Fix memory issues

src/interpreter.c

@@ -95,7 +95,7 @@ void addVariable(GroundVariable **head, const char *id, GroundValue data) {
     }
     GroundVariable* item = malloc(sizeof(GroundVariable));
     snprintf(item->id, MAX_ID_LEN, "%s", id);
-    item->value = data;
+    item->value = copyGroundValue(&data);
     HASH_ADD_STR(*head, id, item);
 }
 
@@ -129,7 +129,7 @@ void interpretGroundInstruction(GroundInstruction inst, GroundScope* scope) {
             GroundVariable* variable = findVariable(*scope->variables, in->args.args[i].value.refName);
             if (variable) {
                 free(in->args.args[i].value.refName); // Free the strdup'd refName
-                in->args.args[i].value.value = variable->value;
+                in->args.args[i].value.value = copyGroundValue(&variable->value);
                 in->args.args[i].type = VALUE;
             } else {
                 runtimeError(UNKNOWN_VARIABLE, NULL, in, currentInstruction);