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Avoid segfaults due to frame image cache being absent
* src/image.c (cache_image): If the frame doesn't have an image cache, create it. (Bug#23028)
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@ -1830,6 +1830,9 @@ cache_image (struct frame *f, struct image *img)
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struct image_cache *c = FRAME_IMAGE_CACHE (f);
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ptrdiff_t i;
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if (!c)
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c = FRAME_IMAGE_CACHE (f) = make_image_cache ();
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/* Find a free slot in c->images. */
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for (i = 0; i < c->used; ++i)
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if (c->images[i] == NULL)
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