scala.MatchError: (List(),(a,1)) (of class scala.Tuple2)

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  1. 0

    What is a reason of match.error?

    Stack Overflow | 2 months ago | Евгений Evgeniy
    scala.MatchError: (List(),(a,1)) (of class scala.Tuple2)
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    GitHub | 2 years ago | lukasz-golebiewski
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    MatchError for PartialFunctions composition with orElse

    Stack Overflow | 1 year ago | Sascha Kolberg
    scala.MatchError: 1 (of class java.lang.Integer)
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    NCut-Introduction fails with FlatTermSetException: Term is not a function

    GitHub | 2 years ago | newca12
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    Root Cause Analysis

    1. scala.MatchError

      (List(),(a,1)) (of class scala.Tuple2)

      at forcomp.A$A183$A$A183$$anonfun$subtract2$1.apply()
    2. forcomp
      A$A183$A$A183$$anonfun$subtract2$1.apply
      1. forcomp.A$A183$A$A183$$anonfun$subtract2$1.apply(temp.sc:11)
      2. forcomp.A$A183$A$A183$$anonfun$subtract2$1.apply(temp.sc:11)
      2 frames
    3. Scala
      List.foldLeft
      1. scala.collection.LinearSeqOptimized$class.foldLeft(temp.sc:120)
      2. scala.collection.immutable.List.foldLeft(temp.sc:80)
      2 frames
    4. forcomp
      A$A183$A$A183.subtract2
      1. forcomp.A$A183$A$A183.subtract2(temp.sc:11)
      1 frame