Node memory leak

[gucci-on-fleek]

Lua-widow-control is leaking node memory somewhere. In the 1400 page Gutenberg test document, luatex.exe uses >500 MiB at the end of a compile.

This only seems to crash the interpreter once we get past 2000 pages or so, so it's not a huge deal, but it should probably be fixed at some point.

[gucci-on-fleek]

See

• https://tug.org/pipermail/luatex/2010-June/001687.html (continued at https://tug.org/pipermail/luatex/2010-July/001692.html)
• https://www.pragma-ade.nl/general/manuals/about.pdf#page=83