While testing DFDL-568 which focused on cases where the parent length was greater than the overall length of its children, I added a test case where the length of the parent was less than the overall length of its children to see what would happen. I expected it to fail, and currently it does, but it does not give an appropriate error message.

Currently, it gives the following error message:
[info] - test_ExplicitLengthChildLengthMoreParent_Chars *** FAILED ***
[info] edu.illinois.ncsa.daffodil.exceptions.Abort: Invariant broken.
[info] edu.illinois.ncsa.daffodil.exceptions.Assert$.abort(Assert.scala:87)
[info] edu.illinois.ncsa.daffodil.exceptions.Assert$.invariant(Assert.scala:115)
[info] edu.illinois.ncsa.daffodil.processors.SpecifiedLengthParserBase.parse(SpecifiedLength.scala:167)
[info] edu.illinois.ncsa.daffodil.processors.SpecifiedLengthExplicitCharactersFixedParser$$anonfun$parse$6.apply(SpecifiedLength.scala:333)
[info] at edu.illinois.ncsa.daffodil.exceptions.Assert$.abort(Assert.scala:87)
[info] at edu.illinois.ncsa.daffodil.exceptions.Assert$.invariant(Assert.scala:115)
[info] at edu.illinois.ncsa.daffodil.processors.SpecifiedLengthParserBase.parse(SpecifiedLength.scala:167)
[info] at edu.illinois.ncsa.daffodil.processors.SpecifiedLengthExplicitCharactersFixedParser$$anonfun$parse$6.apply(SpecifiedLength.scala:333)
[info] at edu.illinois.ncsa.daffodil.processors.SpecifiedLengthExplicitCharactersFixedParser$$anonfun$parse$6.apply(SpecifiedLength.scala:322)
[info] at edu.illinois.ncsa.daffodil.processors.WithParseErrorThrowing$class.withParseErrorThrowing(Parser.scala:220)
[info] at edu.illinois.ncsa.daffodil.processors.SpecifiedLengthParserBase.withParseErrorThrowing(SpecifiedLength.scala:149)
[info] at edu.illinois.ncsa.daffodil.processors.SpecifiedLengthExplicitCharactersFixedParser.parse(SpecifiedLength.scala:322)
[info] at edu.illinois.ncsa.daffodil.processors.Parser.parse1(Parser.scala:132)
[info] at edu.illinois.ncsa.daffodil.processors.SeqCompParser$$anonfun$parse$3.apply(Parser.scala:319)
[info] ...

The test (test_ExplicitLengthChildLengthMoreParent_Chars) has been added to daffodil-test/src/test/scala-debug/edu/illinois/ncsa/daffodil/section12/lengthKind/TestLengthKindExplicitDebug.scala