Adalbert Perbandt writes:
X Error of failed request: BadWindow (invalid Window parameter)
Major opcode of failed request: 25 (X_SendEvent)
Resource id in failed request: 0x8403484
Is there anything known about a possible workaround for this issue?
No. We're aware of the problem in 21.5, but we don't know what causes
it yet. This is the first report I've seen for 21.4, IIRC.
It's possible that an upgrade to 21.4.19 might make it less frequent.
There has been recent work on internal management of X windows, but I
don't recall whether any of it was after the release of 21.4.18.
Since it affects both trees, it's possible that it's related to
changes in X.org code, although it's more likely that it's due to our
internal window management code.
Please use M-x report-xemacs-bug so that we get more information about
your configuration, including versions of linked software.
We would also like to know the window manager you use and its
version. Similar traces in the past have been linked to window
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