use cast

Author: BobTheBuidler

mypyc/irbuild/specialize.py

@@ -14,7 +14,7 @@
 
 from __future__ import annotations
 
-from typing import Callable, Final, Optional
+from typing import Callable, Final, Optional, cast
 
 from mypy.nodes import (
     ARG_NAMED,
@@ -40,6 +40,7 @@
     Call,
     Extend,
     Integer,
+    PrimitiveDescription,
     RaiseStandardError,
     Register,
     Truncate,
@@ -641,7 +642,7 @@ def translate_isinstance(builder: IRBuilder, expr: CallExpr, callee: RefExpr) ->
             is_last = i == len(descs) - 1
             next_block = fail_block if is_last else BasicBlock()
             builder.add_bool_branch(
-                builder.primitive_op(desc, [obj], expr.line), pass_block, next_block  # type: ignore [arg-type]
+                builder.primitive_op(cast(PrimitiveDescription, desc), [obj], expr.line), pass_block, next_block
             )
             if not is_last:
                 builder.activate_block(next_block)