def stash_my_stuff() {
    stash includes: '**', name: 'my_stash'
}
def unstash_my_stuff() {
    unstash 'my_stash'
}

// on one agent
dir("d:\tmsc") { unstash_my_stuff() }

// later on a different agent
dir("d:\tmsc") { unstash_my_stuff() }

13:23:33 Running in D:tmsc
[Pipeline] {
[Pipeline] unstash
[Pipeline] }
[Pipeline] // dir
[Pipeline] dir
13:24:01 Running in D:tmsc
[Pipeline] {
[Pipeline] End of Pipeline
java.lang.StackOverflowError
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMasrhaller.java:111)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMasrhaller.java:1032)
    at org.jboss.marshalling.river.RiverMarshaller.doSerializableObject(RiverMasrhaller.java:988)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMasrhaller.java:854)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMasrhaller.java:778)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMasrhaller.java:1032)
    at org.jboss.marshalling.river.RiverMarshaller.doSerializableObject(RiverMasrhaller.java:988)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMasrhaller.java:854)
    at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMasrhaller.java:1032)
etc., etc., etc.
sometimes it also includes
    at org.jboss.marshalling.river.RiverMarshaller.doSerializableObject(RiverMasrhaller.java:967)