Bug #4473

Updated by Michael Kay over 2 years ago

When the user-supplied `URIResolver`, URIResolver, invoked to resolve the `source-location` supplied to a call on fn:transform, returns null, Saxon 9.9 crashes with a NullPointerException. 

 This only applies when validation = ( lax | strict ) has been requested for the source. 

 This is revealed by qt3extra test fn-transform-7 

 On the development branch the code has been fixed: when the user-supplied URIResolver returns null, we should invoke the default URIResolver, and if this returns null we should report a dynamic error saying the document can't be located.