new jester compiles

tests/closure/tjester.nim

@@ -0,0 +1,32 @@
+discard """
+  output: '''baro0'''
+"""
+
+type
+  Future[T] = ref object
+    data: T
+    callback: proc () {.closure.}
+
+proc cbOuter(response: string) {.closure, discardable.} =
+  iterator cbIter(): Future[int] {.closure.} =
+    for i in 0..7:
+      proc foo(): int =
+        iterator fooIter(): Future[int] {.closure.} =
+          echo response, i
+          yield Future[int](data: 17)
+        var iterVar = fooIter
+        iterVar().data
+      yield Future[int](data: foo())
+      
+  var iterVar2 = cbIter
+  proc cb2() {.closure.} =
+    try:
+      if not finished(iterVar2):
+        let next = iterVar2()
+        if next != nil:
+          next.callback = cb2
+    except:
+      echo "WTF"
+  cb2()
+
+cbOuter "baro"