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

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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 1bfa20929b36d06cc23667d1122175149615b56d)
This commit is contained in:
Sebastian Keller 2018-08-02 00:58:56 +02:00 committed by Ray Strode
parent f607df49ec
commit 2d36f92c55
1 changed files with 3 additions and 1 deletions
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4
src/core/screen.c
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@ -1397,7 +1397,9 @@ meta_screen_update_cursor (MetaScreen *screen)
XDefineCursor (display->xdisplay, screen->xroot, xcursor);
XFlush (display->xdisplay);
XFreeCursor (display->xdisplay, xcursor);
if (xcursor)
XFreeCursor (display->xdisplay, xcursor);
}
void