Re: DETOASTing in custom memory context

From whitin an aggregate sfunc I did:
oldcontext = MemoryContextSwitchTo(fcinfo->flinfo->fn_mcxt);
geom = (GEOMETRY *)PG_DETOAST_DATUM(datum);
MemoryContextSwitchTo(oldcontext);

And later in aggregate's finalfunc:
pfree(geom);

Result:
segfault!

What's wrong with it ?

NOTE that if I MemoryContextAllocate in fcinfo->flinfo->fn_mcxt and
memcopy DETOASTED geom, everything works (ar at least it seems to)

--strk;

strk wrote:
> Tom, thanks again for the quick answer and
> sorry for the lame question about memor allocation.
>
> I hope this is acceptable:
> Is there a way to make PG_DETOAST_DATUM and friends allocate
> memory in a custom memory context ?
>
> Right now I'm DETOASTing, memcopying in a custom context
> and pfreeing the DETOASTed datum, I'd like to avoid one
> copy.
>
> TIA.
> --strk;
>
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