patch 8.2.1471: :const only locks the variable, not the value
Problem: :const only locks the variable, not the value.
Solution: Lock the value as ":lockvar 1 var" would do. (closes #6719)
diff --git a/src/testdir/test_const.vim b/src/testdir/test_const.vim
index a0f919e..c993f56 100644
--- a/src/testdir/test_const.vim
+++ b/src/testdir/test_const.vim
@@ -41,6 +41,7 @@
call assert_fails('let s = "vim"', 'E741:')
call assert_fails('let F = funcref("s:noop")', 'E741:')
call assert_fails('let l = [1, 2, 3]', 'E741:')
+ call assert_fails('call filter(l, "v:val % 2 == 0")', 'E741:')
call assert_fails('let d = {"foo": 10}', 'E741:')
if has('channel')
call assert_fails('let j = test_null_job()', 'E741:')
@@ -276,13 +277,16 @@
const l = [1, 2, 3]
const d = {'foo': 10}
- " Modify list
- call add(l, 4)
+ " Modify list - setting item is OK, adding/removing items not
let l[0] = 42
+ call assert_fails('call add(l, 4)', 'E741:')
+ call assert_fails('unlet l[1]', 'E741:')
- " Modify dict
- let d['bar'] = 'hello'
+ " Modify dict - changing item is OK, adding/removing items not
+ let d['foo'] = 'hello'
let d.foo = 44
+ call assert_fails("let d['bar'] = 'hello'", 'E741:')
+ call assert_fails("unlet d['foo']", 'E741:')
endfunc
" vim: shiftwidth=2 sts=2 expandtab