Probably related to #678.
columnOf(arrayOf(1)).type shouldBe typeOf<Array<Int>>() but is Array<*> instead.
Other cases, like columnOf(intArrayOf(1)) or columnOf(arrayOf(1, null)) work fine.
DataColumn.createValueColumn("c", listOf(arrayOf(1))) also works fine.
My theory is that it occurs because, due to #678, the classifier of the Array<Int> becomes IntArray, which has no type arguments. Still, it needs to be investigated.