File libxml2-bug787941.patch of Package libxml2

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File libxml2-bug787941.patch of Package libxml2 (Revision 10a6607d3b7784e060715e11f5555a08)

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From 3157cf4e53c03bc3da604472c015c63141907db8 Mon Sep 17 00:00:00 2001
From: Nick Wellnhofer <wellnhofer@aevum.de>
Date: Wed, 20 Sep 2017 16:13:29 +0200
Subject: Report undefined XPath variable error message

Commit c851970 removed a redundant error message if XPath evaluation
failed. This uncovered a case where an undefined XPath variable error
wasn't reported correctly.

Thanks to Petr Pisar for the report.

Fixes bug 787941.
---
 xpath.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/xpath.c b/xpath.c
index 2c1b268..9481507 100644
--- a/xpath.c
+++ b/xpath.c
@@ -13531,10 +13531,8 @@ xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op)
                         xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]);
                 if (op->value5 == NULL) {
 		    val = xmlXPathVariableLookup(ctxt->context, op->value4);
-		    if (val == NULL) {
-			ctxt->error = XPATH_UNDEF_VARIABLE_ERROR;
-			return(0);
-		    }
+		    if (val == NULL)
+			XP_ERROR0(XPATH_UNDEF_VARIABLE_ERROR);
                     valuePush(ctxt, val);
 		} else {
                     const xmlChar *URI;
@@ -13549,10 +13547,8 @@ xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op)
                     }
 		    val = xmlXPathVariableLookupNS(ctxt->context,
                                                        op->value4, URI);
-		    if (val == NULL) {
-			ctxt->error = XPATH_UNDEF_VARIABLE_ERROR;
-			return(0);
-		    }
+		    if (val == NULL)
+			XP_ERROR0(XPATH_UNDEF_VARIABLE_ERROR);
                     valuePush(ctxt, val);
                 }
                 return (total);
-- 
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File libxml2-bug787941.patch of Package libxml2 (Revision 10a6607d3b7784e060715e11f5555a08)

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