Red Hat Bugzilla – Bug 1345963
vidputs fails when CURRENT_SCREEN not set
Last modified: 2017-07-26 10:06:43 EDT
Description of problem:
The upgrade to ncurses 6 in F24 has stopped vidputs working if initscr/newterm has not been called because it has SP_FUNCS mode enabled which vidputs is replaced by a wrapper which calls vidputs_sp.
That wrapper creates a dummy screen locally if CURRENT_SCREEN is not set, and attaches the user's callback to that dummy screen. It then goes and passes CURRENT_SCREEN to vidputs though when it probably meant to pass sp which points either to CURRENT_SCREEN or to the local dummy.
Just fixing that is not a complete fix however, as the dummy screen is missing details that mean that vidputs_sp crashes when passed the dummy screen.
Version-Release number of selected component (if applicable):
CCing upstream maintainer.
I don't see it in my email from last year. However, as I understand it,
the report points out that if vidputs is called without initializing the
terminal, the library misbehaves. I'll improve that.
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NEWS entry for snapshot 20170624:
+ improve checks for low-level terminfo functions when the terminal
has not been initialized (Redhat #1345963).