On 30/05/2022, at 10:09 AM, Simon Urbanek <simon.urbanek at r-project.org> wrote:
John,
thanks, this is a regression caused by r78421 (deadlock when TclTk's event loop is called in http processing). Removing L875 in src/modules/internet/Rhttpd.c restores the previous behavior, but the underlying problem is more complex and will require more investigation.
Cheers,
Simon
On 29/05/2022, at 5:36 AM, John Fox <jfox at mcmaster.ca> wrote:
Dear R-sig-mac list members,
I've discovered that loading the tcltk package apparently causes R 4.2.0 (including the current patched version) to hang on an M1 Mac.
Try, e.g.,
library("tcltk")
help("lm")
My session info:
------- snip -------
R version 4.2.0 Patched (2022-05-28 r82413)
Platform: aarch64-apple-darwin20 (64-bit)
Running under: macOS Monterey 12.3.1
Matrix products: default
BLAS: /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/lib/libRblas.0.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/lib/libRlapack.dylib
locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] tcltk stats graphics grDevices utils datasets methods
[8] base
loaded via a namespace (and not attached):
[1] compiler_4.2.0
------- snip -------
Some additional details: The problem occurs both in the R macOS console and, if options(help_type="html"), when R is run in a terminal window on macOS, but not when options(help_type="text"). The former is the default in the Mac R console, the latter when R is run in a terminal.
The problem is apparently new in R 4.2.0 -- it doesn't, e.g., occur in R 4.1.3. My apologies for not turning it up earlier.
I discovered the problem when accessing help in the Rcmdr GUI, which uses tcltk, caused R to hang.
Has anyone else encountered this problem?
Best,
John
--
John Fox, Professor Emeritus
McMaster University
Hamilton, Ontario, Canada
web: https://socialsciences.mcmaster.ca/jfox/