closes #3242. review by community.

1 files changed, 49 insertions, 0 deletions

diff --git a/test/files/run/t3242.scala b/test/files/run/t3242.scala
new file mode 100644
index 0000000000..f8defaa5cd
--- /dev/null
+++ b/test/files/run/t3242.scala
@@ -0,0 +1,49 @@
+object Test {
+
+ def benchmarkA(num: Int) {
+
+   type A = Int
+
+   def updateM[M[_]](ms: M[A], update: (M[A], A)=>M[A]): M[A] = {
+     var is = ms
+     for (i <- 0 until num) is = update(is, i)
+     is
+   }
+
+   //
+   def vectorAppend: Vector[A] = updateM[Vector](Vector(), (as, a)=>{
+     val v = (as :+ a)
+     //println("==>append:    i: "+i1+", v: "+v)
+     v
+   })
+   // this will crash, Vector bug!
+   def vectorRemove(vec: Vector[A]): Vector[A] = updateM[Vector](vec, (as, a)=>{
+     val v = (as filterNot{ _ == a})
+     //val v = (is filter{ _ != i})
+     //println("==>remove:    i: "+a)
+     v
+   })
+
+   val ct = vectorAppend
+   println(" append [num: "+num+"] vec")
+   vectorRemove(ct)
+   println(" remove [num: "+num+"] vec")
+ } // BenchmarkA
+
+ def comparison(num: Int): Unit = {
+   for (i <- 1 until 5) benchmarkA(num*i)
+   println(">> comparison done, num: "+num);
+ }
+
+ def main(args: Array[String]): Unit = {
+   try {
+     //createBenchmarkA(23).testRun
+
+     comparison(200) // OK
+     comparison(2000) // this will crach
+
+   } catch {
+     case e: Exception => e.printStackTrace()
+   }
+ }
+}