Suppress hashing error when parsing annotated types

Author: jcrist

msgspec/_core.c

@@ -4621,11 +4621,15 @@ typenode_origin_args_metadata(
          * abstract -> concrete mapping. If present, this is an unparametrized
          * collection of some form. This helps avoid compatibility issues in
          * Python 3.8, where unparametrized collections still have __args__. */
-        origin = PyDict_GetItem(state->mod->concrete_types, t);
+        origin = PyDict_GetItemWithError(state->mod->concrete_types, t);
         if (origin != NULL) {
             Py_INCREF(origin);
             break;
         }
+        else {
+            /* Ignore all errors in this initial check */
+            PyErr_Clear();
+        }
 
         /* If `t` is a type instance, no need to inspect further */
         if (PyType_CheckExact(t)) {

setup.cfg

@@ -12,6 +12,8 @@ omit =
 markers =
     mypy
     pyright
+filterwarnings =
+    error
 
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