patch 8.2.0677: Vim9: no support for closures
Problem: Vim9: no support for closures.
Solution: Find variables in the outer function scope, so long as the scope
exists.
diff --git a/src/proto/vim9compile.pro b/src/proto/vim9compile.pro
index 76a9c99..76fca4f 100644
--- a/src/proto/vim9compile.pro
+++ b/src/proto/vim9compile.pro
@@ -9,7 +9,7 @@
char_u *to_name_const_end(char_u *arg);
int assignment_len(char_u *p, int *heredoc);
int check_vim9_unlet(char_u *name);
-void compile_def_function(ufunc_T *ufunc, int set_return_type);
+void compile_def_function(ufunc_T *ufunc, int set_return_type, cctx_T *outer_cctx);
void delete_instr(isn_T *isn);
void delete_def_function(ufunc_T *ufunc);
void free_def_functions(void);