Mike Beckerle created DAFFODIL-2614:
---------------------------------------
Summary: assert failure in schema-defined layer transform appears
to be a Daffodil bug
Key: DAFFODIL-2614
URL: https://issues.apache.org/jira/browse/DAFFODIL-2614
Project: Daffodil
Issue Type: Bug
Components: Back End
Affects Versions: 3.2.1
Reporter: Mike Beckerle
Got this backtrace below when trying to parse a PCAP 2.4 file.
This comes from the IPv4Checksum computation, which is a layer transformer
defined as part of the EthernetIP DFDL schema.
This exception needs to be caught, so that it can be distinguished from a
Daffodil bug. This bug is in the layer transformer, and the message should be
clear about that, and point the user at the schema's layer transformer without
the user having to interpret the backtrace.
```
cat 'FOUO - BData.pcap' | daffodil parse -s
../../dataiti/git/dfdl-schemas/dfdl-pcap/src/main/resources/com/tresys/pcap/xsd/pcap.dfdl.xsd
--
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!! An unexpected exception occurred. This is a bug! !!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Please report this bug and help us fix it:
https://daffodil.apache.org/community/#issue-tracker
Please include the following exception, the command you
ran, and any input, schema, or tdml files used that led
to this bug.
org.apache.daffodil.exceptions.Abort: Invariant broken:
checksumTotal.<=(65535).&&(checksumTotal.>=(0))
org.apache.daffodil.exceptions.Assert$.abort(Assert.scala:137)
com.owlcyberdefense.dfdl.IPv4Checksum.compute(IPv4Checksum.scala:74)
com.owlcyberdefense.dfdl.IPv4Checksum.compute(IPv4Checksum.scala:35)
org.apache.daffodil.layers.ByteBufferExplicitLengthLayerTransform.startLayerForParse(LayerTransformer.scala:361)
at org.apache.daffodil.exceptions.Assert$.abort(Assert.scala:137)
at com.owlcyberdefense.dfdl.IPv4Checksum.compute(IPv4Checksum.scala:74)
at com.owlcyberdefense.dfdl.IPv4Checksum.compute(IPv4Checksum.scala:35)
at
org.apache.daffodil.layers.ByteBufferExplicitLengthLayerTransform.startLayerForParse(LayerTransformer.scala:361)
at
org.apache.daffodil.processors.parsers.LayeredSequenceParser.parse(LayeredSequenceParser.scala:51)
at org.apache.daffodil.processors.parsers.Parser.parse1(Parser.scala:82)
at org.apache.daffodil.processors.parsers.Parser.parse1$(Parser.scala:76)
at
org.apache.daffodil.processors.parsers.CombinatorParser.parse1(Parser.scala:161)
at
org.apache.daffodil.processors.parsers.Unseparated.parseOne(UnseparatedSequenceParsers.scala:29)
```
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