Commite0070a6

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Fix use of free in walsender error handling after a sysid mismatch.

Found via valgrind. The bug exists since the introduction of the walsender,so backpatch to 9.0.Andres Freund

1 parentfb66e88 commite0070a6Copy full SHA for e0070a6

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Original file line number	Diff line number	Diff line change
`@@ -135,6 +135,7 @@ libpqrcv_connect(char *conninfo, XLogRecPtr startpoint)`
`135`	`135`	`GetSystemIdentifier());`
`136`	`136`	`if (strcmp(primary_sysid,standby_sysid)!=0)`
`137`	`137`	`{`
	`138`	`+primary_sysid=pstrdup(primary_sysid);`
`138`	`139`	`PQclear(res);`
`139`	`140`	`ereport(ERROR,`
`140`	`141`	`(errmsg("database system identifier differs between the primary and standby"),`

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