🐐 Conditions have to be bools

centvrion/ast_nodes.py

@@ -679,6 +679,8 @@ class SiStatement(Node):
 
   def _eval(self, vtable):
     vtable, cond = self.test.eval(vtable)
+    if not isinstance(cond, ValBool):
+      raise CentvrionError("SI condition must be a boolean")
     last_val = ValNul()
     if cond:
       for statement in self.statements:
@@ -714,6 +716,8 @@ class DumStatement(Node):
   def _eval(self, vtable):
     last_val = ValNul()
     vtable, cond = self.test.eval(vtable)
+    if not isinstance(cond, ValBool):
+      raise CentvrionError("DVM condition must be a boolean")
     while not cond:
       for statement in self.statements:
         vtable, val = statement.eval(vtable)
@@ -726,6 +730,8 @@ class DumStatement(Node):
       if vtable["#return"] is not None:
         break
       vtable, cond = self.test.eval(vtable)
+      if not isinstance(cond, ValBool):
+        raise CentvrionError("DVM condition must be a boolean")
     return vtable, last_val