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-rw-r--r--runtime/doc/eval.txt7
1 files changed, 5 insertions, 2 deletions
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 1105601a0e..88ab502ab6 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -8606,9 +8606,12 @@ This does NOT work: >
:lockvar v
:let v = 'asdf' " fails!
:unlet v
-< *E741*
+< *E741* *E940*
If you try to change a locked variable you get an
- error message: "E741: Value is locked: {name}"
+ error message: "E741: Value is locked: {name}".
+ If you try to lock or unlock a built-in variable you
+ will get an error message "E940: Cannot lock or unlock
+ variable {name}".
[depth] is relevant when locking a |List| or
|Dictionary|. It specifies how deep the locking goes: