Merge pull request #2 from nim-lang/devel

Update

1 files changed, 3 insertions, 3 deletions

diff --git a/compiler/ropes.nim b/compiler/ropes.nim
index 358ce8a53..05d5e840c 100644
--- a/compiler/ropes.nim
+++ b/compiler/ropes.nim
@@ -188,11 +188,11 @@ iterator leaves*(r: Rope): string =
     var stack = @[r]
     while stack.len > 0:
       var it = stack.pop
-      while isNil(it.data):
+      while it.left != nil:
+        assert it.right != nil
         stack.add(it.right)
         it = it.left
         assert(it != nil)
-      assert(it.data != nil)
       yield it.data
 
 iterator items*(r: Rope): char =
@@ -251,7 +251,7 @@ proc `%`*(frmt: FormatStr, args: openArray[Rope]): Rope =
         while true:
           j = j * 10 + ord(frmt[i]) - ord('0')
           inc(i)
-          if frmt[i] notin {'0'..'9'}: break
+          if i >= frmt.len or frmt[i] notin {'0'..'9'}: break
         num = j
         if j > high(args) + 1:
           errorHandler(rInvalidFormatStr, $(j))