* bug#54797: 27.1; "Old-style backquotes detected!" when there are no backquotes.
[not found] <318682461.5015086.1649439801318.ref@mail.yahoo.com>
@ 2022-04-08 17:43 ` Bruce Mardle via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-04-09 8:39 ` Lars Ingebrigtsen
0 siblings, 1 reply; 4+ messages in thread
From: Bruce Mardle via Bug reports for GNU Emacs, the Swiss army knife of text editors @ 2022-04-08 17:43 UTC (permalink / raw)
To: 54797
Short version:
Try to evaluate
'(, foo)
and you'll get (error "Old-style backquotes detected!"), which is
confusing considering that the expression doesn't contain a backquote!
Long version:
My code was evaluating happily yesterday (on what much have been an old
version of Emacs) but came up with that error on 27.1 today. It turned
out I had "(, " in a few places. They should have been "(* ", (OCR
failure) so I suppose I should thank the error message for helping me find
those... but it's a confusing message when source doesn't contain any
backquotes!
(I spent a while Googling to find out what was happening but only found
cases of people getting the error message whose code *did* contain a
backquote.)
In GNU Emacs 27.1 (build 1, x86_64-pc-cygwin)
of 2020-10-29 built on moufang2
Repository revision: 14432a33511ec750815c6f3b188f2c0d21b4cb22
Repository branch: master
Windowing system distributor 'Microsoft Corp.', version 6.1.7601
Recent messages:
Quit
Please type y or n, or C-v/M-v to scroll: y
View mode: type C-h for help, h for commands, q to quit.
Mark saved where search started
Mark set
Mark saved where search started
split-window: Attempt to split minibuffer window
command-execute: Command attempted to use minibuffer while in minibuffer
elisp--preceding-sexp: Old-style backquotes detected!
Making completion list...
Quit
Configured using:
'configure
--srcdir=/home/kbrown/src/cygpackages/emacs/emacs-27.1-2.x86_64/src/emacs-27.1
--prefix=/usr --exec-prefix=/usr --localstatedir=/var --sysconfdir=/etc
--docdir=/usr/share/doc/emacs --htmldir=/usr/share/doc/emacs/html -C
--with-w32 'CFLAGS=-ggdb -O2 -pipe -Wall -Werror=format-security
-Wp,-D_FORTIFY_SOURCE=2 -fstack-protector-strong
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-fdebug-prefix-map=/home/kbrown/src/cygpackages/emacs/emacs-27.1-2.x86_64/src/emacs-27.1=/usr/src/debug/emacs-27.1-2'
CPPFLAGS= LDFLAGS='
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PDUMPER LCMS2 GMP
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locale-coding-system: utf-8-unix
Major mode: Lisp Interaction
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Memory information:
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