Program: 153688
Project: 153688
Buggy source:
public boolean sendIssue(final RenderContext renderContext,final JCRNodeWrapper node,final String email,final String user,final String type,final Locale locale,final String workspace,final Map<String,String> newsletterVersions) throws RepositoryException {
  final String id=node.getIdentifier();
  final String key=locale + user + type;
  if (!newsletterVersions.containsKey(key)) {
    JCRTemplate.getInstance().doExecuteWithUserSession(user,workspace,locale,new JCRCallback<String>(){
      public String doInJCR(      JCRSessionWrapper session) throws RepositoryException {
        RenderContext localRenderContext=new RenderContext(renderContext.getRequest(),renderContext.getResponse(),session.getUser());
        HashMap<String,Object> removedAttributes=new HashMap<String,Object>();
        try {
          localRenderContext.setEditMode(false);
          localRenderContext.setWorkspace(workspace);
          localRenderContext.setServletPath("String_Node_Str");
          JCRNodeWrapper node=session.getNodeByIdentifier(id);
          Resource resource=new Resource(node,"String_Node_Str","String_Node_Str","String_Node_Str");
          localRenderContext.setMainResource(resource);
          localRenderContext.setSite(node.getResolveSite());
          localRenderContext.setSiteInfo(new SiteInfo(node.getResolveSite()));
          @SuppressWarnings("String_Node_Str") Enumeration attributeNames=renderContext.getRequest().getAttributeNames();
          while (attributeNames.hasMoreElements()) {
            String attr=(String)attributeNames.nextElement();
            if (!attr.startsWith("String_Node_Str")) {
              removedAttributes.put(attr,renderContext.getRequest().getAttribute(attr));
              renderContext.getRequest().removeAttribute(attr);
            }
          }
          String out=renderService.render(resource,localRenderContext);
          out=htmlExternalizationService.externalize(out,localRenderContext);
          newsletterVersions.put(key,out);
          String title=node.getName();
          if (node.hasProperty("String_Node_Str")) {
            title=node.getProperty("String_Node_Str").getString();
          }
          newsletterVersions.put(key + "String_Node_Str",title);
        }
 catch (        RenderException e) {
          throw new RepositoryException(e);
        }
 finally {
          for (          String key : removedAttributes.keySet()) {
            renderContext.getRequest().setAttribute(key,removedAttributes.get(key));
          }
        }
        return null;
      }
    }
);
  }
  String out=newsletterVersions.get(key);
  String subject=newsletterVersions.get(key + "String_Node_Str");
  if (logger.isDebugEnabled()) {
    logger.debug("String_Node_Str" + email + "String_Node_Str"+ subject);
    logger.debug(out);
  }
  return mailService.sendHtmlMessage(mailService.defaultSender(),email,null,null,subject,out);
}

Fixed version (ground truth):
public boolean sendIssue(final RenderContext renderContext,final JCRNodeWrapper node,final String email,final JahiaUser user,final String type,final Locale locale,final String workspace,final Map<String,String> newsletterVersions) throws RepositoryException {
  final String id=node.getIdentifier();
  final String key=locale + user.getName() + type;
  if (!newsletterVersions.containsKey(key)) {
    JCRTemplate.getInstance().doExecute(user,workspace,locale,new JCRCallback<String>(){
      public String doInJCR(      JCRSessionWrapper session) throws RepositoryException {
        RenderContext localRenderContext=new RenderContext(renderContext.getRequest(),renderContext.getResponse(),session.getUser());
        HashMap<String,Object> removedAttributes=new HashMap<String,Object>();
        try {
          localRenderContext.setEditMode(false);
          localRenderContext.setWorkspace(workspace);
          localRenderContext.setServletPath("String_Node_Str");
          JCRNodeWrapper node=session.getNodeByIdentifier(id);
          Resource resource=new Resource(node,"String_Node_Str","String_Node_Str","String_Node_Str");
          localRenderContext.setMainResource(resource);
          localRenderContext.setSite(node.getResolveSite());
          localRenderContext.setSiteInfo(new SiteInfo(node.getResolveSite()));
          @SuppressWarnings("String_Node_Str") Enumeration attributeNames=renderContext.getRequest().getAttributeNames();
          while (attributeNames.hasMoreElements()) {
            String attr=(String)attributeNames.nextElement();
            if (!attr.startsWith("String_Node_Str")) {
              removedAttributes.put(attr,renderContext.getRequest().getAttribute(attr));
              renderContext.getRequest().removeAttribute(attr);
            }
          }
          String out=renderService.render(resource,localRenderContext);
          out=htmlExternalizationService.externalize(out,localRenderContext);
          newsletterVersions.put(key,out);
          String title=node.getName();
          if (node.hasProperty("String_Node_Str")) {
            title=node.getProperty("String_Node_Str").getString();
          }
          newsletterVersions.put(key + "String_Node_Str",title);
        }
 catch (        RenderException e) {
          throw new RepositoryException(e);
        }
 finally {
          for (          String key : removedAttributes.keySet()) {
            renderContext.getRequest().setAttribute(key,removedAttributes.get(key));
          }
        }
        return null;
      }
    }
);
  }
  String out=newsletterVersions.get(key);
  String subject=newsletterVersions.get(key + "String_Node_Str");
  if (logger.isDebugEnabled()) {
    logger.debug("String_Node_Str" + email + "String_Node_Str"+ subject);
    logger.debug(out);
  }
  return mailService.sendHtmlMessage(mailService.defaultSender(),email,null,null,subject,out);
}