[issue27681] readline: consecutive rl_kill_word do not append

[Quentin Santos]

Quentin Santos added the comment:

I had not thought of checking gdb. Thanks for the information, I will look into 
that!

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[issue27681] readline: consecutive rl_kill_word do not append

[Martin Panter]

Martin Panter added the comment:

GDB also seems affected. The significance of this is it makes me suspect a bug 
in Readline’s callback-based “alternative interface”, as opposed to the simpler 
blocking interface. I know Python and GDB both use the callback API, and that 
Bash doesn’t.

You might have more luck taking this directly to Gnu Readline:
https://cnswww.cns.cwru.edu/php/chet/readline/rltop.html#Bugs

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nosy: +martin.panter
resolution:  -> third party

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[issue27681] readline: consecutive rl_kill_word do not append

[Quentin Santos]

New submission from Quentin Santos:

In readline, "kill" basically means "cut" and "yank", "paste. When killing 
twice in a row, it tries to group the kills. This can be shown to work with 
rl_unix_word_rubout; with the default emacs keymap, type:

>>> hello world

Then hit ^W (Control+W, rl_unix_word_rubout) twice, then ^Y (Control+Y, 
rl_yank). You should get back the two words.

Now, using rl_backward_kill_word (Meta ^H), twice, yanking only puts back the 
last killed word (here, "hello "). With rl_kill_word (^A for start of line, 
then ^D), twice, yanking also puts back only the last killed word (here, " 
world"). The expected behavior is to get back both words (there, "hello world").

The behavior appears in both CPython's REPL (2.7 and 3.5 at least) and in the 
readline module. Other programs (bash, pypy, irb) that use readline show the 
expected behavior, as well as zsh (with its own implementation of readline).

Granted, I can not really imagine and issue with a lowest priority.

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components: IO, Library (Lib)
messages: 271964
nosy: qsantos
priority: normal
severity: normal
status: open
title: readline: consecutive rl_kill_word do not append
versions: Python 2.7, Python 3.5

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