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Commitcf1c650

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Limit to_tsvector_byid's initial array allocation to something sane.
The initial estimate of the number of distinct ParsedWords is justthat: an estimate. Don't let it exceed what palloc is willing toallocate. If in fact we need more entries, we'll eventually failtrying to enlarge the array. But if we don't, this allows success oninputs that currently draw "invalid memory alloc request size".Per bug #18080 from Uwe Binder. Back-patch to all supported branches.Discussion:https://postgr.es/m/18080-d5c5e58fef8c99b7@postgresql.org
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‎src/backend/tsearch/to_tsany.c

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@@ -252,6 +252,8 @@ to_tsvector_byid(PG_FUNCTION_ARGS)
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* number */
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if (prs.lenwords<2)
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prs.lenwords=2;
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elseif (prs.lenwords>MaxAllocSize /sizeof(ParsedWord))
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prs.lenwords=MaxAllocSize /sizeof(ParsedWord);
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prs.curwords=0;
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prs.pos=0;
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prs.words= (ParsedWord*)palloc(sizeof(ParsedWord)*prs.lenwords);

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