Migration blocker analysis for golang-defaults 2:1.27~0ubuntu1 in
stonking-proposed:

update_excuses blocks it with "golang/amd64 in main cannot depend on
golang-1.27 in universe" (and -go/-src/-doc).

What happened (from 
https://launchpad.net/ubuntu/+source/golang-1.27/+publishinghistory):
1. golang-1.27 rc1/rc2/rc3 were auto-synced from Debian sid into stonking as 
universe; rc3 was later promoted to main.
2. 2026-08-24: 1.27.0-1 (final) was copied from Debian sid by hand; the copy 
inherited universe placement, superseding the main rc3.
3. 2026-08-25: 1.27.0-1 was briefly published in release/main and superseded 
back to universe ~25s later — i.e. the override machinery (per 
component-mismatches "movements to universe") demoted it because, per the 
seeds, nothing currently pulls golang-1.27 into main. And the seeds can't pull 
it in until golang-defaults 1.27 migrates — which britney blocks precisely 
because golang-1.27 is in universe. Classic transition chicken-and-egg.

Resolution needed from an archive admin (same as every previous Go default 
transition):
* Promote golang-1.27, golang-1.27-go, golang-1.27-src, golang-1.27-doc to main 
in stonking (justification: golang-defaults 2:1.27~0ubuntu1 in proposed, MP 
509678).
* Then golang-defaults migrates; the apkverifier autopkgtest blocker is already 
fixed in release (-11ubuntu1); the remaining jacobsa-crypto/diskv autopkgtest 
regressions are the FFe copy-list rows (this bug) and clear when those land (or 
can be hinted).

After migration the seeds keep golang-1.27 in main and the auto-demoter
stops fighting it.

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https://bugs.launchpad.net/bugs/2164597

Title:
  FFe: Go 1.27 transition — regression fixes for reverse-build-
  dependencies

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