[MNG-4623] model parsing errors can be less helpful in Maven 3

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-3/trunk@931492 13f79535-47bb-0310-9956-ffa450edef68

maven-model-builder/src/main/java/org/apache/maven/model/building/DefaultModelBuilder.java

@@ -362,7 +362,15 @@ public class DefaultModelBuilder
 
                 options.put( ModelProcessor.IS_STRICT, Boolean.FALSE );
 
+                try
+                {
                     model = modelProcessor.read( modelSource.getInputStream(), options );
+                }
+                catch ( ModelParseException ne )
+                {
+                    // still unreadable even in non-strict mode, rethrow original error
+                    throw e;
+                }
 
                 if ( pomFile != null )
                 {