XPost: linux.debian.bugs.dist, linux.debian.policy 
 From: jspricke@debian.org 
  
 * Simon McVittie  [2025-04-08 10:33]: 
 >On Mon, 07 Apr 2025 at 14:08:23 +0200, Chris Hofstaedtler wrote: 
 >>it appears that currently there is no requirement for d/control to 
 >>stay the same before and after a build. However, many things require 
 >>this to be the case, and ftp-master also requires this in their 
 >>reject-faq [1]. 
 >> 
 >>[1] https://ftp-master.debian.org/REJECT-FAQ.html "debian/control breakage 
 #2" 
 > 
 >I am not a ftp team member, but I believe that point is specifically 
 >forbidding the set of built packages from changing during the build, 
 >and not the rest of debian/control: 
 > 
 >- regenerating debian/control during clean to rewrite "less important" 
 >fields like Uploaders or Description: reluctantly allowed 
  
 I think we should not allow this as it a number of tools run clean in 
 different situations and environments and that could result in a changed 
 d/control without the user noticing. Instead I would propose that clean 
 can generate a new d/control and fail if the content is different from 
 the current one. A number of packages do this already and I think it is 
 nice that there is an explicit error instead of an implicit change. 
  
 Over all I would appreciate a policy change as discussed here as I 
 invested already quiet some time to find the causes of random non 
 reproducible packages due to changes in d/control during the build. The 
 last one being #1118589. 
  
 Thanks for the work! 
  
 Jochen 
  
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