Overbar in symbol's value field crashes kicad

Description

This may or may not be related to issue #15506 (closed). At least it is caused by similar actions, but this time affects only v7.99.

Following the steps below kicad answers reliable with a crash. requirements: use of overbar in value-string and setting these value-string to custom font

If the global setting Preferences-->Schematic Editor-->Display Options-->Appearance-->Default Font--> is already set to custom font (Arial), then kicad already crashes on the first doubleclick onto the value-string (crash at step3 below).

Steps to reproduce

1. open attached project, open schematic:value_string_overbar_crash.zip
2. locate Resistor R1: note the value-string contains the overbar-syntax ~{}
3. doubleclick Value-String (to get "Edit Values Field" dialog
4. change font to "Arial" (should be available on all sttandard windows installations)
5. click OK, "Edit Values Field" dialog closes
6. doubleclick again this Value-String: crash

KiCad Version

Application: KiCad Schematic Editor x64 on x64

Version: 7.99.0-2406-g331176744c, release build

Libraries:
	wxWidgets 3.2.2
	FreeType 2.12.1
	HarfBuzz 8.0.0
	FontConfig 2.14.2

Platform: Windows 10 (build 19045), 64-bit edition, 64 bit, Little endian, wxMSW

	wxWidgets: 3.2.2 (wchar_t,wx containers)
	Boost: 1.82.0
	OCC: 7.7.1
	Curl: 8.2.1-DEV
	ngspice: 40
	Compiler: Visual C++ 1936 without C++ ABI

Build settings: