Merge branch 'fix-0px-csd-crash'

CHANGELOG.md

@@ -47,6 +47,7 @@
 * ‘Sticky’ modifiers in input handling; when determining modifier
   state, foot was looking at **depressed** modifiers, not
   **effective** modifiers, like it should.
+* Fix crashes after enabling CSD at runtime when `csd.size` is 0.
 
 
 ### Security

render.c

@@ -1673,7 +1673,8 @@ render_csd_title(struct terminal *term, const struct csd_data *info,
     xassert(term->window->csd_mode == CSD_YES);
 
     struct wl_surf_subsurf *surf = &term->window->csd.surface[CSD_SURF_TITLE];
-    xassert(info->width > 0 && info->height > 0);
+    if (info->width == 0 || info->height == 0)
+        return;
 
     xassert(info->width % term->scale == 0);
     xassert(info->height % term->scale == 0);

shm.c

@@ -322,6 +322,8 @@ get_new_buffers(struct buffer_chain *chain, size_t count,
         sizes[i] = stride[i] * heights[i];
         total_size += sizes[i];
     }
+    if (total_size == 0)
+        return;
 
     int pool_fd = -1;
 
@@ -486,7 +488,7 @@ get_new_buffers(struct buffer_chain *chain, size_t count,
     }
 #endif
 
-    if (!shm_can_scroll(bufs[0])) {
+    if (!(bufs[0] && shm_can_scroll(bufs[0]))) {
         /* We only need to keep the pool FD open if we’re going to SHM
          * scroll it */
         close(pool_fd);