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It turns out the LIBXML_TEST_VERSION macro calls xmlInitParser().

Therefore we must xmlCleanupParser(), or we risk leaving behinddangling pointers to whatever memory context is current when xml_init()is called. This seems to fix bug #3860, though we might still wantthe more invasive solution being worked on by Alvaro.

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src/backend/utils/adt
- xml.c

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`‎src/backend/utils/adt/xml.c‎`

Lines changed: 4 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -7,7 +7,7 @@`
`7`	`7`	`* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group`
`8`	`8`	`* Portions Copyright (c) 1994, Regents of the University of California`
`9`	`9`	`*`
`10`		`- * $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.66 2008/01/1210:50:03 neilc Exp $`
	`10`	`+ * $PostgreSQL: pgsql/src/backend/utils/adt/xml.c,v 1.67 2008/01/1221:14:08 tgl Exp $`
`11`	`11`	`*`
`12`	`12`	`*-------------------------------------------------------------------------`
`13`	`13`	`*/`
`@@ -958,6 +958,9 @@ xml_init(void)`
`958`	`958`	`/* Check library compatibility */`
`959`	`959`	`LIBXML_TEST_VERSION;`
`960`	`960`
	`961`	`+/* The above calls xmlInitParser(); must clean up dangling pointers */`
	`962`	`+xmlCleanupParser();`
	`963`	`+`
`961`	`964`	`first_time= false;`
`962`	`965`	`}`
`963`	`966`	`else`

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Commit1bbf870

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`‎src/backend/utils/adt/xml.c‎`

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