AlterTableDropPartitions fails for non-string columns

spark.sql("drop table if exists tbl_x")
spark.sql("create table tbl_x (a int) partitioned by (p int)")
spark.sql("alter table tbl_x add partition (p=10)")
spark.sql("alter table tbl_x drop partition (p=10)")

scala.MatchError: (cast(p#8 as int) = 10) (of class org.apache.spark.sql.catalyst.expressions.EqualTo)
  at org.apache.spark.sql.execution.command.AlterTableDropPartitionCommand$$anonfun$10$$anonfun$11.apply(ddl.scala:462)
  at org.apache.spark.sql.execution.command.AlterTableDropPartitionCommand$$anonfun$10$$anonfun$11.apply(ddl.scala:462)
  at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
  at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
  at scala.collection.immutable.List.foreach(List.scala:381)
  at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
  at scala.collection.immutable.List.map(List.scala:285)
  at org.apache.spark.sql.execution.command.AlterTableDropPartitionCommand$$anonfun$10.apply(ddl.scala:462)
  at org.apache.spark.sql.execution.command.AlterTableDropPartitionCommand$$anonfun$10.apply(ddl.scala:461)
  at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
  at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
  at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
  at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
  at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
  at scala.collection.AbstractTraversable.map(Traversable.scala:104)
  at org.apache.spark.sql.execution.command.AlterTableDropPartitionCommand.run(ddl.scala:461)
  at org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult$lzycompute(commands.scala:58)
  at org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult(commands.scala:56)
  at org.apache.spark.sql.execution.command.ExecutedCommandExec.doExecute(commands.scala:74)
  at org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
  at org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
  at org.apache.spark.sql.execution.SparkPlan$$anonfun$executeQuery$1.apply(SparkPlan.scala:135)
  at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
  at org.apache.spark.sql.execution.SparkPlan.executeQuery(SparkPlan.scala:132)
  at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:113)
  at org.apache.spark.sql.execution.QueryExecution.toRdd$lzycompute(QueryExecution.scala:87)
  at org.apache.spark.sql.execution.QueryExecution.toRdd(QueryExecution.scala:87)
  at org.apache.spark.sql.Dataset.<init>(Dataset.scala:185)
  at org.apache.spark.sql.Dataset$.ofRows(Dataset.scala:64)
  at org.apache.spark.sql.SparkSession.sql(SparkSession.scala:591)
  ... 39 elided