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surface: fix destroyed subsurfaces handling

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wlr_subsurface_from_wlr_surface can return NULL if the wl_surface is still
alive and if the wl_subsurface has been destroyed. Make sure we check for NULL.

Fixes https://github.com/swaywm/sway/issues/3195
This commit is contained in:
emersion 2018-11-26 23:16:40 +01:00
parent eaa852ed77
commit a5b8ea90d2
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2 changed files with 11 additions and 5 deletions
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4
include/wlr/types/wlr_compositor.h
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@ -43,6 +43,10 @@ struct wlr_compositor *wlr_compositor_create(struct wl_display *display,
bool wlr_surface_is_subsurface(struct wlr_surface *surface);
/**
* Get a subsurface from a surface. Can return NULL if the subsurface has been
* destroyed.
*/
struct wlr_subsurface *wlr_subsurface_from_wlr_surface(
struct wlr_surface *surface);