patch 8.2.3751: cannot assign a lambda to an option that takes a function Commit: https://github.com/vim/vim/commit/6409553b6e3b4de4e1d72b8ee5445595214581ff Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Mon Dec 6 11:03:55 2021 +0000 patch 8.2.3751: cannot assign a lambda to an option that takes a function Problem: Cannot assign a lambda to an option that takes a function. Solution: Automatically convert the lambda to a string. (Yegappan Lakshmanan, closes #9286)

--- a/src/spell.c
+++ b/src/spell.c
@@ -3830,7 +3830,7 @@ ex_spelldump(exarg_T *eap)
 
     if (no_spell_checking(curwin))
 	return;
-    (void)get_option_value((char_u*)"spl", &dummy, &spl, OPT_LOCAL);
+    (void)get_option_value((char_u*)"spl", &dummy, &spl, NULL, OPT_LOCAL);
 
     // Create a new empty buffer in a new window.
     do_cmdline_cmd((char_u *)"new");