[Rd] [External] Re: Operations with long altrep vectors cause segfaults on Windows

[Hugh Parsonage]

I can confirm the segmentation fault does not occur as of r79170.

On Wed, 9 Sep 2020 at 19:06, Tomas Kalibera <tomas.kalibera using gmail.com> wrote:
>
> On 9/8/20 11:47 PM, Jeroen Ooms wrote:
> > On Tue, Sep 8, 2020 at 11:44 PM Jeroen Ooms <jeroenooms using gmail.com> wrote:
> >> On Tue, Sep 8, 2020 at 5:20 PM Tomas Kalibera <tomas.kalibera using gmail.com> wrote:
> >>> On 9/8/20 4:48 PM, Hugh Parsonage wrote:
> >>>> Unfortunately I only get
> >>>>
> >>>> [Thread 21752.0x4aa8 exited with code 3221225477]
> >>>> [Thread 21752.0x4514 exited with code 3221225477]
> >>>> [Thread 21752.0x3f10 exited with code 3221225477]
> >>>> [Inferior 1 (process 21752) exited with code 030000000005]
> >>>>
> >>>> (I'm guessing I would need to build an instrumented version of R, or
> >>>> can R be debugged using gdb with an off-the-shelf installation?)
> >>> No, the default build lacks debug symbols. You need a build with debug
> >>> symbols, and if you can reproduce in a build without compiler
> >>> optimizations (-O0), the backtrace may be easier to interpret. Some bugs
> >>> however "disappear" when optimizations are disabled. You can build R
> >>> from source (and there may be debug builds provided by someone else
> >>> (Jeroen?)).
> >> Debug builds for each revision are available from
> >> https://r-devel.github.io . To download the installer you need to
> >> click the github icon in the last column in the table. You need to be
> >> signed in with a (free) Github account in order to download builds
> >> (artifacts) from Github actions. It will show download links for both
> >> the regular installer and installer with debug symbols.
> >>
> >> In other news, the https://r-devel.github.io table also shows that the
> >> fix that martin committed is segfaulting on 32-bit.
> > Sorry that was inaccurate, it is not segfaulting at all, but the unit
> > test is raising an error on 32-bit.
>
> Now fixed, the test needs to be run only on 64-bit builds where such
> long vectors/sequences are allowed.
>
> Tomas
>