Hello, the following PlainTeX example demonstrates some differences between LuaTeX and plain Lua concerning the "error"-function: -------------------------------------------------------------------- %&luatex \directlua0{error()} % A % \directlua0{error('')} % B \end (A) results in: This is LuaTeX, Version snapshot-0.25.2-2008041019 (Web2C 7.5.6) (Error.tex ! LuaTeX error ^^@?V[^^@^^@. l.4 \directlua0{error()} % A ? (B) results in: This is LuaTeX, Version snapshot-0.25.2-2008041019 (Web2C 7.5.6) (Error.tex ! LuaTeX error [string "luas[0]"]:1: . l.5 \directlua0{error('')} % B ? Compare with Lua ("error('')" only): jonathansauer$ lua Lua 5.1.2 Copyright (C) 1994-2007 Lua.org, PUC-Rio
error('') stdin:1: stack traceback: [C]: in function 'error' stdin:1: in main chunk [C]: ?
-------------------------------------------------------------------- So there are two issues here: 1. When called in LuaTeX and with no parameters, <error> creates quite a creative error message. 2. When called in LuaTeX and with an error message, <error> does not display a stack traceback (contrary to the Lua interpreter). The first one seems to be some kind of invalid pointer error (the error message is read from somewhere in memory instead of being omitted). The missing stacktrace is strange though. Jonathan