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-rw-r--r--tests/parallel/tconvexhull.nim22
1 files changed, 9 insertions, 13 deletions
diff --git a/tests/parallel/tconvexhull.nim b/tests/parallel/tconvexhull.nim
index c4990bf2d..a89aa910b 100644
--- a/tests/parallel/tconvexhull.nim
+++ b/tests/parallel/tconvexhull.nim
@@ -1,12 +1,7 @@
 discard """
-  output: '''true
-true
-true
-true
-true
-true'''
-
-ccodeCheck: "\\i ! @'deepCopy(' .*"
+  matrix: "--mm:refc"
+  output: '''
+'''
 """
 
 # parallel convex hull for Nim bigbreak
@@ -55,10 +50,11 @@ proc convex_hull[T](points: var seq[T], cmp: proc(x, y: T): int {.closure.}) : s
       ul[k] = spawn half[T](points, k == 0)
   result = concat(^ul[0], ^ul[1])
 
-var s = map(toSeq(0..999999), proc(x: int): Point = (float(x div 1000), float(x mod 1000)))
+var s = map(toSeq(0..9999), proc(x: int): Point = (float(x div 100), float(x mod 100)))
+# On some runs, this pool size reduction will set the "shutdown" attribute on the
+# worker thread that executes our spawned task, before we can read the flowvars.
 setMaxPoolSize 2
 
-#echo convex_hull[Point](s, cmpPoint)
-for i in 0..5:
-  echo convex_hull[Point](s, cmpPoint) ==
-      @[(0.0, 0.0), (999.0, 0.0), (999.0, 999.0), (0.0, 999.0)]
+for i in 0..2:
+  doAssert convex_hull[Point](s, cmpPoint) ==
+      @[(0.0, 0.0), (99.0, 0.0), (99.0, 99.0), (0.0, 99.0)]