hdl._ir: derive DriverConflict from Exception instead of UserWarning.

wanda-phi · whitequark · commit 4b49284ccb92 · 2024-05-09T02:11:23.000Z
diff --git a/amaranth/hdl/_ir.py b/amaranth/hdl/_ir.py
@@ -26,7 +26,7 @@ class Elaboratable(_unused.MustUse):
     _MustUse__warning = UnusedElaboratable
 
 
-class DriverConflict(UserWarning):
+class DriverConflict(Exception):
     pass
 
 
