bug#46373: 28.0.50; "Not in most nested minibuffer" error when selecting date in calendar

[Sébastien Le Callonnec]

Hi,

When picking a date in a calendar to insert a date in an Org mode file,
the following error appears:

Debugger entered--Lisp error: (error "Not in most nested minibuffer")
signal(error ("Not in most nested minibuffer"))
error("%s" "Not in most nested minibuffer")
exit-minibuffer()
org-calendar-select-mouse((mouse-1 (#<window 3 on *Calendar*> 479 (160 . 
111) 1580058 nil 479 (17 . 6) nil (7 . 3) (9 . 18))))
funcall-interactively(org-calendar-select-mouse (mouse-1 (#<window 3 on 
*Calendar*> 479 (160 . 111) 1580058 nil 479 (17 . 6) nil (7 . 3) (9 . 
18))))
call-interactively(org-calendar-select-mouse nil nil)
command-execute(org-calendar-select-mouse)
read-string("Date+time [2021-02-07]: " nil org-read-date-history nil)
org-read-date(nil totime nil nil nil nil nil)
org-time-stamp(nil)
funcall-interactively(org-time-stamp nil)
call-interactively(org-time-stamp nil nil)
command-execute(org-time-stamp)


Here are the steps to reproduce the issue following `emacs -Q`:

M-: (setq debug-on-error t) RET
C-x C-f /tmp/example.org RET
C-c .
Click on date in calendar


git bisect indicates commit c7c154bb5756e0ae71d342c5d8aabf725877f186 is 
the first bad commit




In GNU Emacs 28.0.50 (build 2, x86_64-pc-linux-gnu, GTK+ Version 
3.24.23, cairo version 1.16.0)
of 2021-02-07 built on pyjama
Repository revision: 7c5938ad7d8884d03471e2395937e11611faadb9
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12009000
System Description: Ubuntu 20.10

Configured using:
'configure --with-imagemagick --with-rsvg --with-gnutls
--with-mailutils --with-harfbuzz'

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ IMAGEMAGICK
JPEG LCMS2 LIBSELINUX LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PNG RSVG
SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM GTK3 ZLIB

Important settings:
value of $LC_MONETARY: en_IE.UTF-8
value of $LC_NUMERIC: en_IE.UTF-8
value of $LC_TIME: en_IE.UTF-8
value of $LANG: en_GB.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix

Major mode: Org

Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug sendmail help-fns radix-tree cl-print
debug backtrace mule-util cal-move org-element avl-tree generator ol-eww
eww xdg url-queue thingatpt mm-url ol-rmail ol-mhe ol-irc ol-info
ol-gnus nnselect gnus-search eieio-opt cl-extra help-mode speedbar
ezimage dframe gnus-art mm-uu mml2015 mm-view mml-smime smime dig
gnus-sum shr kinsoku svg dom browse-url url url-proxy url-privacy
url-expand url-methods url-history url-cookie url-domsuf url-util
url-parse url-vars mailcap gnus-group gnus-undo gnus-start gnus-dbus
dbus xml gnus-cloud nnimap nnmail mail-source utf7 netrc nnoo parse-time
gnus-spec gnus-int gnus-range message rmc puny rfc822 mml mml-sec epa
derived epg epg-config mm-decode mm-bodies mm-encode mail-parse rfc2231
mailabbrev gmm-utils mailheader gnus-win gnus nnheader gnus-util rmail
rmail-loaddefs auth-source cl-seq eieio eieio-core cl-macs
eieio-loaddefs password-cache json map rfc2047 rfc2045 ietf-drums
text-property-search seq byte-opt gv bytecomp byte-compile cconv
mail-utils mm-util mail-prsvr wid-edit ol-docview doc-view jka-compr
image-mode exif dired dired-loaddefs ol-bibtex bibtex iso8601 ol-bbdb
ol-w3m org ob ob-tangle ob-ref ob-lob ob-table ob-exp org-macro
org-footnote org-src ob-comint org-pcomplete pcomplete comint ansi-color
ring org-list org-faces org-entities time-date subr-x noutline outline
easy-mmode org-version ob-emacs-lisp ob-core ob-eval org-table ol
org-keys org-compat advice org-macs org-loaddefs format-spec find-func
cal-menu easymenu calendar cal-loaddefs cl-loaddefs cl-lib iso-transl
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list replace newcomment text-mode elisp-mode
lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch
timer select scroll-bar mouse jit-lock font-lock syntax facemenu
font-core term/tty-colors frame minibuffer cl-generic cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese composite charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice button loaddefs faces cus-face macroexp files
window text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote threads dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting
cairo move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 177702 17376)
(symbols 48 19558 2)
(strings 32 67165 2399)
(string-bytes 1 2243425)
(vectors 16 33900)
(vector-slots 8 381904 26478)
(floats 8 243 156)
(intervals 56 636 0)
(buffers 984 17))