tdisjoint_slice2 works

tests/parallel/tdisjoint_slice2.nim

@@ -1,3 +1,15 @@
+discard """
+  output: '''0
+1
+2
+3
+4
+5
+6
+7
+8'''
+  sortoutput: true
+"""
 
 import threadpool
 
@@ -7,12 +19,12 @@ proc f(a: openArray[int]) =
 proc f(a: int) = echo a
 
 proc main() =
-  var a: array[0..30, int]
+  var a: array[0..9, int] = [0,1,2,3,4,5,6,7,8,9]
   parallel:
-    spawn f(a[0..15])
+    spawn f(a[0..2])
     #spawn f(a[16..30])
-    var i = 16
-    while i <= 29:
+    var i = 3
+    while i <= 8:
       spawn f(a[i])
       spawn f(a[i+1])
       inc i, 2