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yank-last-arg with numeric argument doesn't work as intended in vi mode


From: Leo Alekseyev
Subject: yank-last-arg with numeric argument doesn't work as intended in vi mode
Date: Sun, 7 Jun 2020 21:46:27 -0700

With GNU readline 7.0 / bash 4.4.20(1) it appears to be impossible to
insert nth argument of a previous command in vi mode.

According to the manual, setting a numeric argument (e.g. Alt-1) and
repeatedly invoking Alt-. should keep inserting nth argument from
preceding commands. For example, issuing

echo arg1 arg2
echo argA argB

and pressing Alt-1 Alt-. Alt-. inserts arg1 (first inserting argA,
then replacing with arg1).

However, the same sequence of operations fails in vi mode even when
the keys are bound appropriately. In particular, pressing Alt-1 Alt-.
Alt-. inserts argA arg2.

Subsequent invocation of Alt-. replace arg2 with the 2nd argument of
the preceding command, i.e. readline is now behaving as if the numeric
argument were 2.

This certainly seems like buggy/out-of-spec behavior, is there a known
workaround?

This is observed in bash 4.4.20(1) with ~/.inputrc containing the following:

set editing-mode vi

set keymap vi-insert
"\e.":yank-last-arg

set keymap vi-command
"\e.":yank-last-arg



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