If not able to find a symbol in the global environment, then also the…

… pure environment, don't error out saying it's impure

match.lua

@@ -10,7 +10,7 @@ function match.test (pattern, arg)
 	elseif pattern == any then
 		return true
 	end
-	
+
 	return false
 end
 

pure.lua

@@ -179,11 +179,7 @@ end
 
 -- Error out on lookups in the pure environment that have been blacklisted
 pure_mt.__index = function (table, key)
-	if table == pure_env then
-		error("'" .. key .. "' does not exist in pure environment", 2)
-	else
-		return nil
-	end
+	error("'" .. key .. "' does not exist in pure environment", 2)
 end
 
 -- When trying to set a new definition globally, validate purity.
@@ -203,4 +199,6 @@ global_mt.__newindex = function (table, key, value)
 end
 
 -- If lookup fails in global environment, check pure environment.
-global_mt.__index = pure_env
+global_mt.__index = function (table, key)
+	return rawget(pure_env, key)
+end