Fix Windows

Author: vstinner

Lib/test/libregrtest/runtests.py

@@ -70,7 +70,9 @@ class HuntRefleak:
     filename: StrPath
 
     def bisect_cmd_args(self) -> list[str]:
-        return ["-R", f"{self.warmups}:{self.runs}:{self.filename}"]
+        # Ignore filename since it can contain colon (":"),
+        # and usually it's not used. Use the default filename.
+        return ["-R", f"{self.warmups}:{self.runs}:"]
 
 
 @dataclasses.dataclass(slots=True, frozen=True)