patch 8.1.1827: allocating more memory than needed for extended structs commit https://github.com/vim/vim/commit/47ed553fd5bebfc36eb8aa81686eeaa5a84eccac Author: Bram Moolenaar <Bram@vim.org> Date: Thu Aug 8 20:49:14 2019 +0200 patch 8.1.1827: allocating more memory than needed for extended structs Problem: Allocating more memory than needed for extended structs. Solution: Use offsetof() instead of sizeof(). (Dominique Pelle, closes #4786)

--- a/src/structs.h
+++ b/src/structs.h
@@ -742,9 +742,9 @@ typedef struct proptype_S
 // Sign group
 typedef struct signgroup_S
 {
+    int		next_sign_id;		// next sign id for this group
     short_u	refcount;		// number of signs in this group
-    int		next_sign_id;		// next sign id for this group
-    char_u	sg_name[1];		// sign group name
+    char_u	sg_name[1];		// sign group name, actually longer
 } signgroup_T;
 
 typedef struct signlist signlist_T;