Fix use-after-release issue with pg_identify_object_as_address()

Spotted by buildfarm member prion, with -DRELCACHE_FORCE_RELEASE.

Introduced in f7aab36.

Discussion: https://postgr.es/m/2759018.1619577848@sss.pgh.pa.us
Backpatch-through: 9.6

diff --git a/src/backend/catalog/objectaddress.c b/src/backend/catalog/objectaddress.c
index f9a8270f9592372e260b1a53972c90a7f3396f62..f5ab72de9df1916697a4356f0652850a664b0348 100644 (file)
--- a/src/backend/catalog/objectaddress.c
+++ b/src/backend/catalog/objectaddress.c
@@ -4681,7 +4681,7 @@ getObjectIdentityParts(const ObjectAddress *object,
                                        elog(ERROR, "cache lookup failed for event trigger %u",
                                                 object->objectId);
                                trigForm = (Form_pg_event_trigger) GETSTRUCT(tup);
-                               evtname = NameStr(trigForm->evtname);
+                               evtname = pstrdup(NameStr(trigForm->evtname));
                                appendStringInfoString(&buffer, quote_identifier(evtname));
                                if (objname)
                                        *objname = list_make1(evtname);