Added better error reporting for unclear crashes

client/CPlayerInterface.cpp

@@ -182,6 +182,9 @@ void CPlayerInterface::closeAllDialogs()
 		if(infoWindow && infoWindow->ID != QueryID::NONE)
 			break;
 
+		if (topWindow == nullptr)
+			throw std::runtime_error("Invalid or non-existing top window! Total windows: " + std::to_string(GH.windows().count()));
+
 		topWindow->close();
 	}
 }

client/gui/CIntObject.cpp

@@ -343,6 +343,9 @@ WindowBase::WindowBase(int used_, Point pos_)
 void WindowBase::close()
 {
 	if(!GH.windows().isTopWindow(this))
-		throw std::runtime_error("Only top interface can be closed");
+	{
+		auto topWindow = GH.windows().topWindow<IShowActivatable>().get();
+		throw std::runtime_error(std::string("Only top interface can be closed! Top window is ") + typeid(*this).name() + " but attempted to close " + typeid(*topWindow).name());
+	}
 	GH.windows().popWindows(1);
 }

client/render/CAnimation.cpp

@@ -212,10 +212,17 @@ void CAnimation::createFlippedGroup(const size_t sourceGroup, const size_t targe
 
 ImageLocator CAnimation::getImageLocator(size_t frame, size_t group) const
 {
-	const ImageLocator & locator = source.at(group).at(frame);
+	try
+	{
+		const ImageLocator & locator = source.at(group).at(frame);
 
-	if (!locator.empty())
-		return locator;
+		if (!locator.empty())
+			return locator;
+	}
+	catch (std::out_of_range &)
+	{
+		throw std::runtime_error("Frame " + std::to_string(frame) + " of group " + std::to_string(group) + " is missing from animation " + name.getOriginalName() );
+	}
 
 	return ImageLocator(name, frame, group);
 }

lib/mapObjects/CGTownInstance.cpp

@@ -394,8 +394,15 @@ void CGTownInstance::initializeConfigurableBuildings(vstd::RNG & rand)
 {
 	for(const auto & kvp : getTown()->buildings)
 	{
-		if(!kvp.second->rewardableObjectInfo.getParameters().isNull())
+		if(kvp.second->rewardableObjectInfo.getParameters().isNull())
+			continue;
+
+		try {
 			rewardableBuildings[kvp.first] = new TownRewardableBuildingInstance(this, kvp.second->bid, rand);
+		}
+		catch (std::runtime_error & e) {
+			throw std::runtime_error("Failed to load rewardable building data for " + kvp.second->getJsonKey() + " Reason: " + e.what());
+		}
 	}
 }