Program: 11740
Project: 11740
Buggy source:
public final boolean validateEOperationSignatures(EClass eClass,EList<EOperation> eOperations,Collection<EOperation> otherEOperations,DiagnosticChain diagnostics,Map<Object,Object> context){
  boolean result=true;
  for (  EOperation eOperation : eOperations) {
    if (!ignoreOperationsWithSuppressedVisibility || !EcoreUtil.isSuppressedVisibility(eOperation)) {
      String name=eOperation.getName();
      if (name != null) {
        EList<EParameter> eParameters=eOperation.getEParameters();
        int eParameterSize=eParameters.size();
        LOOP:         for (        EOperation otherEOperation : otherEOperations) {
          if (otherEOperation == eOperation) {
            break;
          }
 else {
            String otherName=otherEOperation.getName();
            if (name.equals(otherName)) {
              EList<EParameter> otherEParmeters=otherEOperation.getEParameters();
              if (otherEParmeters.size() == eParameterSize) {
                for (int i=0; i < eParameterSize; ++i) {
                  EParameter eParameter=eParameters.get(i);
                  EParameter otherEParameter=otherEParmeters.get(i);
                  EClassifier eType=eParameter.getEType();
                  EClassifier otherEType=otherEParameter.getEType();
                  if (eType != otherEType) {
                    if (eType != null && otherEType != null) {
                      String instanceClassName=eType.getInstanceClassName();
                      String otherInstanceClassName=otherEType.getInstanceClassName();
                      if (instanceClassName != otherInstanceClassName || instanceClassName == null || eParameter.isMany() != otherEParameter.isMany()) {
                        continue LOOP;
                      }
                    }
 else {
                      continue LOOP;
                    }
                  }
 else                   if (eParameter.isMany() != otherEParameter.isMany()) {
                    continue LOOP;
                  }
                }
                if (diagnostics == null) {
                  return false;
                }
 else {
                  result=false;
                  diagnostics.add(createDiagnostic(Diagnostic.ERROR,DIAGNOSTIC_SOURCE,messageCode,messageKey,new Object[]{getObjectLabel(getTarget(otherEOperation),context),getObjectLabel(eOperation,context)},new Object[]{eClass,getTarget(otherEOperation),eOperation,EcorePackage.Literals.ECLASS__EALL_OPERATIONS},context));
                }
              }
            }
          }
        }
      }
    }
  }
  return result;
}

Fixed version (ground truth):
public final boolean validateEOperationSignatures(EClass eClass,EList<EOperation> eOperations,Collection<EOperation> otherEOperations,DiagnosticChain diagnostics,Map<Object,Object> context){
  boolean result=true;
  for (  EOperation eOperation : eOperations) {
    if (!ignoreOperationsWithSuppressedVisibility || !EcoreUtil.isSuppressedVisibility(eOperation)) {
      String name=eOperation.getName();
      if (name != null) {
        EList<EParameter> eParameters=eOperation.getEParameters();
        int eParameterSize=eParameters.size();
        LOOP:         for (        EOperation otherEOperation : otherEOperations) {
          if (otherEOperation == eOperation) {
            break;
          }
 else {
            String otherName=otherEOperation.getName();
            if (name.equals(otherName)) {
              EList<EParameter> otherEParmeters=otherEOperation.getEParameters();
              if (otherEParmeters.size() == eParameterSize) {
                for (int i=0; i < eParameterSize; ++i) {
                  EParameter eParameter=eParameters.get(i);
                  EParameter otherEParameter=otherEParmeters.get(i);
                  EClassifier eType=eParameter.getEType();
                  EClassifier otherEType=otherEParameter.getEType();
                  if (eType != otherEType) {
                    if (eType != null && otherEType != null) {
                      String instanceClassName=eType.getInstanceClassName();
                      String otherInstanceClassName=otherEType.getInstanceClassName();
                      if (instanceClassName != otherInstanceClassName || instanceClassName == null || eParameter.isMany() != otherEParameter.isMany()) {
                        continue LOOP;
                      }
                    }
 else {
                      continue LOOP;
                    }
                  }
 else                   if (eParameter.isMany() != otherEParameter.isMany()) {
                    continue LOOP;
                  }
                }
                if (diagnostics == null) {
                  return false;
                }
 else {
                  result=false;
                  EModelElement target=getTarget(otherEOperation);
                  diagnostics.add(createDiagnostic(Diagnostic.ERROR,DIAGNOSTIC_SOURCE,messageCode,messageKey,messageCode == DISJOINT_FEATURE_AND_OPERATION_SIGNATURES ? new Object[]{getObjectLabel(eOperation,context),getObjectLabel(target,context)} : new Object[]{getObjectLabel(target,context),getObjectLabel(eOperation,context)},messageCode == DISJOINT_FEATURE_AND_OPERATION_SIGNATURES ? new Object[]{eClass,eOperation,target,EcorePackage.Literals.ECLASS__EALL_OPERATIONS} : new Object[]{eClass,target,eOperation,EcorePackage.Literals.ECLASS__EALL_OPERATIONS},context));
                }
              }
            }
          }
        }
      }
    }
  }
  return result;
}