Fix minor memory leak in Standby startup

StandbyRecoverPreparedTransactions() leaked the buffer
used for two phase state file. This was leaked once
at startup and at every shutdown checkpoint seen.

Backpatch to 9.6

Stas Kelvich

diff --git a/src/backend/access/transam/twophase.c b/src/backend/access/transam/twophase.c
index 9f55adcaf5ef0e50fe1ea93e4e725c5c7b794215..1323fb508dc9585e8366dcc8f24ed8fe88fcee46 100644 (file)
--- a/src/backend/access/transam/twophase.c
+++ b/src/backend/access/transam/twophase.c
@@ -1886,6 +1886,8 @@ StandbyRecoverPreparedTransactions(bool overwriteOK)
                Assert(TransactionIdFollows(subxid, xid));
                SubTransSetParent(xid, subxid, overwriteOK);
            }
+
+           pfree(buf);
        }
    }
    FreeDir(cldir);