[main] ERROR org.opendaylight.yangtools.yang.parser.stmt.reactor.BuildGlobalContext - Failed to parse YANG from source SourceSpecificContext [source=YangIRStatementStreamSource[source=YangIRModuleSource{identifier=SourceIdentifier [bar]}, escaping=RFC6020, prefixToModule={bar=QNameModule{ns=bar, rev=2016-07-19}, foo=QNameModule{ns=foo, rev=2016-07-19}}], current=EFFECTIVE_MODEL, finished=FULL_DECLARATION]: Grouping '(bar?revision=2016-07-19)foo-imp-grp' was not resolved. [at /w/workspace/yangtools-sonar/parser/yang-parser-rfc7950/target/test-classes/bugs/bug6240/incorrect/bar.yang:11:5]