Added fix for mozbz#1767916

1 files changed, 21 insertions, 0 deletions

diff --git a/D145541.diff b/D145541.diff
new file mode 100644
index 0000000..7ca3a2e
--- /dev/null
+++ b/D145541.diff
@@ -0,0 +1,21 @@
+diff --git a/widget/gtk/MozContainerWayland.cpp b/widget/gtk/MozContainerWayland.cpp
+--- a/widget/gtk/MozContainerWayland.cpp
++++ b/widget/gtk/MozContainerWayland.cpp
+@@ -527,10 +527,16 @@
+       return;
+     }
+ 
+     LOGWAYLAND("%s [%p] scale %d\n", __FUNCTION__,
+                (void*)moz_container_get_nsWindow(container), scale);
++    // There is a chance that the attached wl_buffer has not yet been doubled
++    // on the main thread when scale factor changed to 2. This leads to
++    // crash with the following message:
++    // Buffer size (AxB) must be an integer multiple of the buffer_scale (2)
++    // Removing the possibly wrong wl_buffer to prevent that crash:
++    wl_surface_attach(wl_container->surface, nullptr, 0, 0);
+     wl_surface_set_buffer_scale(wl_container->surface, scale);
+     wl_container->buffer_scale = scale;
+   }
+ }
+ 
+