patch 8.1.1485: double free when garbage_collect() is used in autocommand commit https://github.com/vim/vim/commit/c07f67ad0e9c48a07d49f2d67eb63e183a22386a Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 6 19:03:17 2019 +0200 patch 8.1.1485: double free when garbage_collect() is used in autocommand Problem: Double free when garbage_collect() is used in autocommand. Solution: Have garbage collection also set the copyID in funccal_stack.

--- a/src/eval.c
+++ b/src/eval.c
@@ -430,12 +430,11 @@ eval_clear(void)
 	vim_free(SCRIPT_SV(i));
     ga_clear(&ga_scripts);
 
-    // functions need to be freed before gargabe collecting, otherwise local
-    // variables might be freed twice.
-    free_all_functions();
-
     // unreferenced lists and dicts
     (void)garbage_collect(FALSE);
+
+    // functions not garbage collected
+    free_all_functions();
 }
 #endif