diff options
Diffstat (limited to 'lisp/custom.el')
| -rw-r--r-- | lisp/custom.el | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/lisp/custom.el b/lisp/custom.el index 2b7621229d9..a6e2ab351d4 100644 --- a/lisp/custom.el +++ b/lisp/custom.el @@ -90,6 +90,16 @@ The value is either the symbol's current value (as obtained using the `:get' function), if any, or the value in the symbol's `saved-value' property if any, or (last of all) the value of EXP." + ;; If this value has been set with `setopt' (for instance in + ;; ~/.emacs), we didn't necessarily know the type of the user option + ;; then. So check now, and issue a warning if it's wrong. + (when-let ((value (get symbol 'custom-check-value)) + (type (get symbol 'custom-type))) + (when (and (boundp symbol) + (eq (car value) (symbol-value symbol)) + ;; Check that the type is correct. + (not (widget-apply (widget-convert type) :match (car value)))) + (warn "Value `%S' for `%s' does not match type %s" value symbol type))) (funcall (or (get symbol 'custom-set) #'set-default-toplevel-value) symbol (condition-case nil |