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Commit95eb4cd

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Avoid possible segfault in psql's tab completion.
Fix oversight inbd1276a: the "words_after_create" stanza inpsql_completion() requires previous_words_count > 0, since it usesprev_wd. This condition was formerly assured by the if-else chainabove it, but no more. If there were no previous words then we'ddereference an uninitialized pointer, possibly causing a segfault.Report and patch by Anthonin Bonnefoy.Discussion:https://postgr.es/m/CAO6_XqrSRE7c_i+D7Hm07K3+6S0jTAmMr60RY41XzaA29Ae5uA@mail.gmail.com
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‎src/bin/psql/tab-complete.in.c

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Original file line numberDiff line numberDiff line change
@@ -2024,7 +2024,7 @@ psql_completion(const char *text, int start, int end)
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* check if that was the previous word. If so, execute the query to get a
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* list of them.
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*/
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if (matches==NULL)
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if (matches==NULL&&previous_words_count>0)
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{
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constpgsql_thing_t*wac;
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