install/54972: No Tmp Partition Created after Changing Size from Percentage to MB Input in 9.0 Installer

[dplassche%gmail.com@localhost]

>Number:         54972
>Category:       install
>Synopsis:       No Tmp Partition Created after Changing Size from Percentage to MB Input in 9.0 Installer
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Feb 16 18:50:00 +0000 2020
>Originator:     Dan Plassche
>Release:        9.0
>Organization:
>Environment:
>Description:
Encountered when doing a new install on a blank drive where I choose to set partition sizes in the NetBSD 9.0 installer.  Changed the /tmp partition size from 25% to 8192 MB.  The next screen with the partition layout and the subsequent newfs omitted the /tmp partition completely.
>How-To-Repeat:
Change /tmp partition from default 25% to a manually entered size value.
>Fix: