bug#41239: GTK builds crashing in XTread_socket after deleting a frame

[martin rudalics]

>> This looks like yet another GTK specific crash where we apparently can't
>> do much.  But maybe someone can spot a pattern we could employ to avoid
>> the XTread_socket calls when deleting a frame.
>
> Isn't block_input inside Fdelete_frame what you want?

Do you mean the already existing one in delete_frame or adding a new
one?

> However, the first backtrace doesn't show Fdelete_frame in the
> backtrace, so I'm not sure what's going on there.

Neither do I.  Note some of the prerequisites:

- Tooltips must be GTK+ native ones - no crash with our tooltips.

- There must be two frames - no crash with just one frame.

- Deleting the frame must be via Alt-F4 - no crash with C-x 5 0.

martin