Bug#993750: rgtk2: FTBFS on s390x: smoke-test failure: caught segfault

On 6 September 2021 at 09:39, Simon McVittie wrote:
| On Sun, 05 Sep 2021 at 20:04:55 -0500, Dirk Eddelbuettel wrote:
| > Please explain what a smoke-test failure is.
| 
| Sorry, I thought this was a common term.
| 
| A smoke-test for hardware: plug in the device and see whether smoke
| comes out. If yes, reject it. If not, it *might* work as intended (but
| further testing would be needed to know that).
| 
| By analogy, a smoke-test for software: try to do something superficial
| with it, like loading it but not running any real tests. If that fails,
| reject it (as the R build system does here). If not, it might work
| (but further testing would be needed to know that).

Yes, that is exactly what is done (and for the very reason), we just had not
used _that term_ over here for it :-/ though I had seen it used. It is a fair
discriminator esp with shared library dependencies :)
 
| > A segfault here usually means /some/ API along
| > the way changed :-/ and is rare as a one-arch-only occurrence.
| 
| This happened on s390x buildds consistently across two builds of the
| +b2 binNMU, but I can't reproduce it on the s390x porterbox zelenka
| in either a sid or bullseye chroot, which is odd. I've given back the
| official buildd build to see whether it was something transient.

Ok.

| s390 porters: are there any important differences between the s390x
| porterbox and the s390x buildds, like a different CPU or something?
| 
| On the porterbox, I get the same output as on the non-s390x buildds:
| rgtk can't actually initialize because there's no X11 display, but
| doesn't crash either.

This is a fairly stable (upstream) package, it used to be considered big-ish
too as it has all the gtk2 bindings (generated as I recall).

Let me know if I can help. I do not think the package does anything special
on the platform.

Dirk

| > make[1]: Leaving directory '/home/smcv/rgtk2-2.20.36/src'
| > installing to /home/smcv/rgtk2-2.20.36/debian/r-cran-rgtk2/usr/lib/R/site-library/00LOCK-rgtk2-2.20.36/00new/RGtk2/libs
| > ** R
| > ** demo
| > ** inst
| > ** byte-compile and prepare package for lazy loading
| > ** help
| > *** installing help indices
| > ** building package indices
| > ** testing if installed package can be loaded from temporary location
| > R session is headless; GTK+ not initialized.
| > ** checking absolute paths in shared objects and dynamic libraries
| > ** testing if installed package can be loaded from final location
| > R session is headless; GTK+ not initialized.
| > ** testing if installed package keeps a record of temporary installation path
| > * DONE (RGtk2)
| 
|     smcv