Extract FE 1.0 related parts from NewConstraintSystem

core/util.runtime/src/org/jetbrains/kotlin/utils/addToStdlib.kt

@@ -172,4 +172,8 @@ inline fun <T, R> Collection<T>.foldMap(transform: (T) -> R, operation: (R, R) -
         result = operation(result, transform(iterator.next()))
     }
     return result
-}
+}
+
+fun <E> MutableList<E>.trimToSize(newSize: Int) {
+    subList(newSize, size).clear()
+}