bin/49937: terminal handling bug in games/tetris

[paul%whooppee.com@localhost]

>Number:         49937
>Category:       bin
>Synopsis:       tetris(6) pause (keystroke p) handling error
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun May 31 07:40:00 +0000 2015
>Originator:     Paul Goyette
>Release:        NetBSD 7.99.15
>Organization:
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| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:       |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com    |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org  |
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>Environment:
System: NetBSD pokey.whooppee.com 7.99.15 NetBSD 7.99.15 (POKEY 2015-04-09 09:49:29) #1: Sun May  3 17:01:17 PHT 2015  paul%pokey.whooppee.com@localhost:/build/netbsd-local/obj/amd64/sys/arch/amd64/compile/POKEY amd64
Architecture: x86_64
Machine: amd64
>Description:
	Log in to NetBSD on a xterm and run tetris(6).  Use the keystroke
	'p' to pause the game.  Press the 'p' again and again.  for each
	additional 'p', a 'j' character is echoed on the lower-right and
	the bottom "boundary" line creeps toward the top of the screen.
	As a result, the display is completely garbled, and there does
	not seem to be any "repaint" capability.
	
>How-To-Repeat:
	See above
>Fix:
	I don't know how to fix.  However, I have verified that the
	image for tetris(6) supplied with NetBSD 6.1.5 does _not_
	exhibit the erroneous behavior.