On Mon, 16 Feb 2026 at 15:48, luigi scarso <[email protected]> wrote:

>
>
> On Sun, 15 Feb 2026 at 21:34, David Chiang <[email protected]>
> wrote:
>
>> I see that part of my problem was creating glyph nodes with subtype 0 and
>> I should use subtype 1 instead.
>>
>> But to be clear, these are the cases I found surprising:
>>
>> local a = node.new('glyph', 0)
>> node.protect_glyph(a)
>> node.protect_glyph(a)
>> print(a.subtype) -- expected 256, actual 512
>> node.unprotect_glyph(a)
>> node.unprotect_glyph(a)
>> print(a.subtype) -- expected 0, actual 256
>>
>> local b = node.new('disc')
>> local c = node.new('glyph', 'character')
>> b.replace = c
>> node.unprotect_glyph(b)
>> print(c.subtype) -- expected 1, actual 65281
>>
>>
>> The second case (expected 0, actual 256) is explained by what you wrote:
>>
>> we make an exception for 256 which can be used when
>>> no subtype is set which makes it possible to disable unprotection.
>>>
>>
>> But the first case still seems surprising to me, and the third case
>> really looks like a bug to me.
>>
>
> I will check them later.
>
>
Hans rewrote that part, see the commit
https://svn.tug.org:8369/texlive?view=revision&revision=77938

--
luigi

>
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