in emacs, input seems to become readonly sometimes

[mikestillman]

Try the following (in M2 1.16) in emacs:

   f = () -> (
       << "hi there\n\nhi there 2\n" << flush;
       sleep 100
       )
   f()

And then try typing anything into the emacs M2 buffer, including trying to CNTRL-C it... It responds with Text is read-only. Once the prompt comes back, one can access the buffer again.

@mahrud , @DanGrayson Is this related to a recent change?

[DanGrayson]

This is #3, presumably. I have a fix.

A work-around is to use 1.15's setupEmacs.

[mahrud]

This doesn't happen to me. I'm using 1.16's M2.el on Emacs 26.3. What version did you try it on?

[mikestillman]

I'm using 1.16 M2.el on emacs 26.3 too. I do have lots of stuff in my .emacs file. I suppose that something else could be interacting poorly. But it does work with 1.15, I'm pretty sure.

[mahrud]

Ah, I think it's because I'm using an uncommitted version of M2-symbols.el.in, since I was in the middle of fixing some issues in M2-mode, and one of the changes was to the regexp used for the prompt:

(defconst M2-comint-prompt-regexp "^\\([ \t]*\\(i*[1-9][0-9]* :\\|o*[1-9][0-9]* =\\) \\)?"

The outer (...)? makes this match the empty line. I'll fix it soon.

[mikestillman]

Additionally, typing CTRL-D in the *M2* buffer ends the M2 process, and I get in the minibuffer the phrase: error in process sentinel: Text is read-only (it does stop the process too, without any notice to that effect).

[mikestillman]

The same issue, I think: If I am in a shell buffer, and type CTRL-C on a blank line, it also won't interrupt.

[DanGrayson]

I've just pushed the fix to the development branch, and it involves the M2-emacs submodule, so do git submodule update to get the latests. (Doing git status will inform you of the need.)

Test it out and let me know.