Occasional import mismatch in new yang statement parser

Attached yang sources cause occasionally IllegalStateException: Type '(urn:ietf:params:xml:ns:yang:ietf-yang-types?revision=2010-09-24)date-and-time'
due to import mismatch.

Debugging shows for now the following:
The prerequisite "importedModule = imported.get();" on line 97 in ImportStatementDefinition returns RootStatementContext of Module which does not match with required ModuleIdentifier ("impIdentifier").

Exception stack trace is attached below:

java.lang.IllegalStateException: Type '(urn:ietf:params:xml:ns:yang:ietf-yang-types?revision=2010-09-24)date-and-time' was not found in /home/yangtools/yang/yang-parser-impl/target/test-classes/semantic-statement-parser/multiple-revisions/simple/ietf-interfaces.yang:11:8.
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.ExtendedTypeEffectiveStatementImpl.parseBaseTypeFromCtx(ExtendedTypeEffectiveStatementImpl.java:133)
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.ExtendedTypeEffectiveStatementImpl.<init>(ExtendedTypeEffectiveStatementImpl.java:89)
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.TypeStatementImpl$Definition.createEffective(TypeStatementImpl.java:103)
at org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.buildEffective(StatementContextBase.java:365)
at org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils$2.apply(StmtContextUtils.java:40)
at org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils$2.apply(StmtContextUtils.java:1)
at com.google.common.collect.Iterators$8.transform(Iterators.java:799)
at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:271)
at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:226)
at com.google.common.collect.FluentIterable.toList(FluentIterable.java:373)
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.EffectiveStatementBase.<init>(EffectiveStatementBase.java:74)
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.AbstractEffectiveDocumentedNode.<init>(AbstractEffectiveDocumentedNode.java:24)
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.LeafEffectiveStatementImpl.<init>(LeafEffectiveStatementImpl.java:46)
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.LeafStatementImpl$Definition.createEffective(LeafStatementImpl.java:59)
at org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.buildEffective(StatementContextBase.java:365)
at org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils$2.apply(StmtContextUtils.java:40)
at org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils$2.apply(StmtContextUtils.java:1)
at com.google.common.collect.Iterators$8.transform(Iterators.java:799)
at com.google.common.collect.TransformedIterator.next(TransformedIterator.java:48)
at com.google.common.collect.ImmutableCollection$Builder.addAll(ImmutableCollection.java:301)
at com.google.common.collect.ImmutableList$Builder.addAll(ImmutableList.java:691)
at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:275)
at com.google.common.collect.ImmutableList.copyOf(ImmutableList.java:226)
at com.google.common.collect.FluentIterable.toList(FluentIterable.java:373)
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.EffectiveStatementBase.<init>(EffectiveStatementBase.java:74)
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.AbstractEffectiveDocumentedNode.<init>(AbstractEffectiveDocumentedNode.java:24)
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.ModuleEffectiveStatementImpl.<init>(ModuleEffectiveStatementImpl.java:88)
at org.opendaylight.yangtools.yang.parser.stmt.rfc6020.ModuleStatementSupport.createEffective(ModuleStatementSupport.java:62)
at org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase.buildEffective(StatementContextBase.java:365)
at org.opendaylight.yangtools.yang.parser.stmt.reactor.BuildGlobalContext.transformEffective(BuildGlobalContext.java:177)
at org.opendaylight.yangtools.yang.parser.stmt.reactor.BuildGlobalContext.buildEffective(BuildGlobalContext.java:165)
at org.opendaylight.yangtools.yang.parser.stmt.reactor.CrossSourceStatementReactor$BuildAction.buildEffective(CrossSourceStatementReactor.java:105)
at org.opendaylight.yangtools.yang.stmt.test.StmtTestUtils.parseYangSources(StmtTestUtils.java:111)
at org.opendaylight.yangtools.yang.stmt.test.StmtTestUtils.parseYangSources(StmtTestUtils.java:123)
at org.opendaylight.yangtools.yang.stmt.test.StmtTestUtils.parseYangSources(StmtTestUtils.java:137)
at org.opendaylight.yangtools.yang.stmt.test.MoreRevisionsTest.multipleRevisionsSimpleTest(MoreRevisionsTest.java:155)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)