Lexer error for "a=1.0"

For a valid lua code:
a=1.0
I get lexer error:
warning: metalua failed to compile code that compiles with loadstring.  error in metalua?
lua-inspect/metalualib/gg.lua:56: lua-inspect/metalualib/lexer.lua:129: assertion failed!   6

I made a workaround, but not sure what is the real fix:
metalualib/lexer.lua:129 if tag=='Number' and not content then content=0 end
