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Defend against null error message reported by libxml2.

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While this isn't really supposed to happen, it can occur in OOM
situations and perhaps others.  Instead of crashing, substitute
"(no message provided)".

I didn't worry about localizing this text, since we aren't
localizing anything else here; besides, if we're on the edge of
OOM, it's unlikely gettext() would work.

Report and fix by Sergio Conde Gómez in bug #15624.

Discussion: https://postgr.es/m/15624-4dea54091a2864e6@postgresql.org
This commit is contained in:
Tom Lane 2019-02-08 13:30:42 -05:00
parent f10a20e147
commit 0edef16d76
1 changed files with 4 additions and 1 deletions
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5
src/backend/utils/adt/xml.c
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@ -1697,7 +1697,10 @@ xml_errorHandler(void *data, xmlErrorPtr error)
appendStringInfo(errorBuf, "line %d: ", error->line);
if (name != NULL)
appendStringInfo(errorBuf, "element %s: ", name);
appendStringInfoString(errorBuf, error->message);
if (error->message != NULL)
appendStringInfoString(errorBuf, error->message);
else
appendStringInfoString(errorBuf, "(no message provided)");
/*
* Append context information to errorBuf.