#1033556 aptitude: "aptitude --show-summary=all-packages why ..." outputs the wrong package for Provides

Package:
aptitude
Source:
aptitude
Description:
terminal-based package manager
Submitter:
Vincent Lefevre
Date:
2023-03-27 11:45:03 UTC
Severity:
normal
#1033556#5
Date:
2023-03-27 11:40:56 UTC
From:
To:
Consider for instance:

$ aptitude why mailutils
i   muttprint Recommends mutt | sylpheed | gnus | xfmail | exmh | mail-reader
i A mailutils Provides   mail-reader

Here, one can see that mailutils provides mail-reader.

$ aptitude --show-summary=all-packages why mailutils
Packages requiring mailutils:
  muttprint R: mail-reader P<- mail-reader

But here one has mail-reader on both sides of "P<-". I suppose that
this should have been

  muttprint R: mail-reader P<- mailutils