[DAFFODIL-2123] Exception on error when parsing hex data with trace on

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.4.0
• Component/s: Back End, Diagnostics
• Assignee: Olabusayo Kilo
• Reporter: Olabusayo Kilo
• Created: 08/May/19 14:30
• Updated: 20/May/21 12:34
• Resolved: 27/Jun/19 12:21

Description

When trying to parse hex data with an xsd than causes an error with trace on, I get the error below. 

org.apache.daffodil.exceptions.Abort: Invariant broken: nConsumedBytes.>(0)
org.apache.daffodil.exceptions.Assert$.abort(Assert.scala:129)
org.apache.daffodil.io.DataDumper.convertToChar(Dump.scala:489)
org.apache.daffodil.io.DataDumper.textDump(Dump.scala:150)
org.apache.daffodil.io.DataDumper.$anonfun$dumpHexAndTextBytes$2(Dump.scala:297)
at org.apache.daffodil.exceptions.Assert$.abort(Assert.scala:129)
at org.apache.daffodil.io.DataDumper.convertToChar(Dump.scala:489)
at org.apache.daffodil.io.DataDumper.textDump(Dump.scala:150)
at org.apache.daffodil.io.DataDumper.$anonfun$dumpHexAndTextBytes$2(Dump.scala:297)
at scala.runtime.java8.JFunction1$mcVJ$sp.apply(JFunction1$mcVJ$sp.java:12)
at scala.collection.immutable.NumericRange.foreach(NumericRange.scala:71)
at org.apache.daffodil.io.DataDumper.dumpHexAndTextBytes(Dump.scala:264)
at org.apache.daffodil.io.DataDumper.dump(Dump.scala:129)
at org.apache.daffodil.processors.DataLoc.dumpStream(DataLoc.scala:144)
at org.apache.daffodil.processors.DataLoc.dump(DataLoc.scala:104)
at org.apache.daffodil.debugger.InteractiveDebugger$DebugCommandBase$Info$InfoData$.printData(InteractiveDebugger.scala:1313)
at org.apache.daffodil.debugger.InteractiveDebugger$DebugCommandBase$Info$InfoData$.act(InteractiveDebugger.scala:1346)
at org.apache.daffodil.debugger.InteractiveDebugger$DebugCommandBase$Info$.$anonfun$act$20(InteractiveDebugger.scala:1202)
at scala.collection.IndexedSeqOptimized.foreach(IndexedSeqOptimized.scala:32)
at scala.collection.IndexedSeqOptimized.foreach$(IndexedSeqOptimized.scala:29)
at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:38)
at org.apache.daffodil.debugger.InteractiveDebugger$DebugCommandBase$Info$.act(InteractiveDebugger.scala:1200)
at org.apache.daffodil.debugger.InteractiveDebugger$DebugCommandBase$.act(InteractiveDebugger.scala:682)
at org.apache.daffodil.debugger.InteractiveDebugger$DebugCommand.apply(InteractiveDebugger.scala:472)
at org.apache.daffodil.debugger.InteractiveDebugger.runCommand(InteractiveDebugger.scala:433)
at org.apache.daffodil.debugger.InteractiveDebugger.$anonfun$debugStep$4(InteractiveDebugger.scala:174)
at scala.collection.immutable.List.foreach(List.scala:389)
at scala.collection.generic.TraversableForwarder.foreach(TraversableForwarder.scala:35)
at scala.collection.generic.TraversableForwarder.foreach$(TraversableForwarder.scala:35)
at scala.collection.mutable.ListBuffer.foreach(ListBuffer.scala:44)
at org.apache.daffodil.debugger.InteractiveDebugger.$anonfun$debugStep$1(InteractiveDebugger.scala:173)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at org.apache.daffodil.ExecutionMode$.$anonfun$usingUnrestrictedMode$1(ExecutionMode.scala:66)
at org.apache.daffodil.debugger.InteractiveDebugger.debugStep(InteractiveDebugger.scala:153)
at org.apache.daffodil.debugger.InteractiveDebugger.startElement(InteractiveDebugger.scala:209)
at org.apache.daffodil.events.MultipleEventHandler.$anonfun$startElement$1(ParseEventHandler.scala:117)
at org.apache.daffodil.events.MultipleEventHandler.$anonfun$startElement$1$adapted(ParseEventHandler.scala:117)
at scala.collection.immutable.List.foreach(List.scala:389)
at org.apache.daffodil.events.MultipleEventHandler.startElement(ParseEventHandler.scala:117)
at org.apache.daffodil.events.MultipleEventHandler.startElement$(ParseEventHandler.scala:115)
at org.apache.daffodil.processors.DataProcessor.startElement(Runtime.scala:92)
at org.apache.daffodil.processors.parsers.ElementParserBase.parse(ElementCombinator1.scala:141)
at org.apache.daffodil.processors.parsers.Parser.parse1(Parser.scala:76)
at org.apache.daffodil.processors.parsers.Parser.parse1$(Parser.scala:70)
at org.apache.daffodil.processors.parsers.CombinatorParser.parse1(Parser.scala:154)
at org.apache.daffodil.processors.DataProcessor.doParse(Runtime.scala:223)
at org.apache.daffodil.processors.DataProcessor.$anonfun$parse$1(Runtime.scala:196)
at scala.util.DynamicVariable.withValue(DynamicVariable.scala:58)
at org.apache.daffodil.ExecutionMode$.$anonfun$usingRuntimeMode$1(ExecutionMode.scala:65)
at org.apache.daffodil.processors.DataProcessor.parse(Runtime.scala:188)
at org.apache.daffodil.processors.DataProcessor.parse(Runtime.scala:184)
at org.apache.daffodil.Main$.$anonfun$run$1(Main.scala:862)
at org.apache.daffodil.util.Timer$.getTimeResult(Timer.scala:76)
at org.apache.daffodil.util.Timer$.getResult(Timer.scala:35)
at org.apache.daffodil.Main$.run(Main.scala:862)
at org.apache.daffodil.Main$.main(Main.scala:1361)
at org.apache.daffodil.Main.main(Main.scala)

To replicate the error, the following can be done

daffodil --trace parse -Dtransport:Protocol=6 transport:DataLength=79 -s tcp.dfdl.xsd test.dump

If run without --trace, one gets the error below

[warning] Schema Definition Warning: Expression result type (Decimal) should be manually cast to the expected type (UnsignedInt) with the appropriate constructor. Performing deprecated automatic conversion.
Schema context: DataOffset Location line 136 column 16 in file:tcp.dfdl.xsd
[error] Parse Error: Insufficient bits in data. Needed 96 bit(s).
Schema context: Options Location line 143 column 16 in file:tcp.dfdl.xsd
Data location was preceding byte 20

 Attached is the extracted form of tcp from the public PCAP schema: https://github.com/DFDLSchemas/PCAP/blob/master/src/main/resources/com/tresys/pcap/xsd/pcap.dfdl.xsd