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bug#40152: 27.0.90; icomplete vs recursive prompts
From: |
Kévin Le Gouguec |
Subject: |
bug#40152: 27.0.90; icomplete vs recursive prompts |
Date: |
Thu, 04 Feb 2021 19:39:41 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
OK, I think I have a simpler reproducer.
>From emacs -Q:
#+begin_src elisp
(icomplete-mode)
(setq enable-recursive-minibuffers t)
(completing-read
"Prompt #1? "
(lambda (&rest _args)
(read-string "Prompt #2? ")
(list "foo" "bar" "baz")))
#+end_src
Current result:
1. prompt #1 appears,
2. I type in a letter, say "x",
3. prompt #2 immediately appears, hijacking prompt #1,
4. I type in another letter, say "y",
5. prompt #1 returns, hijacking prompt #2; the "x" I typed is there,
6. I type in another letter, say "z",
7. prompt #2 returns, hijacking prompt #1; the "y" I typed is not there.
Expected result:
1. prompt #1 appears,
2. I type in a letter, say "x",
3. prompt #2 immediately appears, hijacking prompt #1,
4. I type in another letter, say "y",
5. *PROMPT #2 REMAINS* until I hit RET/C-j/C-g…
6. prompt #1 returns; the "x" I typed is there.
(If icomplete-show-matches-on-no-input is set, I guess I'd expect Emacs
to go straight to step 3, with prompt #1 empty on step 6.)
To summarize my previous messages:
- In addition to this synthetic recipe, I have two fairly annoying
reproducers:
1. xref-find-definitions bounces back between the identifier prompt
and the TAGS table prompt (when there are no tags at point and
xref falls back to the etags backend).
2. TRAMP bounces back between the filename prompt and the
.authinfo.gpg passphrase prompt.
- Even after hours of debugging, I still feel out of my depth with the
completion code; I'd really appreciate some help. I don't mind
debugging some more, but at this point I'd need a clue where to look.
(Since I feel like my synthetic reproducer is small enough, I'm boldly
CC'ing folks I imagine to be the most familiar with the completion
framework and/or icomplete; I apologize for the forwardness.)
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