"in upvalue 'moonscript_chunk'" not correctly rewritten.

[kazec]

When running from cli tool moon, moonscript catches any error generated and rewrite its traceback's line number and the moonscript_chunk to main chunk.

This can be found in here, where chunk_func defaults to moonscript_chunk.

The pattern used to rewrite this is

"function '" .. chunk_func .. "'"

In moon, moonscript_chunk is referenced in run_chunk therefore becomes an upvalue when called.

So the pattern above won't work anymore.

Perhaps we should change it to something like this ?

rep = "(%d+): in %a+ '?" .. chunk_func .. "'?$"
traceback[#traceback] = traceback[#traceback]\gsub rep, "%1: in main chunk"