bug[next]: Improve error message on invalid call to field operator and program

src/gt4py/next/ffront/decorator.py

@@ -32,7 +32,7 @@
 from gt4py._core import definitions as core_defs
 from gt4py.eve import utils as eve_utils
 from gt4py.eve.extended_typing import Any, Optional
-from gt4py.next import allocators as next_allocators, embedded as next_embedded
+from gt4py.next import allocators as next_allocators, embedded as next_embedded, errors
 from gt4py.next.common import Dimension, DimensionKind, GridType
 from gt4py.next.embedded import operators as embedded_operators
 from gt4py.next.ffront import (
@@ -344,7 +344,9 @@ def _validate_args(self, *args, **kwargs) -> None:
                 raise_exception=True,
             )
         except ValueError as err:
-            raise TypeError(f"Invalid argument types in call to '{self.past_node.id}'.") from err
+            raise errors.DSLError(
+                None, f"Invalid argument types in call to '{self.past_node.id}'.\n{err}"
+            ) from err
 
     def _process_args(self, args: tuple, kwargs: dict) -> tuple[tuple, tuple, dict[str, Any]]:
         self._validate_args(*args, **kwargs)

src/gt4py/next/ffront/foast_passes/type_deduction.py

@@ -694,7 +694,7 @@ def visit_Call(self, node: foast.Call, **kwargs) -> foast.Call:
             )
         except ValueError as err:
             raise errors.DSLError(
-                node.location, f"Invalid argument types in call to '{new_func}'."
+                node.location, f"Invalid argument types in call to '{new_func}'.\n{err}"
             ) from err
 
         return_type = type_info.return_type(func_type, with_args=arg_types, with_kwargs=kwarg_types)

src/gt4py/next/ffront/past_passes/type_deduction.py

@@ -229,7 +229,7 @@ def visit_Call(self, node: past.Call, **kwargs):
                 )
 
         except ValueError as ex:
-            raise errors.DSLError(node.location, f"Invalid call to '{node.func.id}'.") from ex
+            raise errors.DSLError(node.location, f"Invalid call to '{node.func.id}'.\n{ex}") from ex
 
         return past.Call(
             func=new_func,

tests/next_tests/integration_tests/feature_tests/ffront_tests/test_program.py

@@ -20,6 +20,7 @@
 import pytest
 
 import gt4py.next as gtx
+from gt4py.next import errors
 
 from next_tests.integration_tests import cases
 from next_tests.integration_tests.cases import IDim, Ioff, JDim, cartesian_case, fieldview_backend
@@ -222,7 +223,7 @@ def test_wrong_argument_type(cartesian_case, copy_program_def):
     inp = cartesian_case.as_field([JDim], np.ones((cartesian_case.default_sizes[JDim],)))
     out = cases.allocate(cartesian_case, copy_program, "out").strategy(cases.ConstInitializer(1))()
 
-    with pytest.raises(TypeError) as exc_info:
+    with pytest.raises(errors.DSLError) as exc_info:
         # program is defined on Field[[IDim], ...], but we call with
         #  Field[[JDim], ...]
         copy_program(inp, out, offset_provider={})