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-rw-r--r--types/wlr_output.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/types/wlr_output.c b/types/wlr_output.c
index 38bb03d5..abfc6d26 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -191,6 +191,8 @@ void wlr_output_set_position(struct wlr_output *output, int32_t lx,
void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
const struct wlr_output_impl *impl) {
+ assert(impl->enable && impl->make_current && impl->swap_buffers &&
+ impl->transform);
output->backend = backend;
output->impl = impl;
wl_list_init(&output->modes);