I investigated this failure briefly, and it appears to be in test "testSequence1" in daffodil-runtime1/src/test/scala/edu/illinois/ncsa/daffodil/dsom/TestDsomCompiler.scala. This file has not changed since the end of June. The error itself is
edu.illinois.ncsa.daffodil.dsom.TestDsomCompiler.testSequence1 failed: edu.illinois.ncsa.daffodil.exceptions.Abort: Exception while logging
This failure does not seem to be related to any changes Beth or I have made (we were the only two on the blame list), and this error did not occur in the automated build that kicked off at 7:45 this morning.