install/43298: [dM] 4.0.1 installer: partition overlap is fatal

[der Mouse <mouse%Rodents-Montreal.ORG@localhost>]

>Number:         43298
>Category:       install
>Synopsis:       [dM] 4.0.1 installer: partition overlap is a fatal error
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu May 13 04:25:00 +0000 2010
>Originator:     der Mouse
>Release:        NetBSD 4.0.1
>Organization:
        Dis-
>Environment:
System: NetBSD Tadpole-Anna.Rodents-Montreal.ORG 4.0.1 NetBSD 4.0.1 
(TADPOLE3GX) #6: Tue Apr 27 19:41:05 EDT 2010 
mouse%Tadpole-3GX.Rodents-Montreal.ORG@localhost:/home/mouse/kbuild/TADPOLE3GX 
sparc
Architecture: sparc
Machine: sparc
>Description:
        As part of trying to do the first install on a new drive, I had
        occasion to partition a disk with nontrivial partition overlap.
        The installer notices this, which is a good thing, but does not
        have any option for "yes, I know, it's deliberate, just shut up
        and leave it that way", which is a bad thing.  (See the
        port-sparc thread mentioned below for more.)

        For my own use, I just built a version of sysinst in which
        boringpart() always returns 1 (which effectively disables the
        partition overlap code).  This is probably not a good fix for
        general NetBSD use, though, which is why I'm not including it
        here; in the port-sparc thread mentioned below, Martin Husemann
        said something about fixing it (presumably in a way more
        appropriate for general use than my ugly hack).
>How-To-Repeat:
        Partition a disk with nontrivial partition overlap and try to
        install on it with the "use existing partition layout" option.
        See the port-sparc thread mentioned below for the details of my
        particular case.
>Fix:
        Presumably, give the "whoa, partitions overlap!" case a "yes, I
        know, that's my own lookout" option.

        The port-sparc thread mentioned above begins with my message

        Date: Tue, 11 May 2010 16:22:18 -0400 (EDT)
        From: der Mouse <mouse%Rodents-Montreal.ORG@localhost>
        Message-Id: 
<201005112022.QAA06517%Sparkle.Rodents-Montreal.ORG@localhost>
        Subject: Installer issues

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