8 files changed, 13 insertions, 14 deletions
diff --git a/scripts/qapi.py b/scripts/qapi.py
index 8d2681b24b..c0728d73e1 100644
--- a/scripts/qapi.py
+++ b/scripts/qapi.py
@@ -560,15 +560,14 @@ def check_union(expr, expr_info):
     # Else, it's a flat union.
     else:
         # The object must have a string member 'base'.
-        if not isinstance(base, str):
+        check_type(expr_info, "'base' for union '%s'" % name,
+                   base, allow_metas=['struct'])
+        if not base:
             raise QAPIExprError(expr_info,
-                                "Flat union '%s' must have a string base field"
+                                "Flat union '%s' must have a base"
                                 % name)
         base_fields = find_base_fields(base)
-        if not base_fields:
-            raise QAPIExprError(expr_info,
-                                "Base '%s' is not a valid struct"
-                                % base)
+        assert base_fields
 
         # The value of member 'discriminator' must name a non-optional
         # member of the base struct.
diff --git a/tests/qapi-schema/flat-union-bad-base.err b/tests/qapi-schema/flat-union-bad-base.err
index f9c31b2bf5..79b8a71eb8 100644
--- a/tests/qapi-schema/flat-union-bad-base.err
+++ b/tests/qapi-schema/flat-union-bad-base.err
@@ -1 +1 @@
-tests/qapi-schema/flat-union-bad-base.json:9: Flat union 'TestUnion' must have a string base field
+tests/qapi-schema/flat-union-bad-base.json:9: 'base' for union 'TestUnion' should be a type name
diff --git a/tests/qapi-schema/flat-union-base-any.err b/tests/qapi-schema/flat-union-base-any.err
index ad4d629e75..646f1c9cd1 100644
--- a/tests/qapi-schema/flat-union-base-any.err
+++ b/tests/qapi-schema/flat-union-base-any.err
@@ -1 +1 @@
-tests/qapi-schema/flat-union-base-any.json:8: Base 'any' is not a valid struct
+tests/qapi-schema/flat-union-base-any.json:8: 'base' for union 'TestUnion' cannot use built-in type 'any'
diff --git a/tests/qapi-schema/flat-union-base-union.err b/tests/qapi-schema/flat-union-base-union.err
index 28725ed1e3..f138395e45 100644
--- a/tests/qapi-schema/flat-union-base-union.err
+++ b/tests/qapi-schema/flat-union-base-union.err
@@ -1 +1 @@
-tests/qapi-schema/flat-union-base-union.json:14: Base 'UnionBase' is not a valid struct
+tests/qapi-schema/flat-union-base-union.json:14: 'base' for union 'TestUnion' cannot use union type 'UnionBase'
diff --git a/tests/qapi-schema/flat-union-inline.err b/tests/qapi-schema/flat-union-inline.err
index ec586277b7..2333358d28 100644
--- a/tests/qapi-schema/flat-union-inline.err
+++ b/tests/qapi-schema/flat-union-inline.err
@@ -1 +1 @@
-tests/qapi-schema/flat-union-inline.json:7: Flat union 'TestUnion' must have a string base field
+tests/qapi-schema/flat-union-inline.json:7: Member 'value1' of union 'TestUnion' should be a type name
diff --git a/tests/qapi-schema/flat-union-inline.json b/tests/qapi-schema/flat-union-inline.json
index 6bfdd65811..62c7cda617 100644
--- a/tests/qapi-schema/flat-union-inline.json
+++ b/tests/qapi-schema/flat-union-inline.json
@@ -1,11 +1,11 @@
 # we require branches to be a struct name
-# TODO: should we allow anonymous inline types?
+# TODO: should we allow anonymous inline branch types?
 { 'enum': 'TestEnum',
   'data': [ 'value1', 'value2' ] }
 { 'struct': 'Base',
   'data': { 'enum1': 'TestEnum', 'kind': 'str' } }
 { 'union': 'TestUnion',
-  'base': { 'enum1': 'TestEnum', 'kind': 'str' },
+  'base': 'Base',
   'discriminator': 'enum1',
   'data': { 'value1': { 'string': 'str' },
             'value2': { 'integer': 'int' } } }
diff --git a/tests/qapi-schema/flat-union-no-base.err b/tests/qapi-schema/flat-union-no-base.err
index bb3f708747..841c93b554 100644
--- a/tests/qapi-schema/flat-union-no-base.err
+++ b/tests/qapi-schema/flat-union-no-base.err
@@ -1 +1 @@
-tests/qapi-schema/flat-union-no-base.json:9: Flat union 'TestUnion' must have a string base field
+tests/qapi-schema/flat-union-no-base.json:9: Flat union 'TestUnion' must have a base
diff --git a/tests/qapi-schema/union-invalid-base.err b/tests/qapi-schema/union-invalid-base.err
index 9f637963e8..03d7b97a93 100644
--- a/tests/qapi-schema/union-invalid-base.err
+++ b/tests/qapi-schema/union-invalid-base.err
@@ -1 +1 @@
-tests/qapi-schema/union-invalid-base.json:8: Base 'int' is not a valid struct
+tests/qapi-schema/union-invalid-base.json:8: 'base' for union 'TestUnion' cannot use built-in type 'int'