Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!ZERMATT.LCS.MIT.EDU!RWS
From: RWS@ZERMATT.LCS.MIT.EDU (Robert Scheifler)
Newsgroups: comp.windows.x
Subject: why twm gets "sequence lost"
Message-ID: <19880608012923.5.RWS@KILLINGTON.LCS.MIT.EDU>
Date: 8 Jun 88 01:29:00 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 4

The Xlib manual, section 8.12.2, under XSetErrorHandler sez:
    "However, the error handler should not perform any operations
    (directly or indirectly) on the display."
twm violates this, breaking internal Xlib invariants.