setdiscovery: limit the size of all sample (issue4411) Further digging on this issue show that the limit on the sample size used in discovery never works for heads. Here is a quote from the code itself: desiredlen = size - len(always) if desiredlen <= 0: # This could be bad if there are very many heads, all unknown to the # server. We're counting on long request support here. The long request support never landed and evolution make the "very many heads, all unknown to the server" case quite common. We implement a simple and stupid hard limit of sample size for all query. This should prevent HTTP 414 error with the current state of the code.

hook: protect commit hooks against stripping of temporary commit (issue4422) History rewriting commands like histedit tend to use temporary commits. They may schedule hook execution on these temporary commits for after the lock has been released. But temporary commits are likely to have been stripped before the lock is released (and the hook run). Hook executed for missing revisions leads to various crashes. We disable hooks execution for revision missing in the repo. This provides a dirty but simple fix to user issues.

mq: do not call [0] on revset The __getitem__ method have been removed. The "first" method is to be used instead. Test have been extended to test this code path.

addset: fix `first` and `last` on sorted addset (issue4426) The lazy sorting were not enforced on addset. This was made visible through MQ.