From ceafb7f7710016f37fcdbf8b03d4cc2f4bc86b3f Mon Sep 17 00:00:00 2001
From: Miran <narimiran@disroot.org>
Date: Sun, 23 Jun 2019 07:28:45 +0200
Subject: [PATCH] [bugfix] fix OrderedTable iterators (#11562)

(cherry picked from commit 3d50f7e2a15efdf1adb61902c7309f8b85691bb6)
---
 lib/pure/collections/tables.nim | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/lib/pure/collections/tables.nim b/lib/pure/collections/tables.nim
index 02db106544..0e1a02b48f 100644
--- a/lib/pure/collections/tables.nim
+++ b/lib/pure/collections/tables.nim
@@ -1253,11 +1253,13 @@ proc enlarge[A, B](t: var OrderedTable[A, B]) =
     h = nxt
 
 template forAllOrderedPairs(yieldStmt: untyped) {.dirty.} =
-  var h = t.first
-  while h >= 0:
-    var nxt = t.data[h].next
-    if isFilled(t.data[h].hcode): yieldStmt
-    h = nxt
+  if t.counter > 0:
+    var h = t.first
+    while h >= 0:
+      var nxt = t.data[h].next
+      if isFilled(t.data[h].hcode):
+        yieldStmt
+      h = nxt
 
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