I don't know how to collect meaningful debug output from a crashing startplasmacompositor... :/

Actually, come to think of it, it's kwin_wayland that's dying, I suppose.

Not that this helps me or you devs, much. :(

Narrowed it down to XWayland.

Seems like it doesn't like that order swap...

Since this commit fixed failing dEQP and Piglit tests I'm assuming there is something wrong in either kwin or XWayland. Perhaps with this commit it starts to actually utilize EGL_EXT_device_{base,enumeration,query} but fails.

Hmmm.

I'll post this on the KDE side and see what they think.

On a whim, I tried to start Sway, but XWayland also fails to start...

Mesa commit in question:

https://gitlab.freedesktop.org/mesa/mesa/commit/68dc591af16ebb36814e4c187e4998948103c99c

Adding Lyude, who wrote the Xwayland code using eglQueryDevicesEXT and eglQueryDeviceStringEXT.

Puh, I think that is because of the binary search implementation being the same
locale dependent than the sort that got fixed yesterday. The strcmp function used as bsearch compare uses the locale.
I will take care for a patch.

Mathias

According to the man page bsearch doesn't care about the locale.

If some implementation of the C runtime does depend on it, I'm leaning towards open-coding the bsearch. It's the same amount of code.

Ok, strcmp does not use the locale. It would have been strcoll.
So forget about my comment.

... means needs deeper investigation.

Mathias

diff --git a/src/egl/egl-entrypoint-check b/src/egl/egl-entrypoint-check
index d6a42722a44..c7f3933a29b 100755
--- a/src/egl/egl-entrypoint-check
+++ b/src/egl/egl-entrypoint-check
@@ -7,5 +7,5 @@ then
 fi
 
 entrypoints=$(grep EGL_ENTRYPOINT "$srcdir"/main/eglentrypoint.h)
-sorted=$(LC_ALL=C sort <<< "$entrypoints")
+sorted=$(LC_ALL="" sort <<< "$entrypoints")
 test "$entrypoints" = "$sorted"

Neither of locale, bsearch or strcmp has anything to do here.
I'm working on fix and will send it out in a bit.

Kyle can you try the following. There should be copy of it in your inbox.

https://patchwork.freedesktop.org/patch/260080/

(In reply to Emil Velikov from comment #13)
> Kyle can you try the following. There should be copy of it in your inbox.
> 
> https://patchwork.freedesktop.org/patch/260080/

Can confirm that this patch worked for me.

Thanks for the report and check everyone. I've reproduced a crash locally where this fixes it. Kyle feel free to reopen the problem persists with the below commit.

commit b3ade6538798ad9bf397d8b386eab3dd8af57f3d
Author: Emil Velikov <emil.velikov@collabora.com>
Date:   Fri Nov 2 18:34:19 2018 +0000

    egl/glvnd: correctly report errors when vendor cannot be found