From luke-tierney at uiowa.edu  Fri Feb 10 20:00:17 2017
From: luke-tierney at uiowa.edu (luke-tierney at uiowa.edu)
Date: Fri, 10 Feb 2017 13:00:17 -0600 (CST)
Subject: [Rd] Pressing either Ctrl-\ of Ctrl-4 core dumps R
In-Reply-To: <CAFDcVCR+SrkrVw8UBaUYrYdDjHOMJK-1tywkONLN5nRG2uVLeQ@mail.gmail.com>
References: <CAFDcVCR+SrkrVw8UBaUYrYdDjHOMJK-1tywkONLN5nRG2uVLeQ@mail.gmail.com>
Message-ID: <alpine.LFD.2.20.1702101251520.6718@itasca.stat.uiowa.edu>

So do a number of other interactive programs when working in a
terminal (e.g. python) since it looks like your terminal is configured
for those two actions to send the SIGQUIT signal. Whether R should
ignore that signal, under some circumstances at least, is another
question.

Best,

luke

On Fri, 10 Feb 2017, Henrik Bengtsson wrote:

> When running R from the terminal on Linux (Ubuntu 16.04), it core
> dumps whenever / wherever I press Ctrl-4 or Ctrl-\.  You get thrown
> back to the terminal with "Quit (core dump)" being the only message.
> Grepping the R source code, it doesn't look like that message is
> generated by R itself.  Over on Twitter, it has been confirmed to also
> happen on macOS.
>
> $ R -d valgrind --vanilla --quiet
> ==979== Memcheck, a memory error detector
> ==979== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
> ==979== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info
> ==979== Command: /usr/lib/R/bin/exec/R --vanilla --quiet
> ==979==
>> 1+2
> [1] 3
>
> # At next prompt I press Ctrl-\. The same happens also when done in
> the middle of an entry.
>
>> ==979==
> ==979== Process terminating with default action of signal 3 (SIGQUIT)
> ==979==    at 0x576C9C3: __select_nocancel (syscall-template.S:84)
> ==979==    by 0x502EABE: R_SelectEx (in /usr/lib/R/lib/libR.so)
> ==979==    by 0x502EDDF: R_checkActivityEx (in /usr/lib/R/lib/libR.so)
> ==979==    by 0x502F32B: ??? (in /usr/lib/R/lib/libR.so)
> ==979==    by 0x4F6988B: Rf_ReplIteration (in /usr/lib/R/lib/libR.so)
> ==979==    by 0x4F69CF0: ??? (in /usr/lib/R/lib/libR.so)
> ==979==    by 0x4F69DA7: run_Rmainloop (in /usr/lib/R/lib/libR.so)
> ==979==    by 0x4007CA: main (in /usr/lib/R/bin/exec/R)
> ==979==
> ==979== HEAP SUMMARY:
> ==979==     in use at exit: 28,981,596 bytes in 13,313 blocks
> ==979==   total heap usage: 27,002 allocs, 13,689 frees, 49,025,684
> bytes allocated
> ==979==
> ==979== LEAK SUMMARY:
> ==979==    definitely lost: 0 bytes in 0 blocks
> ==979==    indirectly lost: 0 bytes in 0 blocks
> ==979==      possibly lost: 0 bytes in 0 blocks
> ==979==    still reachable: 28,981,596 bytes in 13,313 blocks
> ==979==         suppressed: 0 bytes in 0 blocks
> ==979== Rerun with --leak-check=full to see details of leaked memory
> ==979==
> ==979== For counts of detected and suppressed errors, rerun with: -v
> ==979== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
> Quit (core dumped)
>
> $ R --version
> R version 3.3.2 (2016-10-31) -- "Sincere Pumpkin Patch"
> Copyright (C) 2016 The R Foundation for Statistical Computing
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> /Henrik
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>

-- 
Luke Tierney
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
241 Schaeffer Hall                  email:   luke-tierney at uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu



[Rd] Pressing either Ctrl-\ of Ctrl-4 core dumps R
luke-tierney at uiowa.edu