Fixed some Expression and Operand memory issues.

__set.cpp

@@ -7,7 +7,6 @@ namespace jet {
    
    __set::__set(coreutils::ZString &in, coreutils::MString &parent, Global &global) : Tag(in, parent, global) {
       output = false;
-      processContainer(container);
       if(!variableDefined("name"))
 	throw coreutils::Exception("set tag must have name defined.");
       if(!variableDefined("expr") && variableDefined("value") && hasContainer)
@@ -24,6 +23,7 @@ namespace jet {
 	      throw coreutils::Exception("Cannot use eval with expr.");
 	    global.variables[variables["name"]] = Expression(variables["expr"]).string;	    
 	 } else if(hasContainer) {
+	    processContainer(container);
 	    if(evaluate) {
 	       global.variables[variables["name"]] = out;	       
 	    } else {