Patch to make emacs (emacs-28 branch) aware of the macOS 10.14+ system appearance changes.

ns_system_appearance_change_emacs-28.patch

From 2fd6ee35bbcdd0a07e882e07706edaa01815853b Mon Sep 17 00:00:00 2001
From: "Nicolas G. Querol" <[email protected]>
Date: Wed, 11 Nov 2020 12:35:47 +0100
Subject: [PATCH] Add `ns-system-appearance-change-functions' hook

This implements a new hook, effective only on macOS >= 10.14 (Mojave),
that is called when the system changes its appearance (e.g. from light
to dark). Users can then implement functions that take this change
into account, for instance to load a particular theme.

Minor changes are also made to select the right "dark" appearance
(NSAppearanceNameDarkAqua) on macOS versions >= 10.14, the previous one
(NSAppearanceNameVibrantDark) being deprecated.

* src/frame.h (enum ns_appearance_type): Add new
"ns_appearance_dark_aqua" case.

* src/nsfns.m (defun x-create-frame): Use "dark aqua" appearance on
macOS >= 10.14.

* src/nsterm.m:
  - (ns_set_appearance): Use "dark aqua" appearance on
     macOS >= 10.14, reset appearance to the system one
     if `ns-appearance' frame parameter is not set to
     either `dark' or `light'.
  - (initFrameFromEmacs): Use "dark aqua" appearance on
     macOS >= 10.14.
  - (EmacsApp) Add the `systemDidChangeAppearance' private method,
    as well as the appropriate Key-Value Observing calls to update
    the frame's appearance when the system (and thus the app's)
    appearance changes.
  - Add `ns-system-appearance-change-functions' hook variable and
    symbol, to allow users to add functions that react to the
    change of the system's appearance.
  - Add `ns-system-appearance' variable, to allow users to consult
    the current system appearance.

Here is an example on how to use this new feature:

    (defun my/load-theme (appearance)
      "Load theme, taking current system APPEARANCE into consideration."
      (mapc #'disable-theme custom-enabled-themes)
      (pcase appearance
        ('light (load-theme 'tango t))
        ('dark (load-theme 'tango-dark t))))

    (add-hook 'ns-system-appearance-change-functions #'my/load-theme)

The hook being run on each system appearance change as well as at
startup time, Emacs should then always load the appropriate theme.
---
 src/frame.h  |   3 +-
 src/nsfns.m  |  13 ++++-
 src/nsterm.m | 153 ++++++++++++++++++++++++++++++++++++++++++++++-----
 3 files changed, 153 insertions(+), 16 deletions(-)

diff --git a/src/frame.h b/src/frame.h
index b75ef79cff2..ebb992cbde9 100644
--- a/src/frame.h
+++ b/src/frame.h
@@ -71,7 +71,8 @@ #define EMACS_FRAME_H
   {
     ns_appearance_system_default,
     ns_appearance_aqua,
-    ns_appearance_vibrant_dark
+    ns_appearance_vibrant_dark,
+    ns_appearance_dark_aqua
   };
 #endif
 #endif /* HAVE_WINDOW_SYSTEM */
diff --git a/src/nsfns.m b/src/nsfns.m
index d11d4146ebd..c06cf12d8b6 100644
--- a/src/nsfns.m
+++ b/src/nsfns.m
@@ -1315,14 +1315,25 @@ Turn the input menu (an NSMenu) into a lisp list for tracking on lisp side.
   store_frame_param (f, Qundecorated, FRAME_UNDECORATED (f) ? Qt : Qnil);
 
 #ifdef NS_IMPL_COCOA
+#ifndef NSAppKitVersionNumber10_14
+#define NSAppKitVersionNumber10_14 1671
+#endif
   tem = gui_display_get_arg (dpyinfo, parms, Qns_appearance, NULL, NULL,
                              RES_TYPE_SYMBOL);
   if (EQ (tem, Qdark))
-    FRAME_NS_APPEARANCE (f) = ns_appearance_vibrant_dark;
+    if (NSAppKitVersionNumber >= NSAppKitVersionNumber10_14)
+      {
+        FRAME_NS_APPEARANCE (f) = ns_appearance_dark_aqua;
+      }
+    else
+      {
+        FRAME_NS_APPEARANCE (f) = ns_appearance_vibrant_dark;
+      }
   else if (EQ (tem, Qlight))
     FRAME_NS_APPEARANCE (f) = ns_appearance_aqua;
   else
     FRAME_NS_APPEARANCE (f) = ns_appearance_system_default;
+
   store_frame_param (f, Qns_appearance,
                      (!NILP (tem) && !EQ (tem, Qunbound)) ? tem : Qnil);
 
diff --git a/src/nsterm.m b/src/nsterm.m
index ea8770c93e9..3a4d9dca8ec 100644
--- a/src/nsterm.m
+++ b/src/nsterm.m
@@ -1878,11 +1878,25 @@ Hide the window (X11 semantics)
     return;
 
   if (EQ (new_value, Qdark))
-    FRAME_NS_APPEARANCE (f) = ns_appearance_vibrant_dark;
-  else if (EQ (new_value, Qlight))
-    FRAME_NS_APPEARANCE (f) = ns_appearance_aqua;
+    {
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
+#ifndef NSAppKitVersionNumber10_14
+#define NSAppKitVersionNumber10_14 1671
+#endif
+      if (NSAppKitVersionNumber >= NSAppKitVersionNumber10_14)
+        FRAME_NS_APPEARANCE(f) = ns_appearance_dark_aqua;
+      else
+#endif /* MAC_OS_X_VERSION_MAX_ALLOWED >= 101400 */
+        FRAME_NS_APPEARANCE(f) = ns_appearance_vibrant_dark;
+    }
+  else if (EQ(new_value, Qlight))
+    {
+      FRAME_NS_APPEARANCE (f) = ns_appearance_aqua;
+    }
   else
-    FRAME_NS_APPEARANCE (f) = ns_appearance_system_default;
+    {
+      FRAME_NS_APPEARANCE (f) = ns_appearance_system_default;
+    }
 
   [window setAppearance];
 #endif /* MAC_OS_X_VERSION_MAX_ALLOWED >= 101000 */
@@ -5375,6 +5389,7 @@ Needs to be here because ns_initialize_display_info () uses AppKit classes.
 
    ========================================================================== */
 
+static const void *kEmacsAppKVOContext = &kEmacsAppKVOContext;
 
 @implementation EmacsApp
 
@@ -5620,6 +5635,18 @@ - (void)applicationDidFinishLaunching: (NSNotification *)notification
 	 object:nil];
 #endif
 
+#if defined (NS_IMPL_COCOA) && MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
+  [self addObserver:self
+         forKeyPath:NSStringFromSelector(@selector(effectiveAppearance))
+            options:NSKeyValueObservingOptionInitial|NSKeyValueObservingOptionNew
+            context:&kEmacsAppKVOContext];
+
+   pending_funcalls = Fcons(list3(Qrun_hook_with_args,
+                                  Qns_system_appearance_change_functions,
+                                  Vns_system_appearance),
+                            pending_funcalls);
+#endif
+
 #ifdef NS_IMPL_COCOA
   /* Some functions/methods in CoreFoundation/Foundation increase the
      maximum number of open files for the process in their first call.
@@ -5658,6 +5685,68 @@ - (void)antialiasThresholdDidChange:(NSNotification *)notification
 #endif
 }
 
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(id)object
+                        change:(NSDictionary *)change
+                       context:(void *)context
+{
+#if defined (NS_IMPL_COCOA) && MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
+  if (context == kEmacsAppKVOContext
+      && object == self
+      && [keyPath isEqualToString:
+                    NSStringFromSelector (@selector(effectiveAppearance))])
+    [self systemAppearanceDidChange:
+               [change objectForKey:NSKeyValueChangeNewKey]];
+  else
+#endif /* (NS_IMPL_COCOA) && MAC_OS_X_VERSION_MAX_ALLOWED >= 101400 */
+    [super observeValueForKeyPath:keyPath
+                         ofObject:object
+                           change:change
+                          context:context];
+}
+
+#if defined (NS_IMPL_COCOA) && MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
+#ifndef NSAppKitVersionNumber10_14
+#define NSAppKitVersionNumber10_14 1671
+#endif
+- (void)systemAppearanceDidChange:(NSAppearance *)newAppearance
+{
+
+  if (NSAppKitVersionNumber < NSAppKitVersionNumber10_14)
+    return;
+
+  NSAppearanceName appearance_name =
+      [newAppearance bestMatchFromAppearancesWithNames:@[
+        NSAppearanceNameAqua, NSAppearanceNameDarkAqua
+      ]];
+
+  BOOL is_dark_appearance =
+    [appearance_name isEqualToString:NSAppearanceNameDarkAqua];
+  Vns_system_appearance = is_dark_appearance ? Qdark : Qlight;
+
+  run_system_appearance_change_hook ();
+}
+
+static inline void run_system_appearance_change_hook (void)
+{
+  if (NILP (Vns_system_appearance_change_functions))
+    return;
+
+  block_input ();
+
+  bool owfi = waiting_for_input;
+  waiting_for_input = false;
+
+  safe_call2 (Qrun_hook_with_args,
+          Qns_system_appearance_change_functions,
+          Vns_system_appearance);
+  Fredisplay(Qt);
+
+  waiting_for_input = owfi;
+
+  unblock_input ();
+}
+#endif /* (NS_IMPL_COCOA) && MAC_OS_X_VERSION_MAX_ALLOWED >= 101400 */
 
 /* Termination sequences:
     C-x C-c:
@@ -5822,6 +5911,14 @@ - (void)applicationDidResignActive: (NSNotification *)notification
   ns_send_appdefined (-1);
 }
 
+- (void)applicationWillTerminate:(NSNotification *)notification
+{
+  NSTRACE ("[EmacsApp applicationWillTerminate:]");
+
+  [self removeObserver:self
+            forKeyPath:NSStringFromSelector(@selector(effectiveAppearance))
+               context:&kEmacsAppKVOContext];
+}
 
 
 /* ==========================================================================
@@ -8819,17 +8916,26 @@ - (void)setAppearance
 #define NSAppKitVersionNumber10_10 1343
 #endif
 
-  if (NSAppKitVersionNumber < NSAppKitVersionNumber10_10)
-    return;
-
-  if (FRAME_NS_APPEARANCE (f) == ns_appearance_vibrant_dark)
-    appearance =
-      [NSAppearance appearanceNamed:NSAppearanceNameVibrantDark];
-  else if (FRAME_NS_APPEARANCE (f) == ns_appearance_aqua)
-    appearance =
-      [NSAppearance appearanceNamed:NSAppearanceNameAqua];
+   if (NSAppKitVersionNumber < NSAppKitVersionNumber10_10)
+     return;
 
-  [self setAppearance:appearance];
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
+#ifndef NSAppKitVersionNumber10_14
+#define NSAppKitVersionNumber10_14 1671
+#endif
+   if (NSAppKitVersionNumber >= NSAppKitVersionNumber10_14
+       && FRAME_NS_APPEARANCE(f) == ns_appearance_dark_aqua)
+     appearance = [NSAppearance appearanceNamed:NSAppearanceNameDarkAqua];
+   else
+#endif /* MAC_OS_X_VERSION_MAX_ALLOWED >= 101400 */
+     if (FRAME_NS_APPEARANCE(f) == ns_appearance_vibrant_dark)
+       appearance =
+         [NSAppearance appearanceNamed:NSAppearanceNameVibrantDark];
+     else if (FRAME_NS_APPEARANCE (f) == ns_appearance_aqua)
+       appearance =
+         [NSAppearance appearanceNamed:NSAppearanceNameAqua];
+
+   [self setAppearance:appearance];
 #endif /* MAC_OS_X_VERSION_MAX_ALLOWED >= 101000 */
 }
 
@@ -9996,6 +10102,25 @@ Nil means use fullscreen the old (< 10.7) way.  The old way works better with
 This variable is ignored on macOS < 10.7 and GNUstep.  Default is t.  */);
   ns_use_mwheel_momentum = YES;
 
+ DEFVAR_LISP ("ns-system-appearance", Vns_system_appearance,
+               doc: /* Current system appearance, i.e. `dark' or `light'.
+
+This variable is ignored on macOS < 10.14 and GNUstep.  Default is nil.  */);
+  Vns_system_appearance = Qnil;
+  DEFSYM(Qns_system_appearance, "ns-system-appearance");
+
+  DEFVAR_LISP ("ns-system-appearance-change-functions",
+               Vns_system_appearance_change_functions,
+     doc: /* List of functions to call when the system appearance changes.
+Each function is called with a single argument, which corresponds to the new
+system appearance (`dark' or `light').
+
+This hook is also run once at startup.
+
+This variable is ignored on macOS < 10.14 and GNUstep.  Default is nil.  */);
+  Vns_system_appearance_change_functions = Qnil;
+  DEFSYM(Qns_system_appearance_change_functions, "ns-system-appearance-change-functions");
+
   /* TODO: Move to common code.  */
   DEFVAR_LISP ("x-toolkit-scroll-bars", Vx_toolkit_scroll_bars,
 	       doc: /* SKIP: real doc in xterm.c.  */);
-- 
2.44.0

@muffinmad, you commenting this gist had me thinking I should do something about it 😀
So here is an updated version of the patch that works consistently when Emacs is in the background.
It also exposes the current system appearance through a new variable, ns-system-appearance.

Let me know how that's working for you !

@ngquerol, glad to hear from you!

After quick testing of the new patch I can confirm is working as expected.

FYI While I'm was not able to catch the automatic dark/light mode switching during my workflow, Emacs change the theme on OS resume from sleep just perfectly!

From now I will stick with the updated patch.

Thanks!

After resuming from sleep:

Process:               Emacs [12804]
Path:                  /Applications/Emacs.app/Contents/MacOS/Emacs
Identifier:            org.gnu.Emacs
Version:               Version 28.0.50 (9.0)
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Emacs [12804]
User ID:               501

Date/Time:             2020-11-10 17:54:44.165 +0200
OS Version:            Mac OS X 10.15.7 (19H2)
Report Version:        12
Anonymous UUID:        91C25591-E15C-1151-477D-A560DC709258

Sleep/Wake UUID:       70690975-396C-4F94-A378-5BB5D8183107

Time Awake Since Boot: 240000 seconds
Time Since Wake:       8 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fff69d5533a __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fff69e11e60 pthread_kill + 430
2   libsystem_c.dylib             	0x00007fff69c6c93e raise + 26
3   org.gnu.Emacs                 	0x00000001067feded terminate_due_to_signal + 150
4   org.gnu.Emacs                 	0x00000001067ff4cd emacs_abort + 15
5   org.gnu.Emacs                 	0x00000001067cc482 ns_term_shutdown + 119
6   org.gnu.Emacs                 	0x00000001066ef19e shut_down_emacs + 339
7   org.gnu.Emacs                 	0x00000001067fedbb terminate_due_to_signal + 100
8   org.gnu.Emacs                 	0x00000001067ff4cd emacs_abort + 15
9   org.gnu.Emacs                 	0x000000010675defd signal_or_quit + 1246
10  org.gnu.Emacs                 	0x0000000106800c39 Fsignal + 32
11  org.gnu.Emacs                 	0x0000000106800c4f xsignal + 9
12  org.gnu.Emacs                 	0x0000000106800ac4 xsignal1 + 28
13  org.gnu.Emacs                 	0x00000001068013f6 invalid_syntax + 22
14  org.gnu.Emacs                 	0x0000000106781b52 read1 + 6516
15  org.gnu.Emacs                 	0x0000000106781bbe read0 + 20
16  org.gnu.Emacs                 	0x000000010677ffa6 read_list + 287
17  org.gnu.Emacs                 	0x00000001067809bf read1 + 2017
18  org.gnu.Emacs                 	0x0000000106781bbe read0 + 20
19  org.gnu.Emacs                 	0x00000001067809ab read1 + 1997
20  org.gnu.Emacs                 	0x000000010677feca read_list + 67
21  org.gnu.Emacs                 	0x00000001067809bf read1 + 2017
22  org.gnu.Emacs                 	0x0000000106781bbe read0 + 20
23  org.gnu.Emacs                 	0x000000010677d3e3 read_internal_start + 423
24  org.gnu.Emacs                 	0x000000010675f2ba funcall_subr + 272
25  org.gnu.Emacs                 	0x000000010675eb65 Ffuncall + 646
26  org.gnu.Emacs                 	0x0000000106793758 exec_byte_code + 1163
27  org.gnu.Emacs                 	0x000000010675eb03 Ffuncall + 548
28  org.gnu.Emacs                 	0x0000000106793758 exec_byte_code + 1163
29  org.gnu.Emacs                 	0x000000010675eb03 Ffuncall + 548
30  org.gnu.Emacs                 	0x000000010675eb65 Ffuncall + 646
31  org.gnu.Emacs                 	0x0000000106793758 exec_byte_code + 1163
32  org.gnu.Emacs                 	0x000000010675eb03 Ffuncall + 548
33  org.gnu.Emacs                 	0x000000010675ef4d call1 + 46
34  org.gnu.Emacs                 	0x00000001066f8c6d timer_check + 834
35  org.gnu.Emacs                 	0x00000001066f79a8 readable_events + 18
36  org.gnu.Emacs                 	0x00000001066f891d get_input_pending + 118
37  org.gnu.Emacs                 	0x00000001066f7803 swallow_events + 38
38  org.gnu.Emacs                 	0x0000000106654da6 Fredisplay + 20
39  org.gnu.Emacs                 	0x00000001067ccff9 -[EmacsApp systemAppearanceDidChange:] + 199
40  com.apple.Foundation          	0x00007fff321dd470 NSKeyValueNotifyObserver + 335
41  com.apple.Foundation          	0x00007fff322cc72c NSKeyValueDidChange + 437
42  com.apple.Foundation          	0x00007fff3236e441 NSKeyValueDidChangeWithPerThreadPendingNotifications + 146
43  com.apple.AppKit              	0x00007fff2d49cd36 -[NSApplication(NSApplicationAppearance_Internal) _observeValueForSystemAppearanceKeyPath:ofObject:change:] + 141
44  org.gnu.Emacs                 	0x00000001067ccf23 -[EmacsApp observeValueForKeyPath:ofObject:change:context:] + 184
45  com.apple.Foundation          	0x00007fff321dd470 NSKeyValueNotifyObserver + 335
46  com.apple.Foundation          	0x00007fff322cc72c NSKeyValueDidChange + 437
47  com.apple.Foundation          	0x00007fff321d01bc -[NSObject(NSKeyValueObservingPrivate) _changeValueForKeys:count:maybeOldValuesDict:maybeNewValuesDict:usingBlock:] + 741
48  com.apple.Foundation          	0x00007fff321fae65 -[NSObject(NSKeyValueObservingPrivate) _changeValueForKey:key:key:usingBlock:] + 68
49  com.apple.Foundation          	0x00007fff32218e6f _NSSetObjectValueAndNotify + 269
50  com.apple.AppKit              	0x00007fff2d3c04d8 -[NSSystemAppearanceProxy _systemAppearanceDidChange] + 256
51  com.apple.AppKit              	0x00007fff2d3c06d4 -[NSSystemAppearanceProxy _menuBarAppearanceChanged:] + 27
52  com.apple.CoreFoundation      	0x00007fff2fb6580f __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
53  com.apple.CoreFoundation      	0x00007fff2fb657a3 ___CFXRegistrationPost1_block_invoke + 63
54  com.apple.CoreFoundation      	0x00007fff2fb65718 _CFXRegistrationPost1 + 372
55  com.apple.CoreFoundation      	0x00007fff2fb65384 ___CFXNotificationPost_block_invoke + 80
56  com.apple.CoreFoundation      	0x00007fff2fb354fd -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1554
57  com.apple.CoreFoundation      	0x00007fff2fb349a9 _CFXNotificationPost + 1351
58  com.apple.Foundation          	0x00007fff321b2786 -[NSNotificationCenter postNotificationName:object:userInfo:] + 59
59  com.apple.AppKit              	0x00007fff2d77ce30 -[NSWorkspaceNotificationCenter _menuBarDidChangeAppearance:] + 142
60  com.apple.CoreFoundation      	0x00007fff2fb6580f __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
61  com.apple.CoreFoundation      	0x00007fff2fb657a3 ___CFXRegistrationPost1_block_invoke + 63
62  com.apple.CoreFoundation      	0x00007fff2fb65718 _CFXRegistrationPost1 + 372
63  com.apple.CoreFoundation      	0x00007fff2fb65384 ___CFXNotificationPost_block_invoke + 80
64  com.apple.CoreFoundation      	0x00007fff2fb354fd -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1554
65  com.apple.CoreFoundation      	0x00007fff2fb349a9 _CFXNotificationPost + 1351
66  com.apple.CoreFoundation      	0x00007fff2fb65885 CFNotificationCenterPostNotificationWithOptions + 110
67  com.apple.SkyLight            	0x00007fff5efa0208 post_coordinated_distributed_notification + 205
68  com.apple.SkyLight            	0x00007fff5ee02f8f CGSPostLocalNotification + 430
69  com.apple.SkyLight            	0x00007fff5ee029cc (anonymous namespace)::notify_datagram_handler(unsigned int, CGSDatagramType, void*, unsigned long, void*) + 98
70  com.apple.SkyLight            	0x00007fff5ee06ba2 CGSDatagramReadStream::dispatch_next_main_queue_datagram() + 242
71  com.apple.SkyLight            	0x00007fff5f0378da invocation function for block in CGSDatagramReadStream::dispatch_main_queue_datagrams_async(dispatch_queue_s*, CGSDatagramReadStream*) + 54
72  libdispatch.dylib             	0x00007fff69bb36c4 _dispatch_call_block_and_release + 12
73  libdispatch.dylib             	0x00007fff69bb4658 _dispatch_client_callout + 8
74  libdispatch.dylib             	0x00007fff69bbfcab _dispatch_main_queue_callback_4CF + 936
75  com.apple.CoreFoundation      	0x00007fff2fbaee81 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
76  com.apple.CoreFoundation      	0x00007fff2fb6ec87 __CFRunLoopRun + 2028
77  com.apple.CoreFoundation      	0x00007fff2fb6de3e CFRunLoopRunSpecific + 462
78  com.apple.HIToolbox           	0x00007fff2e79aabd RunCurrentEventLoopInMode + 292
79  com.apple.HIToolbox           	0x00007fff2e79a7d5 ReceiveNextEventCommon + 584
80  com.apple.HIToolbox           	0x00007fff2e79a579 _BlockUntilNextEventMatchingListInModeWithFilter + 64
81  com.apple.AppKit              	0x00007fff2cde0039 _DPSNextEvent + 883
82  com.apple.AppKit              	0x00007fff2cdde880 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1352
83  com.apple.AppKit              	0x00007fff2cdd058e -[NSApplication run] + 658
84  org.gnu.Emacs                 	0x00000001067cc5fe -[EmacsApp run] + 317
85  org.gnu.Emacs                 	0x00000001067cb376 ns_select + 938
86  org.gnu.Emacs                 	0x000000010679b1bb wait_reading_process_output + 3405
87  org.gnu.Emacs                 	0x0000000106654d66 sit_for + 310
88  org.gnu.Emacs                 	0x00000001066f5924 read_char + 3269
89  org.gnu.Emacs                 	0x00000001066f35e0 read_key_sequence + 1250
90  org.gnu.Emacs                 	0x00000001066f2274 command_loop_1 + 865
91  org.gnu.Emacs                 	0x000000010675d6ef internal_condition_case + 84
92  org.gnu.Emacs                 	0x00000001066feeb2 command_loop_2 + 37
93  org.gnu.Emacs                 	0x000000010675d37a internal_catch + 74
94  org.gnu.Emacs                 	0x00000001067ff09b recursive_edit_1.cold.1 + 69
95  org.gnu.Emacs                 	0x00000001066f193b recursive_edit_1 + 217
96  org.gnu.Emacs                 	0x00000001066f1a45 Frecursive_edit + 226
97  org.gnu.Emacs                 	0x00000001066f0f6f main + 7543
98  libdyld.dylib                 	0x00007fff69c0dcc9 start + 1

@muffinmad, could you try the latest revision of this patch ? Hopefully that resolves your issues.

@muffinmad, could you try the latest revision of this patch ? Hopefully that resolves your issues.

Sure.

Just for the record, that was a single crash.

@muffinmad, any crashes to report? If not, I'll make a PR to the formulas that use it.

@ngquerol No crashes so far.