Fix command repetition with lexical-binding (Bug#29334)

`call-interactively' relies on analyzing the source of `interactive'
forms in order to preserve arguments like (region-end) in the command
history, rather than just storing the resulting position.  However,
the byte-compiler does not preserve the source of the interactive form
when lexical-binding is in effect, because `call-interactively' would
evaluate the form with dynamic binding in that case.

To fix this, change `call-interactively' so that it checks compiled
functions for lexical-binding as well.  Then the byte-compiler can
preserve the source of interactive forms regardless of the value of
lexical-binding.

* src/callint.c (Fcall_interactively): Functions compiled with
lexical-binding have their arglist encoded as an integer, use this to
choose the right kind of binding for compiled functions too.
* lisp/emacs-lisp/bytecomp.el (byte-compile-lambda): Preserve the
uncompiled form of the interactive form when lexical-binding is
enabled too.

2 files changed, 4 insertions, 6 deletions

diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index 2f5f9f8c054..564aac2fc6a 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -2839,11 +2839,7 @@ for symbols generated by the byte compiler itself."
                  (while (consp (cdr form))
                    (setq form (cdr form)))
                  (setq form (car form)))
-               (if (and (eq (car-safe form) 'list)
-                        ;; The spec is evalled in callint.c in dynamic-scoping
-                        ;; mode, so just leaving the form unchanged would mean
-                        ;; it won't be eval'd in the right mode.
-                        (not lexical-binding))
+               (if (eq (car-safe form) 'list)
                    nil
                  (setq int `(interactive ,newform)))))
             ((cdr int)
diff --git a/src/callint.c b/src/callint.c
index c713e08d4d4..dcda0bcf7a0 100644
--- a/src/callint.c
+++ b/src/callint.c
@@ -357,7 +357,9 @@ invoke it.  If KEYS is omitted or nil, the return value of
       /* Compute the arg values using the user's expression.  */
       specs = Feval (specs,
                      CONSP (funval) && EQ (Qclosure, XCAR (funval))
-                     ? CAR_SAFE (XCDR (funval)) : Qnil);
+                     ? CAR_SAFE (XCDR (funval))
+                     : COMPILEDP (funval) && INTEGERP (AREF (funval, COMPILED_ARGLIST))
+                     ? Qt : Qnil);
       if (events != num_input_events || !NILP (record_flag))
         {
           /* We should record this command on the command history.  */