A NOTE has been added to this issue. 
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https://austingroupbugs.net/view.php?id=1632 
====================================================================== 
Reported By:                kre
Assigned To:                
====================================================================== 
Project:                    Issue 8 drafts
Issue ID:                   1632
Category:                   Shell and Utilities
Type:                       Clarification Requested
Severity:                   Objection
Priority:                   normal
Status:                     New
Name:                       Robert Elz 
Organization:                
User Reference:              
Section:                    XCU 2.6.1 
Page Number:                2319-2320 
Line Number:                74775-74794 
Final Accepted Text:         
====================================================================== 
Date Submitted:             2023-01-31 00:58 UTC
Last Modified:              2023-02-06 01:46 UTC
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Summary:                    Tilde expansions with HOME="" or HOME value ending
in /
====================================================================== 

---------------------------------------------------------------------- 
 (0006144) mirabilos (reporter) - 2023-02-06 01:46
 https://austingroupbugs.net/view.php?id=1632#c6144 
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I’d prefer HOME= to be treated the same as HOME=/ wrt. expansion, and to
make sure that these are logical concatenations of pathnames, e.g. '/home'
+ 'foo' = '/home/foo' but '/' + 'foo' = '/foo'. This avoids both
“naïve” string concatenation and the problem of having to decide what
to do with an empty string; I consider an empty string to not be a valid
pathname and therefore not a valid expansion for a sole tilde.

I’m happy to change mksh to match; from a Debian perspective, we’re
entering soft freeze in a few days so a speedy decision would be welcome. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2023-01-31 00:58 kre            New Issue                                    
2023-01-31 00:58 kre            Name                      => Robert Elz      
2023-01-31 00:58 kre            Section                   => XCU 2.6.1       
2023-01-31 00:58 kre            Page Number               => 2319-2320       
2023-01-31 00:58 kre            Line Number               => 74775-74794     
2023-02-06 01:46 mirabilos      Note Added: 0006144                          
======================================================================


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