[YANGTOOLS-1485] Fail to process deviation of augmented node without feature support

Blocks — Mon, 20 Mar 2023 10:10:09 +0000

Parsing of YANG models fails if a deviation statement targets a node conditionally augmented based on a feature and the feature is not supported.

In the following example with two modules, foo & bar, parsing fails if foo-feature is not supported.

foo.yang

module foo {
  namespace "urn:foo";
  prefix "foo";

  feature foo-feature;

  container foo {
  }

  augment /foo:foo {
    if-feature foo-feature;

    leaf foo-leaf {
      type string;
    }
  }
}

bar.yang

module bar {
  namespace "urn:bar";
  prefix "bar";

  import foo {
    prefix foo;
  }

  deviation /foo:foo/foo:foo-leaf {
   deviate not-supported;
  }
}

Parsing fails after trying to find the deviation target foo-leaf:

Caused by: org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException: Deviation target 'Absolute{qnames=[(urn:foo)foo, foo-leaf]}' not found. [at /volumes/OpenDaylight/yangtools/parser/yang-parser-rfc7950/target/test-classes/bugs/YT1485/augment/bar.yang:9:3]
	at org.opendaylight.yangtools.yang.parser.rfc7950@10.0.4-SNAPSHOT/org.opendaylight.yangtools.yang.parser.rfc7950.stmt.deviate.AbstractDeviateStatementSupport$1.prerequisiteFailed(AbstractDeviateStatementSupport.java:167)
	at org.opendaylight.yangtools.yang.parser.reactor@10.0.4-SNAPSHOT/org.opendaylight.yangtools.yang.parser.stmt.reactor.ModifierImpl.failModifier(ModifierImpl.java:86)
	at org.opendaylight.yangtools.yang.parser.reactor@10.0.4-SNAPSHOT/org.opendaylight.yangtools.yang.parser.stmt.reactor.SourceSpecificContext.failModifiers(SourceSpecificContext.java:375)
	at org.opendaylight.yangtools.yang.parser.reactor@10.0.4-SNAPSHOT/org.opendaylight.yangtools.yang.parser.stmt.reactor.BuildGlobalContext.addSourceExceptions(BuildGlobalContext.java:307)
	... 80 more

OpenDaylight JIRA

[YANGTOOLS-1485] Fail to process deviation of augmented node without feature support