patch 8.2.2760: Vim9: no error for changing a for loop variable
Problem: Vim9: no error for changing a for loop variable.
Solution: Make the loop variable read-only. (issue #8102)
diff --git a/src/vim.h b/src/vim.h
index baa3526..4c9e095 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -2158,6 +2158,7 @@
#define ASSIGN_DECL 0x08 // may declare variable if it does not exist
#define ASSIGN_UNPACK 0x10 // using [a, b] = list
#define ASSIGN_NO_MEMBER_TYPE 0x20 // use "any" for list and dict member type
+#define ASSIGN_FOR_LOOP 0x40 // assigning to loop variable
#include "ex_cmds.h" // Ex command defines
#include "spell.h" // spell checking stuff