bug#62575: 29.0.60; Tabs are not showing the right names of the buffers

[Claudio Grondi]

Along with this I have also noticed following problem:

1. ~ $ emacs -Q
2. Menu -> Options -> Show/Hide -> Tab Bar (gives Tab *scratch*)
3. resize the Emacs window to a small one, but large enough to show some Tab 
labels
3. 1x click on rightmost * in the Tab Bar to create a new Tab

The bug: No new Tab will be created and the minibuf and *Messages* show:

  split-window: Window #<window 3 on *Messages*> too small for splitting

Is it worth a new bug number?


On 4/1/23 13:38, Ruijie Yu wrote:

> Claudio Grondi <claudio.grondi@freenet.de> writes:
>
> > Below the steps required to reproduce the bug:
> >
> > 1. ~ $ emacs -Q
> > 2. Menu -> Options -> Show/Hide -> Tab Bar (gives Tab *scratch*)
> > 3. 1x click on rightmost * in the Tab Bar to create a new Tab (gives 2x
> > *scratch* Tabs)
> > 4. With the rightmost (second) Tab open ~/.emacs (gives 1x *scratch* and 1x
> > .emacs Tabs)
> > 5. 2x click on rightmost * in the Tab Bar to create twp new Tabs (gives 1x
> > *scratch* and 3x .emacs Tabs)
> > 6. with rightmost Tab active kill the .emacs buffer [C-x k] (the Tabs label
> > turns  to *scratch the other two Tabs labeled .emacs keep their labels, so there
> > are 1x *scratch*, 2x .emacs, 1x *scratch* Tabs)
> > 7. *click the second Tab labeled* .emacs' (result: the label of the Tab turns to
> > *Messages*. the Tab Bar shows *scratch* *Messages* .emacs *scratch* )
> >
> > The bug: the third Tab still keeps its  .emacs  label, the click on the second
> > Tab labeled  .emacs  did not show the .emacs file, but the buffer *Messages*.
> Can reproduce in 30 (db7e95531ac36ae842787b6c5f2859d0642c78cc) and 28.2
> (tagged) -- so even if this is a regression, it would not be a recent
> one.
>
> Essentially, the reported bug can be summarized as: the tab names on a
> tab bar do not respond to situations where a buffer has been deleted.
>
> In addition, I noticed that this behavior extends to renaming a buffer
> as well (tried it in 30, not in 28.2).  The reproducer is to replace (6)
> above with the following, and observe that the other tabs do not update
> their names until you click on them.
>
>      C-x x r hello RET