[luatex] Crash: type(r) == unset_node

Javier Bezos listas at tex-tipografia.com
Thu Jun 16 16:44:48 CEST 2016

The following minimal file crashes with TL2016 (win7/64)
and TL2015:


luatexbase.add_to_callback("hpack_filter", function() end, 'desc')

Assertion failed!

Program: C:\...\lualatex.exe
File: ./tex/align.w
Line: 966

Expression: type(r) == unset_node

Unfortunately, using directly callback.register() doesn't work
in LaTeX any more :-(, but it seems the problem is in luatexbase
because using the latter in plain passes.


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