It's not a bug in dialog: when dialog's in the background, it relies
upon the terminal modes remaining as-is. bash resets the terminal
modes, breaking some of the optimizations used by ncurses. That's going
to happen anytime you have two programs with different notions of what
the terminal's doing. A user recently asked about a similar case, where
it was possible to fool bash by changing the terminal mode to raw in the
script (so that bash can detect it).
** Changed in: dialog (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1502538
Title:
dialog displays misplaced characters with tailboxbg
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