Fix matrix free failing tests

firedrakeproject · Mar 18, 2021 · 3a8c877 · 3a8c877
1 parent 6029b56
commit 3a8c877
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/firedrake/assemble.py b/firedrake/assemble.py
@@ -113,7 +113,7 @@ def assemble_form(expr, tensor=None, bcs=None, *,
                   form_compiler_parameters=None,
                   mat_type=None,
                   sub_mat_type=None,
-                  appctx=None,
+                  appctx={},
                   options_prefix=None,
                   nest=None):
     """Assemble an expression.