Mercurial > hg
view tests/test-hooklib-reject_new_heads.t @ 50242:379a78001d8e stable
dirstate: set identity whenever we read the dirstate's v2 docket
The docket can be loaded outside of a full read (for exemple when
pre-fetching parents), so the current code would read/set the identity
after loading the data, opening a race condition:
A0: first process docket is read
B0: other process appends new data to the dirstate (and changes the docket)
A1: first process sets the identity (based on pre-B content, but with post-B identity)
A1: first process loads the dirstatemap from the data file
A1: first process does not detect the race and overwrites the update from B.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Wed, 01 Mar 2023 02:38:20 +0100 |
parents | 4cabeea6d214 |
children |
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$ cat <<EOF >> $HGRCPATH > [extensions] > hooklib = > > [phases] > publish = False > EOF $ hg init a $ hg --cwd a debugbuilddag '.:parent.*parent' $ hg --cwd a log -G o changeset: 2:fa942426a6fd | tag: tip | parent: 0:1ea73414a91b | user: debugbuilddag | date: Thu Jan 01 00:00:02 1970 +0000 | summary: r2 | | o changeset: 1:66f7d451a68b |/ user: debugbuilddag | date: Thu Jan 01 00:00:01 1970 +0000 | summary: r1 | o changeset: 0:1ea73414a91b tag: parent user: debugbuilddag date: Thu Jan 01 00:00:00 1970 +0000 summary: r0 $ hg init b $ cat <<EOF >> b/.hg/hgrc > [hooks] > pretxnclose.reject_new_heads = \ > python:hgext.hooklib.reject_new_heads.hook > EOF $ hg --cwd b pull ../a pulling from ../a requesting all changes adding changesets adding manifests adding file changes error: pretxnclose.reject_new_heads hook failed: Changes on branch 'default' resulted in multiple heads transaction abort! rollback completed abort: Changes on branch 'default' resulted in multiple heads [255] $ hg --cwd b pull ../a -r 1ea73414a91b pulling from ../a adding changesets adding manifests adding file changes added 1 changesets with 0 changes to 0 files new changesets 1ea73414a91b (1 drafts) (run 'hg update' to get a working copy)