thoffman@zappa.sax.de
1999-Oct-30 11:33 UTC
modreg buggy: uninitialized variable in sinerp.f (PR#302)
I had some strange problems with modreg: sometimes functions
hang in an infinite loop, consuming 100% CPU time. Especially
when update()ing models (as in example(ppr)) with sm.method="gcv"
I found that if I repeated the call after I did interrupt the hang,
it ran to completion.
After some lengthy debugging I could track down this problem:
sinerp.f, line 22--24 read:
wjm3(1)=0d0
wjm3(2)=0d0
wjm3(1)=0d0
This leaves wjm3(3) uninitialized. So after changing these lines to
wjm3(1)=0d0
wjm3(2)=0d0
wjm3(3)=0d0
the bug was gone.
Thomas Hoffmann.
--please do not edit the information below--
Version:
platform = i386-pc-os2_emx
arch = i386
os = os2_emx
system = i386, os2_emx
status = Release
major = 0
minor = 65.1
year = 1999
month = October
day = 07
language = R
Search Path:
.GlobalEnv, Autoloads, package:base
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Prof Brian D Ripley
1999-Oct-30 18:00 UTC
modreg buggy: uninitialized variable in sinerp.f (PR#302)
On Sat, 30 Oct 1999 thoffman@zappa.sax.de wrote:> I had some strange problems with modreg: sometimes functions > hang in an infinite loop, consuming 100% CPU time. Especially > when update()ing models (as in example(ppr)) with sm.method="gcv" > I found that if I repeated the call after I did interrupt the hang, > it ran to completion. > > After some lengthy debugging I could track down this problem: > > sinerp.f, line 22--24 read: > > wjm3(1)=0d0 > wjm3(2)=0d0 > wjm3(1)=0d0 > > This leaves wjm3(3) uninitialized. So after changing these lines to > > wjm3(1)=0d0 > wjm3(2)=0d0 > wjm3(3)=0d0 > > the bug was gone.Thank you very much! We were aware of occasional problems (but only on gcc), but had not managed to track them down. In all cases using -ffloat-store had solved the problem. I have committed this change for the next release. -- Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._