fixes #2752

tests/generics/tdont_use_inner_scope.nim

@@ -0,0 +1,27 @@
+
+# bug #2752
+
+import future, sequtils
+
+proc myFilter[T](it: (iterator(): T), f: (proc(anything: T):bool)): (iterator(): T) =
+  iterator aNameWhichWillConflict(): T {.closure.}=
+    for x in it():
+      if f(x):
+        yield x
+  result = aNameWhichWillConflict
+
+
+iterator testIt():int {.closure.}=
+  yield -1
+  yield 2
+
+#let unusedVariable = myFilter(testIt, (x: int) => x > 0)
+
+proc onlyPos(it: (iterator(): int)): (iterator(): int)=
+  iterator aNameWhichWillConflict(): int {.closure.}=
+    var filtered = onlyPos(myFilter(it, (x:int) => x > 0))
+    for x in filtered():
+      yield x
+  result = aNameWhichWillConflict
+
+let x = onlyPos(testIt)