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bug#36988: 26.2; Error "Non-hex digit used for Unicode escape" is not to
From: |
Drew Adams |
Subject: |
bug#36988: 26.2; Error "Non-hex digit used for Unicode escape" is not too helpful |
Date: |
Fri, 9 Aug 2019 09:25:01 -0700 (PDT) |
emacs -Q
Put this text in *scratch*, then move point to bob:
"\u2"
Then evaluate (read (current-buffer)). You get this error:
Debugger entered--Lisp error: (error "Non-hex digit used for Unicode escape")
read(#<buffer *scratch*>)
eval((read (current-buffer)) nil)
eval-expression((read (current-buffer)) nil nil 127)
funcall-interactively(eval-expression (read (current-buffer)) nil nil 127)
call-interactively(eval-expression nil nil)
command-execute(eval-expression)
Dunno what the right fix/enhancement is, but this error message does not
seem very helpful in this case.
FWIW, I stumbled on this when code tried to read some Lisp code that
contained an MS Windows absolute file name where the backslashes were
not escaped, such as "C:\Users\foo.html". It would have been nice if a
better error message could have been presented to the user in such a
case.
Perhaps there could be some way to point more or less to the offensive
"Non-hex digit used for Unicode escape"? In this case, the offense was
apparently committed by the \u.
In GNU Emacs 26.2 (build 1, x86_64-w64-mingw32)
of 2019-04-13
Repository revision: fd1b34bfba8f3f6298df47c8e10b61530426f749
Windowing system distributor `Microsoft Corp.', version 10.0.17763
Configured using:
`configure --without-dbus --host=x86_64-w64-mingw32
--without-compress-install 'CFLAGS=-O2 -static -g3''
- bug#36988: 26.2; Error "Non-hex digit used for Unicode escape" is not too helpful,
Drew Adams <=