[luatex] Memory leak in token.put_next() implementation

[Hans Hagen]

On 10/29/2024 6:13 AM, user202729--- via luatex wrote:
> I notice that the `run_put_next` function inserts the token list using
> 
>          begin_token_list(h,0);
> 
> however, this has the problem that in `end_token_list`, the token list is not freed when the type is `0` (i.e. `parameter`).
> 
> I think the `0` should be changed to e.g. `inserted` (4), so that it is correctly freed.

indeed it should be an inserted list (that's what we have in luametatex 
and no mem issue)

> For a test case, consider the following program.
> 
> ```
> lualatex '\directlua{i=1; t=token.get_next()}~\def~#1A{\directlua{i=i+1;if i&1023==0 then print(i) end;for i=1,1000 do token.put_next(t); end}A}~A' </dev/null
> ```
> 
> Before the change, the memory usage grows steadily. After the change, the memory usage remains constant.
> 
> Please take a look. Thank you.
> 


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