Cannot access glyphs (GlyphInfo) in Pango

The glyphs property of GlyphString in Pango triggers "Stack overflow protection. Can't copy array element into GIArgument." message and always returns an empty list.

Minimal example:

import gi
gi.require_version("Pango", "1.0")
gi.require_version("PangoFT2", "1.0")
from gi.repository import Pango, PangoFT2

text = 'Some text'

ctx = Pango.Context()
font_map = PangoFT2.FontMap()
ctx.set_font_map(font_map)

layout = Pango.Layout(ctx)
layout.set_text(text)

lines = layout.get_lines()

# Trying to access GlyphString.glyphs property
glyph_string = lines[0].runs[0].glyphs
print(glyph_string.glyphs)  # <-- returns empty list, triggers "Stack overflow protection" message