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pg_get_indexdef_worker carelessly fetched indoption entries even for non-key index columns that don't have one. 99.999% of the time this would be harmless, since the code wouldn't examine the value ... but some fine day this will be a fetch off the end of memory, resulting in SIGSEGV. Detected through valgrind testing. Odd that the buildfarm's valgrind critters haven't noticed.