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fb072e1721
AsyncReadBuffer()'s no-IO needed path passed TRACE_POSTGRESQL_BUFFER_READ_DONE the wrong block number because it had already incremented operation->nblocks_done. Fix by folding the nblocks_done offset into the blocknum local variable at initialization. Author: Melanie Plageman <melanieplageman@gmail.com> Reviewed-by: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/u73un3xeljr4fiidzwi4ikcr6vm7oqugn4fo5vqpstjio6anl2%40hph6fvdiiria Backpatch-through: 18