"loop body may accept empty string" while running sitegen

[tiye]

After sitegen worked, I got error generating the site leafo/sitegen#1

➤➤ l
Makefile          highlight.coffee  pack_html.js      site.moon         www/
client.coffee     index.md          readme.md         style.scss
compiler/         moonscript/       ref.scss          templates/
➤➤ make
sitegen
moon:...r/local/Cellar/luarocks/2.0.13/share/lua/5.1//re.lua:183: loop body may accept empty string
stack traceback:
    [C]: in function 'f'
    ...r/local/Cellar/luarocks/2.0.13/share/lua/5.1//re.lua:183: in function <...r/local/Cellar/luarocks/2.0.13/share/lua/5.1//re.lua:183>
    [C]: in function 'match'
    ...r/local/Cellar/luarocks/2.0.13/share/lua/5.1//re.lua:208: in function <...r/local/Cellar/luarocks/2.0.13/share/lua/5.1//re.lua:206>
    (tail call): ?
    /usr/local/share/lua/5.1/cosmo/grammar.lua:166: in main chunk
    [C]: in function 'require'
    /usr/local/share/lua/5.1/cosmo.lua:3: in main chunk
    [C]: in function 'require'
    /usr/local/bin/sitegen:5: in main chunk

  Suffix = m.Cf(m.V"Primary" * S *
          ( ( m.P"+" * m.Cc(1, mt.__pow)
            + m.P"*" * m.Cc(0, mt.__pow)
            + m.P"?" * m.Cc(-1, mt.__pow)
            + "^" * ( m.Cg(num * m.Cc(mult))
                    + m.Cg(m.C(m.S"+-" * m.R"09"^1) * m.Cc(mt.__pow))
                    )
            + "->" * S * ( m.Cg((String + num) * m.Cc(mt.__div))
                         + m.P"{}" * m.Cc(nil, m.Ct)
                         + m.Cg(Def / getdef * m.Cc(mt.__div))
                         )
            + "=>" * S * m.Cg(Def / getdef * m.Cc(m.Cmt))
            ) * S
          )^0, function (a,b,f) return f(a,b) end ); ---- this line is 183

[leafo]

what version of cosmo and lpeg do you have? luarocks list cosmo luarocks list lpeg

[tiye]

➤➤ luarocks list cosmo

Installed rocks:
----------------

cosmo
   13.01.30-1 (installed) - /usr/local//lib/luarocks/rocks

➤➤ luarocks list lpeg

Installed rocks:
----------------

lpeg
   0.12-1 (installed) - /usr/local//lib/luarocks/rocks
➤➤ lua -v
Lua 5.1.5  Copyright (C) 1994-2012 Lua.org, PUC-Rio
➤➤ luarocks --version
/usr/local/bin/luarocks 2.1.1
LuaRocks main command-line interface

[leafo]

Looks like cosmo/lpeg are messed up but it's been fixed: mascarenhas/cosmo#5

I'm actually running lpeg 0.10. So I guess you could either downgrade or try installing cosmo from source. That's a shame.

[tiye]

With cosmo from source, now working: http://moon-script.org/
So it's a bug of cosmo, closing.