Subject: 28.0.90; Emacs 28 regression: Can't edebug inline functions
From: Philipp Stephani <[email-masked]>
To: [email-masked]
Date: Fri, 07 Jan 2022 09:38:47 +0100
List-Id: <debbugs-submit.debbugs.gnu.org>

Visit the file lisp/json.el, navigate to the `json-advance' inline
function, and hit C-u C-M-x.  This fails with a backtrace:

Debugger entered--Lisp error: (void-function backquote-form)
  backquote-form((((forward-char ,n)) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958))
  #f(compiled-function (head cursor) #<bytecode 0x1918f171823d32ac>)(inline-quote (((forward-char ,n)) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958))
  edebug-list-form((((forward-char ,n)) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958))
  edebug-form((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959))
  edebug-match-form((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959))
  edebug-match-symbol((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) form)
  edebug-match-one-spec((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) form)
  edebug-match-specs((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (form) #f(compiled-function (c s rh) #<bytecode -0x1c9964082b0c95b6>))
  edebug-&optional-wrapper((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (form) #f(compiled-function (c s rh) #<bytecode -0x1c9964082b0c95b6>))
  #f(compiled-function (_ cursor specs) #<bytecode 0x9a39e71a2be8e1d>)(&rest (((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (form))
  apply(#f(compiled-function (_ cursor specs) #<bytecode 0x9a39e71a2be8e1d>) &rest ((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (form)))
  edebug--match-&-spec-op(&rest (((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (form))
  edebug-match-specs((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (&rest form) edebug-match-specs)
  edebug-match((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (&rest form))
  edebug-match-def-body((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959))
  edebug-match-symbol((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) def-body)
  edebug-match-one-spec((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) def-body)
  edebug-match-specs((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (def-body) edebug-match-specs)
  edebug-match-specs((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) ([&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body) edebug-match-specs)
  edebug-match-specs((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) ([&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body) edebug-match-specs)
  edebug-match-specs((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (lambda-doc [&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body) edebug-match-specs)
  edebug-match-specs((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (lambda-list lambda-doc [&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body) edebug-match-specs)
  edebug-match-specs((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) (name lambda-list lambda-doc [&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body) edebug-match-specs)
  edebug-match-specs((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) ("define-inline" name lambda-list lambda-doc [&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body) edebug-match-specs)
  edebug-match-sublist((((inline-quote (forward-char ,n))) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959) ("define-inline" name lambda-list lambda-doc [&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body))
  edebug-match-list((((define-inline json-advance (&optional n) "Advance N characters forward, or 1 character if N ..." (inline-quote (forward-char ,n)))) (8734 (8735 . 8748) (8749 . 8761) (8762 (8763 . 8772) (8773 . 8774) . 8775) (8778 . 8923) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959)) ("define-inline" name lambda-list lambda-doc [&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body))
  edebug-match-one-spec((((define-inline json-advance (&optional n) "Advance N characters forward, or 1 character if N ..." (inline-quote (forward-char ,n)))) (8734 (8735 . 8748) (8749 . 8761) (8762 (8763 . 8772) (8773 . 8774) . 8775) (8778 . 8923) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959)) ("define-inline" name lambda-list lambda-doc [&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body))
  edebug-match-specs((((define-inline json-advance (&optional n) "Advance N characters forward, or 1 character if N ..." (inline-quote (forward-char ,n)))) (8734 (8735 . 8748) (8749 . 8761) (8762 (8763 . 8772) (8773 . 8774) . 8775) (8778 . 8923) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959)) (("define-inline" name lambda-list lambda-doc [&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body)) edebug-match-specs)
  edebug-match((((define-inline json-advance (&optional n) "Advance N characters forward, or 1 character if N ..." (inline-quote (forward-char ,n)))) (8734 (8735 . 8748) (8749 . 8761) (8762 (8763 . 8772) (8773 . 8774) . 8775) (8778 . 8923) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959)) (("define-inline" name lambda-list lambda-doc [&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body)))
  edebug-make-form-wrapper((((define-inline json-advance (&optional n) "Advance N characters forward, or 1 character if N ..." (inline-quote (forward-char ,n)))) (8734 (8735 . 8748) (8749 . 8761) (8762 (8763 . 8772) (8773 . 8774) . 8775) (8778 . 8923) (8926 (8927 . 8939) (8940 (8941 . 8953) (8954 (8954 . 8955) (8955 . 8956) . 8956) . 8957) . 8958) . 8959)) 8734 8958 (("define-inline" name lambda-list lambda-doc [&optional ("declare" def-declarations)] [&optional ("interactive" &optional [&or stringp def-form] &rest symbolp)] def-body)))
  edebug-read-and-maybe-wrap-form1()
  edebug-read-and-maybe-wrap-form()
  edebug--read(read #<buffer json.el>)
  apply(edebug--read read #<buffer json.el>)
  #f(advice-wrapper :around read edebug--read)(#<buffer json.el>)
  elisp--eval-defun()
  #f(compiled-function (edebug-it) "Evaluate the top-level form containing point, or after point.\n\nIf the current defun is actually a call to `defvar' or `defcustom',\nevaluating it this way resets the variable using its initial value\nexpression (using the defcustom's :set function if there is one), even\nif the variable already has some other value.  (Normally `defvar' and\n`defcustom' do not alter the value if there already is one.)  In an\nanalogous way, evaluating a `defface' overrides any customizations of\nthe face, so that it becomes defined exactly as the `defface' expression\nsays.\n\nIf `eval-expression-debug-on-error' is non-nil, which is the default,\nthis command arranges for all errors to enter the debugger.\n\nWith a prefix argument, instrument the code for Edebug.\n\nIf acting on a `defun' for FUNCTION, and the function was\ninstrumented, `Edebug: FUNCTION' is printed in the echo area.  If not\ninstrumented, just FUNCTION is printed.\n\nIf not acting on a `defun', the result of evaluation is displayed in\nthe echo area.  This display is controlled by the variables\n`eval-expression-print-length' and `eval-expression-print-level',\nwhich see." (interactive "P") #<bytecode -0x144badc3f8c191f7>)(nil)
  edebug--eval-defun(#f(compiled-function (edebug-it) "Evaluate the top-level form containing point, or after point.\n\nIf the current defun is actually a call to `defvar' or `defcustom',\nevaluating it this way resets the variable using its initial value\nexpression (using the defcustom's :set function if there is one), even\nif the variable already has some other value.  (Normally `defvar' and\n`defcustom' do not alter the value if there already is one.)  In an\nanalogous way, evaluating a `defface' overrides any customizations of\nthe face, so that it becomes defined exactly as the `defface' expression\nsays.\n\nIf `eval-expression-debug-on-error' is non-nil, which is the default,\nthis command arranges for all errors to enter the debugger.\n\nWith a prefix argument, instrument the code for Edebug.\n\nIf acting on a `defun' for FUNCTION, and the function was\ninstrumented, `Edebug: FUNCTION' is printed in the echo area.  If not\ninstrumented, just FUNCTION is printed.\n\nIf not acting on a `defun', the result of evaluation is displayed in\nthe echo area.  This display is controlled by the variables\n`eval-expression-print-length' and `eval-expression-print-level',\nwhich see." (interactive "P") #<bytecode -0x144badc3f8c191f7>) t)
  apply(edebug--eval-defun #f(compiled-function (edebug-it) "Evaluate the top-level form containing point, or after point.\n\nIf the current defun is actually a call to `defvar' or `defcustom',\nevaluating it this way resets the variable using its initial value\nexpression (using the defcustom's :set function if there is one), even\nif the variable already has some other value.  (Normally `defvar' and\n`defcustom' do not alter the value if there already is one.)  In an\nanalogous way, evaluating a `defface' overrides any customizations of\nthe face, so that it becomes defined exactly as the `defface' expression\nsays.\n\nIf `eval-expression-debug-on-error' is non-nil, which is the default,\nthis command arranges for all errors to enter the debugger.\n\nWith a prefix argument, instrument the code for Edebug.\n\nIf acting on a `defun' for FUNCTION, and the function was\ninstrumented, `Edebug: FUNCTION' is printed in the echo area.  If not\ninstrumented, just FUNCTION is printed.\n\nIf not acting on a `defun', the result of evaluation is displayed in\nthe echo area.  This display is controlled by the variables\n`eval-expression-print-length' and `eval-expression-print-level',\nwhich see." (interactive "P") #<bytecode -0x144badc3f8c191f7>) t)
  eval-defun(t)
  eval-defun((4))
  funcall-interactively(eval-defun (4))
  call-interactively(eval-defun nil nil)
  command-execute(eval-defun)

This is a regression from Emacs 27 and should therefore be fixed on the
release branch.

In GNU Emacs 28.0.90 (build 12, x86_64-pc-linux-gnu, GTK+ Version 3.24.30, cairo version 1.16.0)
 of 2022-01-05
Repository revision: c0cfbca311e6e07e9f8b9c1c9d0e2fe9792cd08c
Repository branch: emacs-28
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Debian GNU/Linux rodete

Configured using:
 'configure --enable-gcc-warnings=warn-only
 --enable-gtk-deprecation-warnings --without-pop --with-mailutils
 --enable-checking=all --enable-check-lisp-object-type --with-modules
 'CFLAGS=-O0 -ggdb3''

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

Important settings:
  value of $LC_TIME: en_DK.utf8
  value of $LANG: en_US.utf8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-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
  indent-tabs-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug sendmail phst skeleton edmacro kmacro
pcase ffap thingatpt url url-proxy url-privacy url-expand url-methods
url-history url-cookie url-domsuf url-util url-parse url-vars mailcap rx
message rmc dired dired-loaddefs rfc822 mml mml-sec epa derived epg
rfc6068 epg-config gnus-util rmail rmail-loaddefs auth-source cl-seq
eieio eieio-core cl-macs eieio-loaddefs password-cache json map
time-date mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047
rfc2045 mm-util ietf-drums mail-prsvr mailabbrev mail-utils gmm-utils
mailheader gnutls puny elp dbus xml subr-x seq byte-opt gv bytecomp
byte-compile cconv compile text-property-search comint ansi-color ring
cl-loaddefs cl-lib iso-transl tooltip eldoc paren electric uniquify
ediff-hook vc-hooks lisp-float-type elisp-mode 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 lisp-mode prog-mode register
page tab-bar menu-bar rfn-eshadow isearch easymenu timer select
scroll-bar mouse jit-lock font-lock syntax 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 emoji-zwj 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
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 69569 7335)
 (symbols 48 8528 3)
 (strings 32 24812 2251)
 (string-bytes 1 802359)
 (vectors 16 15668)
 (vector-slots 8 207469 19157)
 (floats 8 29 44)
 (intervals 56 228 0)
 (buffers 992 11))

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