Mercurial > hgsubversion
view tests/fixtures/truncatedhistory.svndump @ 1550:67b28d657f62
sqliterevmap: break ".hashes()" cycle in a safer way
The `fromsvn()` revset implementation could cause weakref error when using
sqliterevmap like:
File "hgsubversion/util.py", line 357, in <lambda>
return subset.filter(lambda r: tonode(r) in hashes)
File "hgsubversion/maps.py", line 542, in __contains__
return self.get(key) != None
File "hgsubversion/maps.py", line 533, in get
for row in self.revmap._query(
ReferenceError: weakly-referenced object no longer exists
Basically the seemingly harmless assignment could break surprisingly:
# dangerous: `hashes` does not have a reference of `meta.revmap` and may
# become unavailable after `meta`, `revmap` being released by refcount.
hashes = meta.revmap.hashes()
The above syntax is nice to support while avoiding cycles is also nice.
This patch removes `revmap._hashes` so the revmap no longer owns a reference
of a `ReverseRevMap` object so the `ReverseRevMap` object no longer needs to
use weakref for `self.revmap`.
This could actually be caught by `comprehensive/test_sqlite_revmap.py`.
I was not careful enough verifying the "fromsvn()" patch.
| author | Jun Wu <quark@fb.com> |
|---|---|
| date | Thu, 21 Dec 2017 17:39:52 -0800 |
| parents | 3b60f223893a |
| children |
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SVN-fs-dump-format-version: 2 UUID: a632509c-657a-43d2-ae0b-85387476b20e Revision-number: 0 Prop-content-length: 56 Content-length: 56 K 8 svn:date V 27 2008-11-11T19:00:25.260082Z PROPS-END Revision-number: 1 Prop-content-length: 114 Content-length: 114 K 7 svn:log V 12 init project K 10 svn:author V 7 pmezard K 8 svn:date V 27 2008-11-11T19:00:25.322759Z PROPS-END Node-path: project1 Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Node-path: project2 Node-kind: dir Node-action: add Prop-content-length: 10 Content-length: 10 PROPS-END Revision-number: 2 Prop-content-length: 106 Content-length: 106 K 7 svn:log V 5 add a K 10 svn:author V 7 pmezard K 8 svn:date V 27 2008-11-11T19:00:26.173269Z PROPS-END Node-path: project1/a Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 60b725f10c9c85c70d97880dfe8191b3 Content-length: 12 PROPS-END a Revision-number: 3 Prop-content-length: 117 Content-length: 117 K 7 svn:log V 15 rename project1 K 10 svn:author V 7 pmezard K 8 svn:date V 27 2008-11-11T19:00:29.152593Z PROPS-END Node-path: project2/trunk Node-kind: dir Node-action: add Node-copyfrom-rev: 2 Node-copyfrom-path: project1 Prop-content-length: 34 Content-length: 34 K 13 svn:mergeinfo V 0 PROPS-END Node-path: project1 Node-action: delete Revision-number: 4 Prop-content-length: 106 Content-length: 106 K 7 svn:log V 5 add b K 10 svn:author V 7 pmezard K 8 svn:date V 27 2008-11-11T19:00:30.178261Z PROPS-END Node-path: project2/trunk/b Node-kind: file Node-action: add Prop-content-length: 10 Text-content-length: 2 Text-content-md5: 3b5d5c3712955042212316173ccf37be Content-length: 12 PROPS-END b