On 10/1/19 2:15 PM, Markus Armbruster wrote:
The frontend can't be run more than once due to its global state.
A future commit will want to do that.

The only global frontend state remaining is accidental:
QAPISchemaParser.__init__()'s parameter previously_included=[].
Python evaluates the default once, at definition time.  Any
modifications to it are visible in subsequent calls.  Well-known
Python trap.  Change the default to None and replace it by the real
default in the function body.  Use the opportunity to convert
previously_included to a set.

Signed-off-by: Markus Armbruster <arm...@redhat.com>
---
  scripts/qapi/common.py | 5 +++--
  1 file changed, 3 insertions(+), 2 deletions(-)


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

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3226
Virtualization:  qemu.org | libvirt.org

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