NoSuchElementException in case of Extract Variable with multi-mappings

[tsantalis]

java.util.NoSuchElementException
at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1513)
at java.base/java.util.HashMap$KeyIterator.next(HashMap.java:1534)
at org.refactoringminer.astDiff.matchers.ExtendedMultiMappingStore.getSrcToDstMono(ExtendedMultiMappingStore.java:70)
at org.refactoringminer.astDiff.matchers.ExtendedMultiMappingStore.getMonoMappingStore(ExtendedMultiMappingStore.java:102)
at org.refactoringminer.astDiff.actions.ASTDiff.(ASTDiff.java:27)
at org.refactoringminer.astDiff.matchers.ProjectASTDiffer.process(ProjectASTDiffer.java:118)
at org.refactoringminer.astDiff.matchers.ProjectASTDiffer.makeASTDiff(ProjectASTDiffer.java:69)
at org.refactoringminer.astDiff.matchers.ProjectASTDiffer.diff(ProjectASTDiffer.java:50)
at org.refactoringminer.astDiff.matchers.ProjectASTDiffer.(ProjectASTDiffer.java:37)

In commit spring-projects/spring-data-neo4j@ef2a0d6?diff=split#diff-7f8b71d8f4360bb48c12bb4cad109e67a8f322b0973b0b760619a90e75ef1c91

There is a case of Extract Variable with multi-mappings in file
spring-data-neo4j/src/main/java/org/springframework/data/neo4j/repository/query/GraphRepositoryQuery.java

parameters[i] is extracted from two different places into
Object parameterValue = session.resolveGraphIdFor(parameters[i]);
and
parameterValue = parameters[i];

So, there are 2 pairs of multi-mappings.

[tsantalis]

I found another instance of this problem in commit
apache/giraph@03ade42

java.util.NoSuchElementException
at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1513)
at java.base/java.util.HashMap$KeyIterator.next(HashMap.java:1534)
at org.refactoringminer.astDiff.matchers.ExtendedMultiMappingStore.getSrcToDstMono(ExtendedMultiMappingStore.java:70)
at org.refactoringminer.astDiff.matchers.ExtendedMultiMappingStore.getMonoMappingStore(ExtendedMultiMappingStore.java:102)
at org.refactoringminer.astDiff.actions.ChawatheScriptGenerator.computeActions(ChawatheScriptGenerator.java:42)
at org.refactoringminer.astDiff.actions.SimplifiedChawatheScriptGenerator.computeActions(SimplifiedChawatheScriptGenerator.java:21)
at org.refactoringminer.astDiff.actions.ASTDiff.computeEditScript(ASTDiff.java:62)
at org.refactoringminer.astDiff.matchers.ProjectASTDiffer.computeAllEditScripts(ProjectASTDiffer.java:62)
at org.refactoringminer.astDiff.matchers.ProjectASTDiffer.diff(ProjectASTDiffer.java:56)
at org.refactoringminer.astDiff.matchers.ProjectASTDiffer.(ProjectASTDiffer.java:37)
at org.refactoringminer.rm1.GitHistoryRefactoringMinerImpl.diffAtCommit(GitHistoryRefactoringMinerImpl.java:1021)