StyledText not accept Multi-bytes characters

[yidabu]

program crashed when StyledText.text encounter multi-bytes characters, e.g. Chinese.

code below causes EXCEPTION_ACCESS_VIOLATION :
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION(0xc0000005) at ntdll.dll (0x7c90316c) thread(1260)
->us
#0 ?? () from ntdll.dll

Code:

import dwt.DWT;
import dwt.custom.StyledText;
import dwt.custom.StyleRange;
import dwt.layout.FillLayout;
import dwt.widgets.Display;
import dwt.widgets.Shell;
import dwt.widgets.Listener;
import dwt.widgets.Event;
import dwt.graphics.Color;
import dwt.graphics.Point;

import dwt.dwthelper.utils;

void main() {
    static String SEARCH_STRING = "box";
    Display display = new Display();
    Color RED = display.getSystemColor(DWT.COLOR_RED);
    Shell shell = new Shell(display);
    shell.setBounds(10,10,250,250);
    StyledText text = new StyledText(shell, DWT.NONE);
    text.setBounds(10,10,200,200);
    text.setText("StyledText not accept Chinese 中国? ");
    shell.open();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch()) display.sleep();
    }
    display.dispose();
}




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