[ESS] R-Markdown Locks up in Polymode/ESS

[Laurent Gatto]

Dear Bill,

I think I am experiencing the same problem here; I have this recurring
issue with emacs, that has become serious since I updated all my
package. When I edit an Rmarkdown file emacs randomly freezes and the
emacs process takes up 100% of the CPU.

As far as I can remember, this happens when I'm editing code chunks. I
am not really sure what happens or what package is the problem. I just
observed that this still happens when I don't load markdown-mode.

I strace'd the emacs process after a freeze - here is a short
representative extract.

poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}], 2, 0) = 0 (Timeout)
recvmsg(4, 0x7fffe86bc3a0, 0)           = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}], 2, 0) = 0 (Timeout)
--- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} ---
rt_sigreturn()                          = 195
recvmsg(4, {msg_name(0)=NULL, msg_iov(1)=[{"\6\0\236\306\316H\340\0\235\0\0\0\302\0@\1\0\0\0\0\306\4o\3 \3\26\3\0\0\1\0", 4096}], msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(4, 0x7fffe86bc6f0, 0)           = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}], 2, 0) = 0 (Timeout)
poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}], 2, 0) = 0 (Timeout)
recvmsg(4, 0x7fffe86bc6f0, 0)           = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=5, events=POLLIN}, {fd=4, events=POLLIN}], 2, 0) = 0 (Timeout)
--- SIGIO {si_signo=SIGIO, si_code=SI_KERNEL} ---
rt_sigreturn()                          = 10986603

I have observed this recvmsg and timeouts/Resources temporarily
unavailable several times in such situations, but I can't make any sense
of this.

Here are the respective versions

  markdown-mode 20160113.816
  polymode 20151216.533
  ess-version: 15.09-2 patched [elpa: 20160110.2313]
  GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.23) of 2015-07-27

Not of much help, but hopefully someone else will be able provide some.

Best wishes,

Laurent

On 18 January 2016 16:43, Bill Denney wrote:

> Hi,
>
>  
>
> I've just started taking advantage of the benefits of polymode and ESS
> combined for r-markdown documents having previously manually coded them.
> I'm using them to make a vignette for the PKNCA package, and when I scroll
> through the .Rmd file, emacs locks up when leaving the first code block
> after I make an edit in the block.  It fully locks up, and I can't switch to
> the messages buffer in emacs to see the reason for the hang.
>
>  
>
> Here are the steps to reproduce the error as I'm using it.
>
>  
>
> Windows 10 (up to date)
>
> Emacs version: GNU Emacs 24.5.1 (i686-pc-mingw32) of 2015-04-11
>
> ESS version: ess-version: 15.09-2 [Released git: 01328e83039f]
>
> Polymode installed via MELPA yesterday: version 20151216.533 as described by
> MELPA
>
> Markdown-mode installed via MELPA yesterday: version 20160115.2318 as
> described by MELPA
>
>  
>
> 1.      Load the file in emacs
>
> 2.      Scroll down to the first code block (see below my signature for the
> snippet)
>
> 3.      Change "addlastrow" to "setpredose" (I have no R buffers open)
>
> 4.      Scroll out of the code block
>
>  
>
> As I do step 4, it locks up.  This is unfortunately not fully reproducible,
> and I can't figure out the specific trigger that changes it from working
> normally to hanging.  With previous experience, it looks similar to an
> attempted function argument lookup hang, but that is mostly a guess.
>
>  
>
> Any thoughts to what this could be or ways that I could improve the bug
> report with better tracking of how it hangs?
>
>  
>
> Thanks,
>
>  
>
> Bill
>
>  
>
> File snippet:
>
>  
>
> Two examples are given below.
>
>  
>
> ```{r eval=FALSE}
>
> list(operation="add",
>
>      FUN=addlastrow)
>
> ```
>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> ESS-help using r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/ess-help