bugfix: better implict 'items' support

compiler/importer.nim

@@ -11,7 +11,7 @@
 
 import 
   intsets, strutils, os, ast, astalgo, msgs, options, idents, rodread, lookups,
-  semdata, passes
+  semdata, passes, renderer
 
 proc evalImport*(c: PContext, n: PNode): PNode
 proc evalFrom*(c: PContext, n: PNode): PNode
@@ -29,7 +29,8 @@ proc getModuleName*(n: PNode): string =
   of nkSym:
     result = n.sym.name.s
   else:
-    internalError(n.info, "getModuleName")
+    localError(n.info, errGenerated,
+      "invalide module name: '$1'" % renderTree(n))
     result = ""
 
 proc checkModuleName*(n: PNode): string =

compiler/semexprs.nim

@@ -589,11 +589,10 @@ proc semStaticExpr(c: PContext, n: PNode): PNode =
 
 proc semOverloadedCallAnalyseEffects(c: PContext, n: PNode, nOrig: PNode,
                                      flags: TExprFlags): PNode =
-  if efWantIterator in flags:
-    result = semOverloadedCall(c, n, nOrig, {skIterator})
-  elif efInTypeOf in flags:
+  if {efInTypeOf, efWantIterator} * flags != {}:
+    # consider 'proc p(): seq[int];  for x in p()' here and
     # for ``type(countup(1,3))``, see ``tests/ttoseq``.
-    result = semOverloadedCall(c, n, nOrig, 
+    result = semOverloadedCall(c, n, nOrig,
       {skProc, skMethod, skConverter, skMacro, skTemplate, skIterator})
   else:
     result = semOverloadedCall(c, n, nOrig,