Blender Version
All versions (2.93, master).
Short description of error
It's possible to load fonts with duplicate ID names in the Python API.
import bpy
filepath = "/path/to/font.ttf"
for i in range(10):
bpy.data.fonts.load(filepath, check_existing=False)
keys = list(bpy.data.fonts.keys())
print(keys)
assert(len(keys) == len(set(keys)))Running this script asserts when it shouldn't.