Hi - I am trying to write some unit tests for Datomic using core.match to
keep things succinct.  I was hoping to use a match pattern like this:

    [ {:e tx-eid  :a :db/txInstant        :v _              :tx tx-eid
:added true}
      {:e _       :a :community/category  :v "free stuff"   :tx tx-eid
:added false} ]

to show that the transaction EID (tx-eid) shows up in 3 places in the
datoms result of a transaction.  However, I am getting the error:

Exception in thread "main" java.lang.AssertionError: Pattern row 1: Pattern
row reuses wildcards in [[{:e tx-eid, :a :db/txInstant, :v _, :tx tx-eid,
:added true} {:e _, :a :community/category, :v "free stuff", :tx tx-eid,
:added false}]].  The following wildcards are ambiguous: tx-eid.  There's
no guarantee that the matched values will be same.  Rename the occurrences
uniquely.,


So I am apparently unable to use core.match in the way I was hoping.  Are
there any workarounds to this problem?

Thanks,
Alan

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