Hello Alan,

Thank you for your response. Apologies for the ambiguous steps. Please find
more detailed information below:

Here are the steps:

1. Open a file in c++-mode (e.g. emacs -Q test.cc).

2. Add 100 lines of some string (e.g. the word "bar" on every line for 100
lines, no quotes in the actual file):

bar
bar
bar
bar
...
bar

3. Add a unique string to line 101 (e.g. the word "foo", no quotes in the
actual file).

bar
bar
bar
bar
...
bar
foo
<INCLUDE NEWLINE AT END OF FILE>

4. Close Emacs

5. Open up the file again: emacs -Q test.cc

6. Replace the unique string with some other string: M-x query-replace
<RET> foo <RET> bar <RET>

7. You should hit: Args out of range: #<buffer test.cc>, 0, 1

Here's the backtrace when using debug-on-error:

Debugger entered--Lisp error: (args-out-of-range #<buffer test.cc> 0 1)
  buffer-substring-no-properties(0 1)
  perform-replace("foo" "a" t nil nil nil nil nil nil nil nil)
  query-replace("foo" "a" nil nil nil nil nil)
  funcall-interactively(query-replace "foo" "a" nil nil nil nil nil)
  call-interactively(query-replace nil nil)
  command-execute(query-replace)

I also wanted to add that I tried reproducing with a file that looked like
the following, but did NOT see the issue then,
either with replacing "foo" (with quotes) or just foo (no quotes):

"bar"
"bar"
"bar"
...
"bar"
"foo"

Even though I'm using "emacs -Q", could it still be interacting with some
of the packages I have installed?

Here's the list of packages I have installed under $HOME/.emacs.d/elpa:

avy-0.3.0
company-20181105.2312
company-lean-20171102.1454
dash-20180910.1856
dash-functional-20180107.1618
epl-20180205.2049
f-20180106.922
flycheck-20181127.1510
gnupg
go-mode-1.3.1
haskell-mode-13.16
lean-mode-20180906.1645
pkg-info-20150517.1143
rust-mode-20181008.1628
s-20180406.808

Best,
Jayden


On Sat, Jun 22, 2019 at 6:25 AM Alan Mackenzie <acm@muc.de> wrote:

> Hello, Jayden.
>
> In article <mailman.612.1561158667.10840.bug-gnu-emacs@gnu.org> you wrote:
> > [-- text/plain, encoding 7bit, charset: UTF-8, 97 lines --]
>
> [ .... ]
>
> > Fill a *.cc file with 100 lines of any string (e.g. "bar"). At line 101
> > write a unique string (e.g. "foo").
>
> Does your file look like:
>
> bar
> bar
> bar
> ...
> ...
> bar
> foo
>
> ?  Or does it look like:
>
> "bar"
> "bar"
> "bar"
> ...
> ...
> "bar"
> "foo"
>
> ?
>
> > Close the file and reopen (emacs -Q).
>
> OK.
>
> > and perform search-and-replace on "foo" (replacing with any other
> string).
>
> What, precisely, did you do to attempt this "search-and-replace"?  With
> emacs-26.2, after emacs -Q, I did
>
>     C-x C-f test.cc
>
> , followed by
>
>     M-% foo <CR> FOO
>
> , in both possibilities for the file (see above), yet could not
> reproduce the error.  The replacement command simply worked for me.
>
> > At this point you should see "Args out of range: #<buffer test.cc>, 0,
> 1".
>
> This is what I don't see.  :-(  At least, not yet.
>
> [ .... ]
>
> --
> Alan Mackenzie (Nuremberg, Germany).
>
>