patch 9.0.1271: using sizeof() and subtract array size is tricky Commit: https://github.com/vim/vim/commit/1b438a8228a415720efb5ca1c0503f5467292e8e Author: zeertzjq <zeertzjq@outlook.com> Date: Wed Feb 1 13:11:15 2023 +0000 patch 9.0.1271: using sizeof() and subtract array size is tricky Problem: Using sizeof() and subtract array size is tricky. Solution: Use offsetof() instead. (closes https://github.com/vim/vim/issues/11926)

--- a/src/spellsuggest.c
+++ b/src/spellsuggest.c
@@ -3228,7 +3228,7 @@ add_sound_suggest(
     hi = hash_lookup(&slang->sl_sounddone, goodword, hash);
     if (HASHITEM_EMPTY(hi))
     {
-	sft = alloc(sizeof(sftword_T) + STRLEN(goodword));
+	sft = alloc(offsetof(sftword_T, sft_word) + STRLEN(goodword) + 1);
 	if (sft != NULL)
 	{
 	    sft->sft_score = score;