dblib: avoid potential NULL dereference #693
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tds_alloc_context() may return NULL, and the returned value should be checked before being dereferenced. Found by PostgresPro Signed-off-by: Maksim Korotkov <m.korotkov@postgrespro.ru>
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tds_alloc_context() may return NULL, and the returned value should be checked before being dereferenced.
Found by PostgresPro