Fwiw it looks like the LLVM folk think this is an asan bug. https://llvm.org/bugs/show_bug.cgi?id=25550
It looks like the fix is that the compiler should avoid this optimization if the code is being compiled with instrumentation. This worries me a bit but I think our code is safe as the Datum will always be either palloced which will be fully aligned and therefore can't overrun a page or on a stack in which case the whole struct will be allocated regardless of how many digits we need. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
