NA propagation is complicated. I don't know whether what you observe could be explained by the difference between a valgrind instrumented vs. not version of R (I gather the release version you used is not instrumented / possibly compiled differently too from the github issue?).
Hopefully someone more knowledgeable would chime in, but I did want to share Tomas's post that touches on the complexity of NA_real_ propagation: https://developer.r-project.org/Blog/public/2020/11/02/will-r-work-on-apple-silicon/#nanan-payload-propagation Best, B. On Thursday, April 29, 2021, 6:04:38 PM EDT, Jonathan Keane <jke...@gmail.com> wrote: Hello, I'm debugging some valgrind issues, and noticed some odd behavior with NA an R-devel under valgrind. Using Winston Chang's r-debug image (and some of this reproductions form [1]): r-devel (2021-04-27 r80232) without Valgrind returns NA: # RD --quiet -e "sum(c(1, NA))" > sum(c(1, NA)) [1] NA r-devel with `-d valgrind` returns NaN: # RD -d valgrind --quiet -e "sum(c(1, NA))" ==8901== Memcheck, a memory error detector ==8901== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==8901== Using Valgrind-3.15.0 and LibVEX; rerun with -h for copyright info ==8901== Command: /usr/local/RD/lib/R/bin/exec/R --quiet -e sum(c(1,~+~NA)) ==8901== > sum(c(1, NA)) [1] NaN And finally release R (with valgrind) returns NA just like r-devel while not under Valgrind: # R -d valgrind --quiet -e "sum(c(1, NA))" ==8983== Memcheck, a memory error detector ==8983== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==8983== Using Valgrind-3.15.0 and LibVEX; rerun with -h for copyright info ==8983== Command: /usr/lib/R/bin/exec/R --quiet -e sum(c(1,~+~NA)) ==8983== > sum(c(1, NA)) [1] NA Thanks [1] - https://github.com/wch/r-debug/issues/18 -Jon ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
