Raise a warning when entering non-existent region

CHANGELOG.md

@@ -77,6 +77,7 @@
     Bug #6343: Magic projectile speed doesn't take race weight into account
     Bug #6347: PlaceItem/PlaceItemCell/PlaceAt should work with levelled creatures
     Bug #6354: SFX abruptly cut off after crossing max distance; implement soft fading of sound effects
+    Bug #6358: Changeweather command does not report an error when entering non-existent region
     Bug #6363: Some scripts in Morrowland fail to work
     Bug #6376: Creatures should be able to use torches
     Bug #6386: Artifacts in water reflection due to imprecise screen-space coordinate computation

apps/openmw/mwscript/skyextensions.cpp

@@ -11,6 +11,8 @@
 #include "../mwbase/environment.hpp"
 #include "../mwbase/world.hpp"
 
+#include "../mwworld/esmstore.hpp"
+
 #include "interpretercontext.hpp"
 
 namespace MWScript
@@ -91,7 +93,11 @@ namespace MWScript
                     Interpreter::Type_Integer id = runtime[0].mInteger;
                     runtime.pop();
 
-                    MWBase::Environment::get().getWorld()->changeWeather(region, id);
+                    const ESM::Region* reg = MWBase::Environment::get().getWorld()->getStore().get<ESM::Region>().search(region);
+                    if (reg)
+                        MWBase::Environment::get().getWorld()->changeWeather(region, id);
+                    else
+                        runtime.getContext().report("Warning: Region \"" + region + "\" was not found");
                 }
         };