2.14.0 alpha hangs after fg after ctrl-Z

i am running R version 2.14.0 alpha (2011-10-03 r57154) in an X11
terminal.  i build from source.
i often use ctrl-Z to pause the session and return to it via fg.  i
find that R hangs upon fg -- it does not
respond to ctrl-C and ctrl-\ takes some time to give a shell back.
Problem is not present in my
linux build of r57208.

sessionInfo()

R version 2.14.0 alpha (2011-10-03 r57154)
Platform: x86_64-apple-darwin10.8.0/x86_64 (64-bit)

locale:
[1] en_US.US-ASCII/en_US.US-ASCII/en_US.US-ASCII/C/en_US.US-ASCII/en_US.US-ASCII

attached base packages:
[1] stats     graphics  grDevices datasets  utils     tools     methods
[8] base

other attached packages:
[1] BiocInstaller_1.1.28 weaver_1.19.2        codetools_0.2-8
[4] digest_0.5.1

On Oct 14, 2011, at 6:45 AM, Vincent Carey wrote:

i am running R version 2.14.0 alpha (2011-10-03 r57154) in an X11
terminal. ?i build from source.
i often use ctrl-Z to pause the session and return to it via fg. ?i
find that R hangs upon fg -- it does not
respond to ctrl-C and ctrl-\ takes some time to give a shell back.
Problem is not present in my
linux build of r57208.

I cannot replicate this with the CRAN build of R -- here R version 2.14.0 alpha (2011-10-10 r57211).
Assuming that your reproducible example is
R
<Ctrl><Z>
fg

It works just fine (both xterm and Terminal). So

a) can you, please, check the CRAN build of R and see if you see the same problem?

b) provide exact details about how you compiled R (configure flags) as well as all 3rd part libraries you used so we can try to reproduce it?

Cheers,
Simon

sessionInfo()

R version 2.14.0 alpha (2011-10-03 r57154)
Platform: x86_64-apple-darwin10.8.0/x86_64 (64-bit)

locale:
[1] en_US.US-ASCII/en_US.US-ASCII/en_US.US-ASCII/C/en_US.US-ASCII/en_US.US-ASCII

attached base packages:
[1] stats ? ? graphics ?grDevices datasets ?utils ? ? tools ? ? methods
[8] base

other attached packages:
[1] BiocInstaller_1.1.28 weaver_1.19.2 ? ? ? ?codetools_0.2-8
[4] digest_0.5.1