backends/x11: Only free cursor if it was created successfully

XcursorLibraryLoadCursor can return 'None' if the current cursor theme
is missing the requested icon. If XFreeCursor is then called on this
cursor, it generates a BadCursor error causing gnome-shell to crash.

Fixes https://gitlab.gnome.org/GNOME/mutter/issues/254

(cherry picked from commit 1bfa20929b)
This commit is contained in:
Sebastian Keller 2018-08-02 00:58:56 +02:00 committed by Ray Strode
parent f607df49ec
commit 2d36f92c55

View File

@ -1397,6 +1397,8 @@ meta_screen_update_cursor (MetaScreen *screen)
XDefineCursor (display->xdisplay, screen->xroot, xcursor);
XFlush (display->xdisplay);
if (xcursor)
XFreeCursor (display->xdisplay, xcursor);
}