Add a test of handling of circular values to testcover-tests

* test/lisp/emacs-lisp-testcover-resources/testcases.el
(testcover-testcase-cyc1): New function.
(testcover-tests-circular-lists-bug-24402): New test.

diff --git a/test/lisp/emacs-lisp/testcover-resources/testcases.el b/test/lisp/emacs-lisp/testcover-resources/testcases.el
index 1eb791a993ca6655e2a066da3d98436675a62408..c9a5a6daacd7f8428e4b9f5d05306e6a7d7c92af 100644 (file)
--- a/test/lisp/emacs-lisp/testcover-resources/testcases.el
+++ b/test/lisp/emacs-lisp/testcover-resources/testcases.el
@@ -490,4 +490,14 @@ edebug spec, so testcover needs to cope with that."
 
 (should (eq (testcover-testcase-how-do-i-know-you "Liz") 'unknown))
 
+;; ==== circular-lists-bug-24402 ====
+"Testcover captures and ignores circular list errors."
+;; ====
+(defun testcover-testcase-cyc1 (a)
+  (let ((ls (make-list 10 a%%%)))
+    (nconc ls ls)
+    ls))
+(testcover-testcase-cyc1 1)
+(testcover-testcase-cyc1 1)
+
 ;; testcases.el ends here.