[gtk/4.0-backports: 1/53] Abort if the shared memory pool cannot be created

[Matthias Clasen <matthiasc src gnome org>]

commit 201580b4436c390bcde31101ee9e2b6a8f30de67
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Jan 20 19:10:54 2021 +0000

    Abort if the shared memory pool cannot be created
    
    If we cannot allocate memory, we cannot create any windowing system
    surface. There's no coming back from that.
    
    Fixes: #3607

 gdk/wayland/gdkdisplay-wayland.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)
---
diff --git a/gdk/wayland/gdkdisplay-wayland.c b/gdk/wayland/gdkdisplay-wayland.c
index f5ea972fa2..3acc10ed50 100644
--- a/gdk/wayland/gdkdisplay-wayland.c
+++ b/gdk/wayland/gdkdisplay-wayland.c
@@ -1350,21 +1350,23 @@ _gdk_wayland_display_create_shm_surface (GdkWaylandDisplay *display,
   data->buffer = NULL;
   data->scale = scale;
 
-  stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, width*scale);
+  stride = cairo_format_stride_for_width (CAIRO_FORMAT_ARGB32, width * scale);
 
   data->pool = create_shm_pool (display->shm,
-                                height*scale*stride,
+                                height * scale * stride,
                                 &data->buf_length,
                                 &data->buf);
+  if (G_UNLIKELY (data->pool == NULL))
+    g_error ("Unable to create shared memory pool");
 
   surface = cairo_image_surface_create_for_data (data->buf,
                                                  CAIRO_FORMAT_ARGB32,
-                                                 width*scale,
-                                                 height*scale,
+                                                 width * scale,
+                                                 height * scale,
                                                  stride);
 
   data->buffer = wl_shm_pool_create_buffer (data->pool, 0,
-                                            width*scale, height*scale,
+                                            width * scale, height * scale,
                                             stride, WL_SHM_FORMAT_ARGB8888);
 
   cairo_surface_set_user_data (surface, &gdk_wayland_shm_surface_cairo_key,