On 2021-11-18 at 20:06, Luca Boccassi wrote: > On Thu, 2021-11-18 at 16:23 -0500, Zack Weinberg wrote: > >> Luca Bocassi wrote:
>>> [merged /usr] is the default. It has been the default for >>> multiple releases of multiple distributions. All Ubuntu >>> installations that were not using this default are now forcibly >>> converted upon upgrade to 21.10. >>> >>> And yet nobody has actually seen [the file disappearance bug] >>> happen, to the best of my knowledge. >> >> I already explained why that doesn't prove the bug is a non-issue. >> To the contrary; it means there is an enormous installed base of >> systems where the bug is latent, waiting to cause problems under >> conditions which we can reasonably expect to occur shortly after >> the release of bookworm. Please do not make me repeat myself. >> >> zw > > I'm afraid you have not. Why would the release of bookworm make any > difference? There will be nothing new that hasn't already been > happening for years. I interpret Zack's comment as referring to this, which he said in https://lists.debian.org/debian-devel/2021/11/msg00205.html: > [P]eople aren't doing the package changes that trigger the bug, yet. > They can't, because that would break systems where /usr hasn't been > merged. If the bug is not fixed I expect it will start causing > problems in unstable *after* bookworm, since (as I understand the > current transition plan) bookworm+1 development is the earliest that > package maintainers may assume /bin is a symlink. IOW, I interpret him as disagreeing with you that "there will be nothing new that hasn't already been happening for years". Specifically, I parse him as arguing that: * to date, package maintainers have not yet begun moving already-packaged files from / to /usr/ (specifically because doing so would break systems that have not yet been migrated to merged-/usr, and Debian has not yet declared that such systems are unsupported), * after bookworm, package maintainers will start moving already-packaged files from / to /usr/, and * doing this will, in a non-negligible number of cases, trigger the bug to manifest on systems where that package is upgraded from a version where the move had not taken place to one where it has. (Zack, if I've gotten any of those wrong, please don't hesitate to correct me; I'll either apologize, or drop right back out of the discussion to go hide in a metaphorical hole, if not both.) Do you dispute any of those three points? If so, I'd be interested to know which one(s), and why. -- The Wanderer The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. -- George Bernard Shaw
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