Avoid crashes on MS-Windows on repeated client connections

* src/w32uniscribe.c (uniscribe_close): Zero out dwrite cache.
Suggested by Richard Copley <rcopley@gmail.com>.  (Bug#76121)

(cherry picked from commit c116dad608afcf28384651101e8b6c6b7999f56e)

diff --git a/src/w32uniscribe.c b/src/w32uniscribe.c
index 9986c9dc2f91efc5e88c7f18a06820680cc0b3c9..b412be6f2e16db25c4dcb5f201e03a9fc55b0c3c 100644 (file)
--- a/src/w32uniscribe.c
+++ b/src/w32uniscribe.c
@@ -204,6 +204,7 @@ uniscribe_close (struct font *font)
 
 #ifdef HAVE_HARFBUZZ
   w32_dwrite_free_cached_face (uniscribe_font->dwrite_cache);
+  uniscribe_font->dwrite_cache = NULL;
   if (uniscribe_font->w32_font.font.driver == &harfbuzz_font_driver
       && uniscribe_font->cache)
     hb_font_destroy ((hb_font_t *) uniscribe_font->cache);