still recoving from previous block - function change. no more exceptions at least

lib/ast/while_expression.rb

@@ -4,12 +4,13 @@ module Ast
     def compile context
       into = context.function
       while_block = into.new_block "while"
-      ret = while_block.new_block "return"
+      ret = into.new_block "return"
       into.insert_at while_block
+      
       puts "compiling while condition #{condition}"
       cond_val = condition.compile(context)
-      while_block.b ret , condition_code: cond_val.not_operator
-      while_block.branch = ret
+      into.b ret , condition_code: cond_val.not_operator
+      into.insertion_point.branch = ret
 
       last = nil
 
@@ -17,7 +18,9 @@ module Ast
         puts "compiling in while #{part}"
         last = part.compile(context)
       end
-      while_block.b while_block
+      into.b while_block
+      into.insertion_point.branch = while_block
+      
       puts "compile while end"
       into.insert_at ret
       return last