Although in your Bugzillaa it is mentioned that bugs for Intel HD graphics should be reported to i965, my dmesg just shows i915, so I’ll report here. I own a Dell XPS 15 9550 and an “Intel® Core™ i7-6700HQ CPU @ 2.60GHz × 8” with “Intel® HD Graphics 530 (Skylake GT2) / NV117”. I use Fedora 27 with Wayland and have a mixed-dpi setup (UHD & HD screens). Mesa version is 17.2.4.

The bug is occurring by usage of the application Lollypop (via Flatpak), see my bug report there:
https://gitlab.gnome.org/gnumdk/lollypop/issues/1322#note_21741

Lollypop crashes reproducibly when I open this mentioned widget, close it and want to open it once again (I added a screencast there). The author was able to reproduce it, added a backtrace and asked me to open a bug report here. I don’t have any idea about the graphics stack and hope that this is somewhat self-explaining… :/


```
#0  0x00007fce563644fb in update_buffers (dri2_surf=dri2_surf@entry=0x55b5be7fc690)
    at drivers/dri2/platform_wayland.c:541
541    if (dri2_surf->base.Width != dri2_surf->wl_win->width ||
[Current thread is 1 (Thread 0x7fcf0040c540 (LWP 28330))]
(gdb) backtrace
#0  0x00007fce563644fb in update_buffers (dri2_surf=dri2_surf@entry=0x55b5be7fc690)
    at drivers/dri2/platform_wayland.c:541
#1  0x00007fce563645e4 in image_get_buffers (driDrawable=driDrawable@entry=0x55b5be65a7e0, format=<optimized out>, stamp=stamp@entry=0x55b5be65a810, loaderPrivate=loaderPrivate@entry=0x55b5be7fc690, buffer_mask=buffer_mask@entry=1, buffers=buffers@entry=0x7ffdcc8754a0)
    at drivers/dri2/platform_wayland.c:669
#2  0x00007fce54c1bc2e in intel_update_image_buffers (drawable=0x55b5be65a7e0, brw=0x55b5bdc241a0) at brw_context.c:1657
#3  0x00007fce54c1bc2e in intel_update_renderbuffers (context=context@entry=0x55b5bd2c53b0, drawable=drawable@entry=0x55b5be65a7e0) at brw_context.c:1325
#4  0x00007fce54c1bf51 in intel_prepare_render (brw=brw@entry=0x55b5bdc241a0)
    at brw_context.c:1346
#5  0x00007fce54c1d364 in brw_try_draw_prims (indirect=0x0, stream=0, xfb_obj=0x0, max_index=5, min_index=0, index_bounds_valid=<optimized out>, ib=0x0, nr_prims=1, prims=0x7ffdcc8755f0, arrays=0x55b5be634e68, ctx=0x55b5bdc241a0) at brw_draw.c:647
#6  0x00007fce54c1d364 in brw_draw_prims (ctx=0x55b5bdc241a0, prims=0x7ffdcc8755f0, nr_prims=1, ib=0x0, index_bounds_valid=<optimized out>, min_index=<optimized out>, max_index=<optimized out>, gl_xfb_obj=0x0, stream=0, indirect=0x0) at brw_draw.c:869
#7  0x00007fce549990fb in vbo_draw_arrays (ctx=ctx@entry=0x55b5bdc241a0, mode=mode@entry=4, start=start@entry=0, count=count@entry=6, numInstances=numInstances@entry=1, baseInstance=baseInstance@entry=0, drawID=0) at vbo/vbo_exec_array.c:486
#8  0x00007fce54999378 in vbo_exec_DrawArrays (mode=4, start=0, count=6)
    at vbo/vbo_exec_array.c:641
#9  0x00007fcef449de2c in gdk_gl_texture_quads (paint_context=paint_context@entry=0x55b5bda6f4e0 [GdkWaylandGLContext], texture_target=texture_target@entry=3553, n_quads=n_quads@entry=1, quads=quads@entry=0x7ffdcc8757f0, flip_colors=flip_colors@entry=1) at gdkgl.c:286
#10 0x00007fcef449e18c in gdk_gl_texture_from_surface (surface=0x55b5be835370, region=region@entry=0x55b5be724e00) at gdkgl.c:809
#11 0x00007fcef44b4aac in gdk_window_end_paint_internal (window=window@entry=0x55b5be050010 [GdkWaylandWindow]) at gdkwindow.c:3038
#12 0x00007fcef44b4c88 in gdk_window_end_draw_frame (window=window@entry=0x55b5be050010 [GdkWaylandWindow], context=context@entry=0x55b5bd90e6f0 [GdkDrawingContext])
    at gdkwindow.c:3289
#13 0x00007fceedb9b6e3 in gtk_widget_render (widget=widget@entry=0x55b5bc8f42a0 [lollypop+window+Window], window=0x55b5be050010 [GdkWaylandWindow], region=<optimized out>)
    at gtkwidget.c:17522

```