[R-SIG-Mac] Rmpfr crashes on Mac

[Dev Chakraborty]

I used package Rmpfr ca. 2017 and it worked fine. The latest version
(0.8-7) causes R (running under RStudio) to crash. A simple example is:

library(Rmpfr)
x1 <- mpfr(-50, 200)
x2 <- mpfr(-50.1, 200)

Which gives the message:

R Session Aborted
R encountered a fatal error
The session was terminated
Start New Session

I am using R version 4.1.1 on a Mac running MacOS 12.0.1. and an older iMac
running 10.15.7. The problem occurs with both machines.

When I install from the CRAN archive file  Rmpfr_0.6-1.tar.gz (the version
of the package around 2017, corresponding to the last time I used it) the
problem goes away.

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