Fixed a string indexing issue.

compatibility/compatibility.nom

@@ -24,7 +24,7 @@ externally (upgrade action %stub to %version via %upgrade_fn) means:
     for %action in %actions:
         %replacements = {}
         for %i in 1 to (size of %action):
-            if (%action.%i.type is "Var"):
+            if (%action.%i is "Var" syntax tree):
                 %replacements.(%action.%i.1) = "\(\%tree as lua id)[\%i]"
         define mangler
         (make tree %t) means:

containers.lua

@@ -501,9 +501,6 @@ do
   setmetatable(text_methods, {
     __index = string2
   })
-  setmetatable(string2, {
-    __index = error
-  })
   getmetatable("").__methods = text_methods
   getmetatable("").__index = text_methods
   getmetatable("").__add = function(self, x)

containers.moon

@@ -200,7 +200,6 @@ do
         character: (i)=> sub(@, i, i)
     
     setmetatable(text_methods, {__index:string2})
-    setmetatable(string2, {__index:error})
     getmetatable("").__methods = text_methods
     getmetatable("").__index = text_methods
     getmetatable("").__add = (x)=> tostring(@)..tostring(x)