The "pltargs" variable wasn't marked volatile, which makes it unsafe to change its value within the PG_TRY block. It looks like the worst outcome would be to fail to release a refcount on Py_None during an (improbable) error exit, which would likely go unnoticed in the field. Still, it's a bug. A one-liner fix could be to mark pltargs volatile, but on the whole it seems cleaner to arrange things so that we don't change its value within PG_TRY. Per report from Xing Guo. This has been there for quite awhile, so back-patch to all supported branches. Discussion: https://postgr.es/m/CACpMh+DLrk=fDv07MNpBT4J413fDAm+gmMXgi8cjPONE+jvzuw@mail.gmail.com |
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