On 03/13/2017 01:18 AM, Markus Armbruster wrote:
> Common Python pitfall: 'assert base_members' fires on [] in addition
> to None.  Correct to 'assert base_members is not None'.
> 
> Signed-off-by: Markus Armbruster <arm...@redhat.com>
> ---
>  scripts/qapi.py                        |  2 +-
>  tests/qapi-schema/union-base-empty.err | 11 +----------
>  2 files changed, 2 insertions(+), 11 deletions(-)
> 

> +++ b/tests/qapi-schema/union-base-empty.err
> @@ -1,10 +1 @@
> -Traceback (most recent call last):
> -  File "tests/qapi-schema/test-qapi.py", line 56, in <module>
> -    schema = QAPISchema(sys.argv[1])
> -  File "scripts/qapi.py", line 1483, in __init__
> -    self.exprs = check_exprs(parser.exprs)
> -  File "scripts/qapi.py", line 917, in check_exprs
> -    check_union(expr, info)
> -  File "scripts/qapi.py", line 734, in check_union
> -    assert base_members
> -AssertionError
> +tests/qapi-schema/union-base-empty.json:5: Discriminator 'type' is not a 
> member of base struct 'Empty'

Much nicer message.
Reviewed-by: Eric Blake <ebl...@redhat.com>

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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