--- libgig/trunk/src/gig.cpp	2021/05/12 18:31:25	3903
+++ libgig/trunk/src/gig.cpp	2021/05/12 18:55:31	3904
@@ -2,7 +2,7 @@
  *                                                                         *
  *   libgig - C++ cross-platform Gigasampler format file access library    *
  *                                                                         *
- *   Copyright (C) 2003-2020 by Christian Schoenebeck                      *
+ *   Copyright (C) 2003-2021 by Christian Schoenebeck                      *
  *                              <cuse@users.sourceforge.net>               *
  *                                                                         *
  *   This library is free software; you can redistribute it and/or modify  *
@@ -3951,6 +3951,8 @@
      * @throws gig::Exception if requested zone could not be splitted
      */
     void Region::SplitDimensionZone(dimension_t type, int zone) {
+        if (!Dimensions)
+            throw gig::Exception("Could not split dimension zone, because there is no dimension at all.");
         dimension_def_t* oldDef = GetDimensionDefinition(type);
         if (!oldDef)
             throw gig::Exception("Could not split dimension zone, no such dimension of given type");
@@ -3977,7 +3979,7 @@
         // requested by the arguments of this method call) to the temporary
         // region, and don't use Region::CopyAssign() here for this task, since
         // it would also alter fast lookup helper variables here and there
-        dimension_def_t newDef;
+        dimension_def_t newDef = {};
         for (int i = 0; i < Dimensions; ++i) {
             dimension_def_t def = pDimensionDefinitions[i]; // copy, don't reference
             // is this the dimension requested by the method arguments? ...
@@ -3988,6 +3990,9 @@
             }
             tempRgn->AddDimension(&def);
         }
+        // silence clang sanitizer warning
+        if (newDef.dimension == dimension_none)
+            throw gig::Exception("Unexpected internal failure resolving dimension in SplitDimensionZone() [this is a bug].");
 
         // find the dimension index in the tempRegion which is the dimension
         // type passed to this method (paranoidly expecting different order)