e);
            throw problems.newModelBuilderException();
        } catch (IOException e) {
            String msg = e.getMessage();
            if (msg == null || msg.isEmpty()) {
                // NOTE: There's java.nio.charset.MalformedInputException and sun.io.MalformedInputException
                if (e.getClass().getName().endsWith("MalformedInputException")) {

                            + validVersions + ". Building this project requires a newer version of Maven.",
                    tracker);

        } else if (olderThanAll) {
            // note this will not be hit for Maven 1.x project.xml as it is an incompatible schema
            addViolation(
                    problems,
                    Severity.FATAL,
                    Version.V20,

                        for (PluginExecution execution : plugin.getExecutions()) {
                            if (executionId.equals(execution.getId())) {
                                // NOTE: The PluginConfigurationExpander already merged the plugin-level config in
                                dom = (Xpp3Dom) execution.getConfiguration();
                                break;
                            }