Add an error when getState is called with wrong stateblock

include/core/state_block/has_state_blocks.h

@@ -349,8 +349,9 @@ inline VectorXd HasStateBlocks::getStateVector(const StateStructure& _structure)
     for (const char key : structure)
     {
         const auto& sb = getStateBlock(key);
-
-        assert(sb != nullptr && "Requested StateBlock key not in the structure");
+        if (sb == nullptr){
+            throw std::runtime_error("Requested StateBlock key not in the structure");
+        }
 
         state.segment(index,sb->getSize()) = sb->getState();
         index += sb->getSize();
@@ -367,8 +368,9 @@ inline VectorComposite HasStateBlocks::getState(const StateStructure& _structure
     for (const auto key : structure)
     {
         const auto& sb = getStateBlock(key);
-
-        assert(sb != nullptr && "Requested StateBlock key not in the structure");
+        if (sb == nullptr){
+            throw std::runtime_error("Requested StateBlock key not in the structure");
+        }
 
         state.emplace(key, sb->getState());
     }

test/gtest_has_state_blocks.cpp

@@ -209,15 +209,6 @@ TEST_F(HasStateBlocksTest, getState_structure)
     ASSERT_TRUE(state0.count('P'));
     ASSERT_FALSE(state0.count('O'));
     ASSERT_TRUE(state0.count('V'));
-
-    state0 = F0->getState("OW"); // W does not exist
-    WOLF_DEBUG("getState(\"OW\") = ", state0);
-    ASSERT_EQ(state0.size(), 1);
-    ASSERT_FALSE(state0.count('P'));
-    ASSERT_TRUE(state0.count('O'));
-    ASSERT_FALSE(state0.count('V'));
-    ASSERT_FALSE(state0.count('W'));
-
 }