fixes #911

compiler/semstmts.nim

@@ -1038,6 +1038,7 @@ proc semProcAux(c: PContext, n: PNode, kind: TSymKind,
       return
   else:
     s = n[namePos].sym
+    s.owner = getCurrOwner()
     typeIsDetermined = s.typ == nil
     s.ast = n
     s.scope = c.currentScope
@@ -1165,6 +1166,11 @@ proc semIterator(c: PContext, n: PNode): PNode =
   let kind = if hasPragma(n[pragmasPos], wClosure) or
                 n[namePos].kind == nkEmpty: skClosureIterator
              else: skIterator
+  # gensym'ed iterator?
+  if n[namePos].kind == nkSym:
+    # gensym'ed iterators might need to become closure iterators:
+    n[namePos].sym.owner = getCurrOwner()
+    n[namePos].sym.kind = kind
   result = semProcAux(c, n, kind, iteratorPragmas)
   var s = result.sons[namePos].sym
   var t = s.typ

tests/macros/tgensym.nim

@@ -28,6 +28,7 @@ macro async2(prc: stmt): stmt {.immediate.} =
   # -> iterator nameIter(): PFutureBase {.closure.} = <proc_body>
   # Changing this line to: newIdentNode($prc[0].ident & "Iter") # will make it work.
   var iteratorNameSym = genSym(nskIterator, $prc[0].ident & "Iter")
+  #var iteratorNameSym = newIdentNode($prc[0].ident & "Iter")
   var procBody = prc[6].convertReturns(retFutureSym)
 
   var closureIterator = newProc(iteratorNameSym, [newIdentNode("PFutureBase")],

todo.txt

@@ -1,7 +1,6 @@
 version 0.9.4
 =============
 
-- fix gensym capture bug
 - fix GC issues
 
 Bugs