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bug#26530: Emacs 24.5, 25; Lisp Interpreter Bug

From: Paul Eggert
Subject: bug#26530: Emacs 24.5, 25; Lisp Interpreter Bug
Date: Sun, 16 Apr 2017 12:34:07 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

Cody Rivera wrote:
I must have some emacs package that allows the form "(loop @body)" to be

Yes, evidently your problem involves some code that I don't have, which explains why I can't reproduce it. If you can provide a way to reproduce your problem (i.e., C-g does not work) then perhaps we can fix it.

I reran similar code with emacs -Q, and it turns out I can stop it.  After
about fifteen seconds, the buffer was populated with millions of lines
(about 300 million while composing my reply).  Clearly my mundane code was
running properly.

However, while running the code, my installed versions of Emacs remain
unresponsive until interrupted -- none of the GUI elements are responsive,
no command works except C-g, there is no terminal output, and there is
ultimately no indication that the program is running properly.

I misinterpreted (the lack of) a feature as a bug.

Yes, that's to be expected. Emacs is single-threaded, and if are running Lisp code it cannot respond to other keystrokes to run any other Lisp code; all you can do is interrupt it with C-g.

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