[Updated] D9952: revlog: add a mechanism to verify expected file position before appending

[spectral (Kyle Lippincott)]

spectral added a comment.


  I'm unable to reproduce. I've run the test over 10,000 times (I added a `#testcases a b c d e f g h i j k l m n o p q r s t u v w x y z` so it ran 26 times each run, and I've run over 300 instances of that like `run-tests.py -j26 -l --chg test-racy-mutations.t`, over 100 with -j108, and other combinations (with and without the added testcases, with and without `--chg`, etc.)
  
  I'm on a rather beefy linux machine, based on Debian testing, using Python3.9, on a commit descended from 856820b4 <https://phab.mercurial-scm.org/rHG856820b497fcf31b7904e0b160c318437581d0c0>.
  
  It hasn't failed a single time, let alone like that. I also don't know what would cause that kind of failure. :(

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D9952/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D9952

To: spectral, indygreg, #hg-reviewers
Cc: Alphare, martinvonz, joerg.sonnenberger, mercurial-patches
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