Weird interaction with ivy-mode and js-mode

[bsuh]

Here's a video of it https://youtu.be/1l9FWjP6ass

1. Download this Javascript file https://code.jquery.com/jquery-1.12.4.js
2. Install ivy
3. Enable ivy-mode
4. Open jquery file
5. Start a Lisp eval and type in "(setq-default js-indent-le", press TAB, it completes correctly to js-indent-level
6. Scroll down
7. Start a Lisp eval and type in "(setq-default js-indent-le", press TAB, it completes incorrectly to js-indent-lejs-indent-level

[abo-abo]

I can't reproduce on Emacs 25. What's your Emacs version?

[bsuh]

GNU Emacs 24.5.1 (x86_64-apple-darwin15.4.0, Carbon Version 157 AppKit 1404.46)
 of 2016-05-08 on Brians-MacBook-Pro.local

[abo-abo]

Can you reliably reproduce this bug each time? I recall getting it a few times on extremely slow hardware (shared remote system, huge ping). But I don't remember this happening on any reasonably fast system.

[bsuh]

I reproduce it 100% after scrolling. The file is on my local filesystem.

[bsuh]

Interestingly enough I can't reproduce on emacs 24.5.1 running on Ubuntu.

[abo-abo]

Thanks for the detailed report. For some reason, I could not reproduce it on my config. But with emacs-24.5 -Q indeed I was able to reproduce. Please check.

[bsuh]

It is working correctly for me now. Thanks for the quick fix. :)

The fix for this issue removes the prefix on completion:

In M-x shell:

$ tree
.
└── directory
    └── file

2 directories, 1 file
$ ls directory/fi<TAB>    (->)
$ ls file

I'm not able to reproduce the original issue here, so not sure what a better fix might be.

[abo-abo]

@thwg, thanks. I'm reverting the previous commit.

@bsuh, please test the new fix.

[bsuh]

@abo-abo The new fix is still working correctly for me.

[bsuh]

@abo-abo Ran into another bug now.

1. Open emacs
2. Start Lisp eval and type in (setq-local tab-indent and then press TAB
3. Completes to (setqtab-always-indent