Comment not parsed when value is boolean

tomlkit.loads の再現から始め、d["foo"] 配下の値がどのように作成されるかを追跡し、boolean のパスを integer および string のパスと比較します。boolean 値が trivia.comment を通じて末尾のコメントを公開し、既存の動作および提供された再現と一致すれば完了です。

I've just tried to set up comment parsing in a TOML config file to see if I could use it for documentation, and it seems like it'll work except for when the configured value is a boolean.

When I drop into a debugger and look at the attributes of the parsed value:

(Pdb) p default_toml[section]
{'CONVERT_TO_PDF': False}
(Pdb) x = default_toml[section]
(Pdb) y = x["CONVERT_TO_PDF"]

and then tab complete to show the attributes, the dict x has a trivia attribute but the value y does not:

(Pdb) p y.
y.__abs__            y.__floor__          y.__invert__         y.__radd__           y.__rpow__           y.__trunc__
y.__add__            y.__floordiv__       y.__le__             y.__rand__           y.__rrshift__        y.__xor__
y.__and__            y.__format__         y.__lshift__         y.__rdivmod__        y.__rshift__         y.as_integer_ratio
y.__bool__           y.__ge__             y.__lt__             y.__reduce__         y.__rsub__           y.bit_length
y.__ceil__           y.__getattribute__   y.__mod__            y.__reduce_ex__      y.__rtruediv__       y.conjugate
y.__class__          y.__getnewargs__     y.__mul__            y.__repr__           y.__rxor__           y.denominator
y.__delattr__        y.__gt__             y.__ne__             y.__rfloordiv__      y.__setattr__        y.from_bytes
y.__dir__            y.__hash__           y.__neg__            y.__rlshift__        y.__sizeof__         y.imag
y.__divmod__         y.__index__          y.__new__            y.__rmod__           y.__str__            y.numerator
y.__doc__            y.__init__           y.__or__             y.__rmul__           y.__sub__            y.real
y.__eq__             y.__init_subclass__  y.__pos__            y.__ror__            y.__subclasshook__   y.to_bytes
y.__float__          y.__int__            y.__pow__            y.__round__          y.__truediv__

• I checked in x.trivia.comment but there's nothing there
• For other types of value (integer, float and string) comments are expected to be in the trivia.comment attribute

Is this a bug, or should I be looking for the comment in another place?

To minimally reproduce:

import tomlkit
d = tomlkit.loads("""
[foo]
bar = 1 # hello
baz = false # goodbye
""")
v1 = d["foo"]["bar"]
v2 = d["foo"]["baz"]
print(hasattr(v1, "trivia"))
print(getattr(v1.trivia, "comment"))
print(hasattr(v2, "trivia"))

⇣

True
# hello
False