SI-7880 Fix infinite loop in ResizableArray#ensureSize

This issue was triggered for values greater than Int.MaxValue/2, which
caused the computation of the new array size to overflow and become
negative, leading to an infinite loop.

1 files changed, 7 insertions, 0 deletions

diff --git a/test/files/run/t7880.scala b/test/files/run/t7880.scala
new file mode 100644
index 0000000000..9fbc337f87
--- /dev/null
+++ b/test/files/run/t7880.scala
@@ -0,0 +1,7 @@
+object Test extends App {
+  // This should terminate in one way or another, but it shouldn't loop forever.
+  try {
+    val buffer = collection.mutable.ArrayBuffer.fill(Int.MaxValue / 2 + 1)(0)
+    buffer append 1
+  } catch { case _: OutOfMemoryError => }
+}