add test + catch all exceptions

yt/fields/field_info_container.py

@@ -1,9 +1,7 @@
 from numbers import Number as numeric_type
 
 import numpy as np
-from unyt.exceptions import UnitConversionError
 
-from yt.fields.field_exceptions import NeedsConfiguration
 from yt.funcs import issue_deprecation_warning, mylog, only_on_root
 from yt.geometry.geometry_handler import is_curvilinear
 from yt.units.dimensions import dimensionless
@@ -473,7 +471,7 @@ def check_derived_fields(self, fields_to_check=None):
             try:
                 # fd: field detector
                 fd = fi.get_dependencies(ds=self.ds)
-            except (YTFieldNotFound, NeedsConfiguration, UnitConversionError) as e:
+            except Exception as e:
                 if field in self._show_field_errors:
                     raise
                 if not isinstance(e, YTFieldNotFound):

yt/fields/tests/test_field_name_container.py

@@ -1,5 +1,5 @@
 from yt import load
-from yt.testing import fake_amr_ds, requires_file
+from yt.testing import fake_amr_ds, fake_hexahedral_ds, requires_file
 
 
 def do_field_type(ft):
@@ -33,7 +33,25 @@ def test_field_name_container():
         do_field_type(field_type)
 
 
-def test_no_vertex_fields_in_structured_ds():
+def test_vertex_fields_only_in_unstructured_ds():
+    def get_vertex_fields(ds):
+        return [(ft, fn) for ft, fn in ds.derived_field_list if "vertex" in fn]
+
     ds = fake_amr_ds()
-    vertex_fields = [(ft, fn) for ft, fn in ds.derived_field_list if "vertex" in fn]
+    vertex_fields = get_vertex_fields(ds)
     assert not vertex_fields
+
+    ds = fake_hexahedral_ds()
+    actual = get_vertex_fields(ds)
+    expected = [
+        ("all", "vertex_x"),
+        ("all", "vertex_y"),
+        ("all", "vertex_z"),
+        ("connect1", "vertex_x"),
+        ("connect1", "vertex_y"),
+        ("connect1", "vertex_z"),
+        ("index", "vertex_x"),
+        ("index", "vertex_y"),
+        ("index", "vertex_z"),
+    ]
+    assert actual == expected