Find missing glyph

Hi ​@KohakuNekotarou , Running from Visual Studio Code I get an error—wrapped in a try statement

try {
    app.findGlyphPreferences.glyphID = -2;
    alert(app.activeDocument.findGlyph()[0].contents);
}catch(e) {
    alert(e)
}  

The error

Yes, I can confirm that this script crashes InDesign.

The document I tried doesn’t have either tables or overset text.