patch 9.0.0460: loop variable can't be found
Problem: Loop variable can't be found.
Solution: Adjust block_id of the loop variable each round.
diff --git a/src/proto/vim9compile.pro b/src/proto/vim9compile.pro
index e6c6f3e..13b96c2 100644
--- a/src/proto/vim9compile.pro
+++ b/src/proto/vim9compile.pro
@@ -1,6 +1,7 @@
/* vim9compile.c */
int lookup_local(char_u *name, size_t len, lvar_T *lvar, cctx_T *cctx);
int arg_exists(char_u *name, size_t len, int *idxp, type_T **type, int *gen_load_outer, cctx_T *cctx);
+void update_script_var_block_id(char_u *name, int block_id);
int script_is_vim9(void);
int script_var_exists(char_u *name, size_t len, cctx_T *cctx, cstack_T *cstack);
int check_defined(char_u *p, size_t len, cctx_T *cctx, cstack_T *cstack, int is_arg);