Assert input stream validity when reading XML.

As was discovered in 2bc6f8c810, every other ParameterHandler method
that takes an input stream argument and reads from it throws an
exception if the input stream is not in a valid state.

diff --git a/source/base/parameter_handler.cc b/source/base/parameter_handler.cc
index 33056d14c8f72fb3e1b29f204ab42cc99a34fa77..7d92047a2a2d20d54ad51eca7f30975c73cbad89 100644 (file)
--- a/source/base/parameter_handler.cc
+++ b/source/base/parameter_handler.cc
@@ -1862,6 +1862,7 @@ namespace
 
 bool ParameterHandler::read_input_from_xml (std::istream &in)
 {
+  AssertThrow(in, ExcIO());
   // read the XML tree assuming that (as we
   // do in print_parameters(XML) it has only
   // a single top-level node called