[DAFFODIL-2375] Warn when it is impossible to unparse a choice branch

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.0
• Fix Version/s: 3.0.0
• Component/s: Diagnostics
• Assignee: Josh Adams
• Reporter: Josh Adams
• Created: 24/Jul/20 16:55
• Updated: 17/Nov/20 19:14
• Resolved: 22/Oct/20 15:41

Description

Discovered this issue while working on a schema project.

While the schema parses fine, for some reason multiple SetVariable parsers are getting instantiated for the same variable, which causes a double-set error to occur.

 

See test_choiceBranchVariables in daffodil-test/src/test/scala/org/apache/daffodil/section07/variables/TestVariables.scala for a test that demonstrates this issue.