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-rw-r--r--test/src/alloc-tests.el7
1 files changed, 7 insertions, 0 deletions
diff --git a/test/src/alloc-tests.el b/test/src/alloc-tests.el
index 4eb776a0555..aa1ab1648f8 100644
--- a/test/src/alloc-tests.el
+++ b/test/src/alloc-tests.el
@@ -51,3 +51,10 @@
(should-not (eq x y))
(dotimes (i 4)
(should (eql (aref x i) (aref y i))))))
+
+;; Bug#39207
+(ert-deftest aset-nbytes-change ()
+ (let ((s (make-string 1 ?a)))
+ (dolist (c (list 10003 ?b 128 ?c ?d (max-char) ?e))
+ (aset s 0 c)
+ (should (equal s (make-string 1 c))))))