[Bioc-devel] Latest R-devel revision breaks flowCore and other flow packages

The bug has existed forever. The commit log may be confusing. The
actual bug (or at least a very undesirable behavior) was in
match.call(), not callNextMethod().

I think it's still true that callNextMethod() is the natural
invocation. When adding arguments to initialize that you do not want
to pass on (and thus set as slots), it's necessary to use explicit
args. There are other cases where callNextMethod() is exactly what you
want. Like the case in rtracklayer that motivated this fix.


On Fri, Jan 23, 2015 at 11:23 AM, Mike <wjiang2 at fhcrc.org> wrote:

Michael,

Thanks for the confirmation of the issue. I see you were trying to tackle it
in the latest commits r67467:67472 which apparently haven?t fixed the bug
yet (instead it triggers the error of the existing legacy code in other R
packages like flowCore). I can certainly change the code to explicitly pass
on all the arguments to callNextMethod as you and Martin suggested. I just
wonder if the documentation should drop the sentence of Calling with no
arguments is often the natural way to use callNextMethod and change the
example code (at least before the bug is eventually fixed.) so that users
won?t be misusing it.



Mike

On 01/23/2015 10:55 AM, Martin Morgan wrote:

On 01/23/2015 10:52 AM, Michael Lawrence wrote:

First let me apologize for my failure to read emails. There was a
long-standing bug in the methods package where arguments passed as
"..." to a method would be dropped by callNextMethod(). It turns out
that in all known cases this affects calls to initialize(), probably
because there are many initialize() methods, and new() calls
initialize with "...".

This case is a very typical one, and Martin's fix is the right one,
according to the (unchanged) documentation of callNextMethod().

It's in general impossible to detect these cases from static analysis,
since we do not know how the user is calling a method. But catching
them in initialize() should be easy, with some false positives. Just
look for callNextMethod().

Is it OK for me to checkout all of Bioconductor so that I can perform
that analysis, or will that stress the servers too much? I have a
package that embeds GNU Global to index and search
CRAN/Bioconductor-size repositories for these cases.


Hi Michael -- there is no problem checking out all
(https://hedgehog.fhcrc.org/bioconductor/trunk/madman/Rpacks presumably) of
Bioc.

Thanks! Martin


Michael

On Thu, Jan 22, 2015 at 6:15 AM, Martin Morgan <mtmorgan at fredhutch.org>
wrote:

On 01/22/2015 12:26 AM, Martin Maechler wrote:


Mike  <wjiang2 at fhcrc.org>
       on Tue, 20 Jan 2015 17:16:37 -0800 writes:

       > I don't think it has been addressed yet in the later commits of

R-devel.

       > And that piece of code in flowCore package was written long time

ago and

       > there is nothing wrong with it as far as I can see.

You are right.

I thought Michael Lawrence (member of R Core since last summer!)
was also reading Bioc-devel, so wonder why he has not yet
replied --> CC'ing him

The changes to R-devel also did break the Matrix package in
exactly the same way.  You said

Here is the |initialize|method for |parameterFilter| which causes the
various errors from flow package vignettes.

|setMethod("initialize",
              signature=signature(.Object="parameterFilter"),
              definition=function(.Object, parameters,...)
              {
                if  (!missing(parameters))
                  parameters(.Object) <- parameters
                callNextMethod()
              })
|



and I also had  a  _no argument_ call
         callNextMethod()
inside an  initialize method.

I'm pretty sure that if you change (the same as I)

              callNextMethod()
to
              callNextMethod(.Object, ...)

you'll have a version of the code that works both in current R 3.1.2
(and older versions)  *and* in the R-devel version.


I also pinged Michael??

What's a precise statement of the problem -- no-argument callNextMethod()
inside initialize? Any suggestions on ways to discover these without relying
on package break during build / check / install?

Martin Morgan

Michael L and I were not sure how many other packages or R code this
would influence and he was expecting very very few.

Best regards,

Martin Maechler, ETH Zurich

       > On 01/20/2015 05:06 PM, Dan Tenenbaum wrote:

       >> I'm not sure if you were implying that this has already been fixed

in R-devel. Note that the devel build machines currently have r67501
installed, which is later than all the commits you cite above, yet the flow
packages are still broken.