This patch incurs a compiler warning, which probably is quite simple to fix:
heapam.c: In function ‘heap_multi_insert’: heapam.c:2349:4: error: ‘recptr’ may be used uninitialized in this function [-Werror=maybe-uninitialized] visibilitymap_set(relation, BufferGetBlockNumber(buffer), buffer, ^ heapam.c:2136:14: note: ‘recptr’ was declared here XLogRecPtr recptr; ^ Please fix and submit a new version, I'm marking the entry Waiting on Author in the meantime. cheers ./daniel