Defer bound eval

Author: harahu

trio/_core/_run.py

@@ -51,7 +51,7 @@
 
 _NO_SEND: FinalT = object()
 
-FnT = TypeVar("FnT", bound=Callable[..., Any])
+FnT = TypeVar("FnT", bound="Callable[..., Any]")
 
 # Decorator to mark methods public. This does nothing by itself, but
 # trio/_tools/gen_exports.py looks for it.