Subject: bug#29334: 25.3; compiled commands don't respect special interactive expressions

From: Noam Postavsky <[email-masked]>
Date: Thu, 23 Nov 2017 22:11:23 -0500

tags 29334 + patch
quit

Glenn Morris <[email-masked]> writes:

> Bisected to a46481370, our old friend "Use lexical-binding".

How about this:

>From a8b43e98c592c84957ea304a0dc2d6423af9c5c5 Mon Sep 17 00:00:00 2001
From: Noam Postavsky <[email-masked]>
Date: Thu, 23 Nov 2017 21:57:09 -0500
Subject: [PATCH] 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.
---
 lisp/emacs-lisp/bytecomp.el | 6 +-----
 src/callint.c               | 4 +++-
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index 590db570c5..e16405f09b 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -2823,11 +2823,7 @@ byte-compile-lambda
 		 (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 5d88082e38..48ea9ba7a3 100644
--- a/src/callint.c
+++ b/src/callint.c
@@ -356,7 +356,9 @@ DEFUN ("call-interactively", Fcall_interactively, Scall_interactively, 1, 3, 0,
       /* 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.  */
-- 
2.11.0