5 files changed, 38 insertions, 21 deletions
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/foo-inlinable.el b/test/lisp/emacs-lisp/bytecomp-resources/foo-inlinable.el
new file mode 100644
index 00000000000..47481574ea8
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/foo-inlinable.el
@@ -0,0 +1,6 @@
+;; -*- lexical-binding: t; -*-
+
+(defsubst foo-inlineable (foo-var)
+  (+ foo-var 2))
+
+(provide 'foo-inlinable)
diff --git a/test/lisp/emacs-lisp/bytecomp-resources/nowarn-inline-after-defvar.el b/test/lisp/emacs-lisp/bytecomp-resources/nowarn-inline-after-defvar.el
new file mode 100644
index 00000000000..5582b2ab0ea
--- /dev/null
+++ b/test/lisp/emacs-lisp/bytecomp-resources/nowarn-inline-after-defvar.el
@@ -0,0 +1,17 @@
+;; -*- lexical-binding: t; -*-
+
+;; In this test, we try and make sure that inlined functions's code isn't
+;; mistakenly re-interpreted in the caller's context: we import an
+;; inlinable function from another file where `foo-var' is a normal
+;; lexical variable, and then call(inline) it in a function where
+;; `foo-var' is a dynamically-scoped variable.
+
+(require 'foo-inlinable
+         (expand-file-name "foo-inlinable.el"
+                           (file-name-directory
+                            (or byte-compile-current-file load-file-name))))
+
+(defvar foo-var)
+
+(defun foo-fun ()
+  (+ (foo-inlineable 5) 1))
diff --git a/test/lisp/emacs-lisp/bytecomp-tests.el b/test/lisp/emacs-lisp/bytecomp-tests.el
index 263736af4ed..980b402ca2d 100644
--- a/test/lisp/emacs-lisp/bytecomp-tests.el
+++ b/test/lisp/emacs-lisp/bytecomp-tests.el
@@ -713,6 +713,10 @@ Subtests signal errors if something goes wrong."
  "warn-wide-docstring-multiline.el"
  "defvar.*foo.*wider than.*characters")
 
+(bytecomp--define-warning-file-test
+ "nowarn-inline-after-defvar.el"
+ "Lexical argument shadows" 'reverse)
+
 
 ;;;; Macro expansion.
 
diff --git a/test/lisp/emacs-lisp/cl-lib-tests.el b/test/lisp/emacs-lisp/cl-lib-tests.el
index 97a44c43ef7..065ca4fa651 100644
--- a/test/lisp/emacs-lisp/cl-lib-tests.el
+++ b/test/lisp/emacs-lisp/cl-lib-tests.el
@@ -543,15 +543,7 @@
                            (apply (lambda (x) (+ x 1)) (list 8)))))
                  '(5 (6 5) (6 6) 9))))
 
-(defun cl-lib-tests--dummy-function ()
-  ;; Dummy function to see if the file is compiled.
-  t)
-
 (ert-deftest cl-lib-defstruct-record ()
-  ;; This test fails when compiled, see Bug#24402/27718.
-  :expected-result (if (byte-code-function-p
-                        (symbol-function 'cl-lib-tests--dummy-function))
-                       :failed :passed)
   (cl-defstruct foo x)
   (let ((x (make-foo :x 42)))
     (should (recordp x))
@@ -566,6 +558,7 @@
     (should (eq (type-of x) 'vector))
 
     (cl-old-struct-compat-mode 1)
+    (defvar cl-struct-foo)
     (let ((cl-struct-foo (cl--struct-get-class 'foo)))
       (setf (symbol-function 'cl-struct-foo) :quick-object-witness-check)
       (should (eq (type-of x) 'foo))
diff --git a/test/lisp/emacs-lisp/seq-tests.el b/test/lisp/emacs-lisp/seq-tests.el
index 670398354a6..05c7fbe781e 100644
--- a/test/lisp/emacs-lisp/seq-tests.el
+++ b/test/lisp/emacs-lisp/seq-tests.el
@@ -29,6 +29,9 @@
 (require 'ert)
 (require 'seq)
 
+(eval-when-compile
+  (require 'cl-lib))
+
 (defmacro with-test-sequences (spec &rest body)
   "Successively bind VAR to a list, vector, and string built from SEQ.
 Evaluate BODY for each created sequence.
@@ -108,16 +111,12 @@ Evaluate BODY for each created sequence.
                  '((a 0) (b 1) (c 2) (d 3)))))
 
 (ert-deftest test-seq-do-indexed ()
-  (let ((result nil))
-    (seq-do-indexed (lambda (elt i)
-                      (add-to-list 'result (list elt i)))
-                    nil)
-    (should (equal result nil)))
+  (let (result)
+    (seq-do-indexed (lambda (elt i) (push (list elt i) result)) ())
+    (should-not result))
   (with-test-sequences (seq '(4 5 6))
-    (let ((result nil))
-      (seq-do-indexed (lambda (elt i)
-                        (add-to-list 'result (list elt i)))
-                      seq)
+    (let (result)
+      (seq-do-indexed (lambda (elt i) (push (list elt i) result)) seq)
       (should (equal (seq-elt result 0) '(6 2)))
       (should (equal (seq-elt result 1) '(5 1)))
       (should (equal (seq-elt result 2) '(4 0))))))
@@ -410,12 +409,10 @@ Evaluate BODY for each created sequence.
 
 (ert-deftest test-seq-random-elt-take-all ()
   (let ((seq '(a b c d e))
-        (elts '()))
-    (should (= 0 (length elts)))
+        elts)
     (dotimes (_ 1000)
       (let ((random-elt (seq-random-elt seq)))
-        (add-to-list 'elts
-                     random-elt)))
+        (cl-pushnew random-elt elts)))
     (should (= 5 (length elts)))))
 
 (ert-deftest test-seq-random-elt-signal-on-empty ()