claim: SolrResourceLoader.getClassLoader is not defined

Error:
test: Search should find conversation with attached text. (SearchTest):
RSolr::Error::Http: RSolr::Error::Http - 500 Internal Server Error
Error: org.apache.solr.core.SolrResourceLoader.getClassLoader()Ljava/lang/ClassLoader;

java.lang.NoSuchMethodError: org.apache.solr.core.SolrResourceLoader.getClassLoader()Ljava/lang/ClassLoader;
        at org.apache.solr.handler.extraction.ExtractingRequestHandler.inform(ExtractingRequestHandler.java:95)
        at org.apache.solr.core.RequestHandlers$LazyRequestHandlerWrapper.getWrappedHandler(RequestHandlers.java:244)
        at org.apache.solr.core.RequestHandlers$LazyRequestHandlerWrapper.handleRequest(RequestHandlers.java:231)
        at org.apache.solr.core.SolrCore.execute(SolrCore.java:1316)
        at org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:338)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:241)
        at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)
        at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)

evidence to the contrary

>> javap -public -classpath WEB-INF/lib/apache-solr-core-3.5.0.jar org/apache/solr/core/SolrResourceLoader
Compiled from "SolrResourceLoader.java"
public class org.apache.solr.core.SolrResourceLoader extends java.lang.Object implements org.apache.solr.common.ResourceLoader{
    public static final org.slf4j.Logger log;
    public org.apache.solr.core.SolrResourceLoader(java.lang.String, java.lang.ClassLoader, java.util.Properties);
    public org.apache.solr.core.SolrResourceLoader(java.lang.String, java.lang.ClassLoader);
    public org.apache.solr.core.SolrResourceLoader(java.lang.String);
    public static java.lang.String normalizeDir(java.lang.String);
    public java.lang.String getConfigDir();
    public java.lang.String getDataDir();
    public java.util.Properties getCoreProperties();
    public java.io.InputStream openSchema(java.lang.String);
    public java.io.InputStream openConfig(java.lang.String);
    public java.io.InputStream openResource(java.lang.String);
    public java.util.List getLines(java.lang.String)       throws java.io.IOException;
    public java.util.List getLines(java.lang.String, java.lang.String)       throws java.io.IOException;
    public java.util.List getLines(java.lang.String, java.nio.charset.Charset)       throws java.io.IOException;
    public java.lang.Class findClass(java.lang.String, java.lang.String[]);
    public java.lang.Object newInstance(java.lang.String, java.lang.String[]);
    public java.lang.Object newAdminHandlerInstance(org.apache.solr.core.CoreContainer, java.lang.String, java.lang.String[]);
    public java.lang.Object newInstance(java.lang.String, java.lang.String[], java.lang.Class[], java.lang.Object[]);
    public void inform(org.apache.solr.core.SolrCore);
    public void inform(org.apache.solr.common.ResourceLoader);
    public void inform(java.util.Map);
    public static java.lang.String locateSolrHome();
    public static java.lang.String locateInstanceDir();
    public java.lang.String getInstanceDir();
    public java.lang.ClassLoader getClassLoader();
}