmann JSON included: 3.12.0
Path: C:\Program Files\Notepad++\notepad++.exe
Command Line: 
Admin mode: OFF
Local Conf mode: OFF
Cloud Config: OFF
Periodic Backup: ON
Placeholders: OFF
Scintilla Rendering Mode: SC_TECHNOLOGY_DIRECTWRITE (1)
Multi-instance Mode: monoInst
asNotepad: OFF
File Status Auto-Detection: cdEnabledNew (for current file/tab only) + cdAutoUpdate
Dark Mode: ON
Display Info:
    primary monitor: 1920x1200, scaling 100%
    visible monitors count: 1
    installed Display Class adapters: 
        0000: Description - AMD Radeon(TM) Graphics
        0000: DriverVersion - 32.0.11016.3
OS Name: Windows 11 Pro for Workstations (64-bit)
OS Version: 25H2
OS Build: 26200.7840
Current ANSI codepage: 1252
Plugins:

Anything else?

No response