Option "imdisable" affects option "keymap".

[Deni672]

Option "imdisable" affects option "keymap".

Steps to reproduce.

Create vim from source code.
My version is 8.2 with patches 1-1127.

Run command

VIMRUNTIME=/not-existing-dir \
./path-to-git-vim/src/vim \
-u NONE \
-U NONE \
-i NONE \
--noplugin \
-n \
-N \
-g

In vim type command

:source ./path-to-git-vim/runtime/keymap/russian-jcuken.vim

and press "enter".

Go to insert mode (press "i").
Text in status line: "-- INSERT --".
Press "C-6".
Text in status line: "-- INSERT (ru) --".

Press "," and ".".
Result [1]: type text "бю" (expected).

Press "S-," (hold "shift" key and press comma key) and "S-." (hold "shift" key and press dot key).
Result [1]: type text "БЮ" (expected).

Exit from insert mode (press "esc").

Type command

:set imdisable

and press "enter".

Go to insert mode (press "i").
Text in status line: "-- INSERT --".
Press "C-6".
Text in status line: "-- INSERT (ru) --".

Press "," and "." again.
Result [2]: type text "бю" (expected).

Press "S-," and "S-." again.
Result [2]: type text "<>" (unexpected) (bug).
Expected result: type text "БЮ" (not "<>").

Not only "S-,", "S-." affected. Other key combinations also affected.

If type command

:set noimdisable

and press enter, when behavior is like [1].