Bug in history management with multiple file buffers

[GoogleCodeExporter]

What steps will reproduce the problem?

Suppose I have 2 files A and B open in my vim using multiple file buffers
1. I open file A
2. I make a change in A
3. I save the change made to file A
4. Then I open the file buffer for B using bp.
5. Then if I go to the terminal by pressing Ctrl+Z
6. I go back to my file B by pressing fg in the terminal.
7. Then afterwards I go back to the buffer associated with file A
8. If I do undo the history of file A is not there.

What is the expected output? What do you see instead?

When I do undo I would want the history of file A to be still there

What version of the product are you using? On what operating system?

vim 7.3 Patches Included: 1-763, 765-831
OpenSuse 12.3

Please provide any additional information below.

Original issue reported on code.google.com by gu...@ascomp.ch on 11 Jul 2013 at 12:04

[GoogleCodeExporter]

This is expected behavior. By default Vim discards undo history when you 
abandon a buffer. You have a few options:

1. Set the 'hidden' option so Vim doesn't abandon the buffer.
2. Set the 'undofile' option so Vim saves the undo information in a file (also 
lets you quit Vim and relaunch Vim and keep the undo info).
3. Open a new window or tab for file B instead of switching buffers in the same 
window.

Original comment by fritzoph...@gmail.com on 11 Jul 2013 at 3:03

[GoogleCodeExporter]

Original comment by chrisbr...@googlemail.com on 30 Sep 2014 at 8:39

• Changed state: Invalid