[External] Re: Operations with long altrep vectors cause segfaults on Windows
On Tue, Sep 8, 2020 at 11:44 PM Jeroen Ooms <jeroenooms at gmail.com> wrote:
On Tue, Sep 8, 2020 at 5:20 PM Tomas Kalibera <tomas.kalibera at 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.