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Manually sync from internal repo #44

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merged 68 commits into from
Aug 21, 2020
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Skip some problematic commits. This is done by:

phps RunShipItScript  --project=eden --skip-push  --destination-use-ssh --skip-source-commits=3fe9fc3ddf3a4115e205d2ed075fc470d979deae,5795a5839b37ca3559e1fff1962a7af6d7a5379d

quark-zju and others added 29 commits August 21, 2020 12:55
Summary: The value of linkrev is invalid with segmented changelog. Do not resolve it.

Reviewed By: sfilipco

Differential Revision: D23036079

fbshipit-source-id: 8f8b097458bc694327db6ba4e2dc4107bdf44157
Summary:
This allows us to try segmented changelog while maintaining revlog
compatibility.

Reviewed By: sfilipco

Differential Revision: D22970583

fbshipit-source-id: 7c43cdadd76300e76e89f38aac5ed3ecc0cff728
Summary: This will be used to describe what the commit graph backend is.

Reviewed By: sfilipco

Differential Revision: D22970577

fbshipit-source-id: 753efdbdd4466730ece758d9f4789fbd21e2801b
Summary:
This allows dag to use renderdag in tests to verify graph result. Previously
it was hard because dag <-> renderdag would form circular dependency.

It also make it possible to implement more efficient and integrated fast paths
for graph rendering.

Reviewed By: sfilipco

Differential Revision: D22970570

fbshipit-source-id: 526497339bd7aa8898d1af4aa9cf6d2a6797aae0
Summary:
This allows importing from other DAGs. It will be used to import revlog DAG to
the new segmented format.

Reviewed By: sfilipco

Differential Revision: D22970572

fbshipit-source-id: 0a183e7b64831574cc9c60d4639124d02d19cf43
Summary: Update bindings to expose the DoubleWrite backend and the DescribeBackend API.

Reviewed By: sfilipco

Differential Revision: D22970574

fbshipit-source-id: bdb52ff21dd0b9ffa0be214b4a4824025f460092
Summary: As titled.

Differential Revision: D23216535

fbshipit-source-id: 4d278cd1f5d4c661eddda265d92f51d391192404
Reviewed By: iahs

Differential Revision: D23035578

fbshipit-source-id: 24e68e693751cc7e7f7b3c0db966581b72469f0a
Summary:
We already had a logic that prints if we are about to run an expensive
getbundle. However this logic prints a warning after we've fetched 1M commits
already, and user would have to wait for a long time to get this message.

However in some cases we can give this warning very quickly. For example, if
the lowest "heads" generation number is >1M commits away from highest "common"
generation number, then we can print the warning right away.

Differential Revision: D23213482

fbshipit-source-id: 67e2399ca958703129cf3c22d82ce48cbbdcd2d1
Summary:
If the warm bookmarks cache doesn't contain the bookmark we are looking for,
this might just be because it's a scratch bookmark, which aren't included in
that cache.

Always request the bookmark from the backing db if the cache misses.

Reviewed By: StanislavGlebik

Differential Revision: D23238009

fbshipit-source-id: c8843f1974ba14f148e30ba78a38eb710e7383b6
Summary: This fixes the Windows build.

Reviewed By: farnz

Differential Revision: D23212195

fbshipit-source-id: 159f3ddebf6a97f52f9b6c80ef19315c8f4b0c85
Summary:
Large numbers of pending obsmarkers can cause commit cloud `update_references`
requests to fail.

Prevent this from happening by only syncing the most recent obsmarkers.
Obsmarkers are in the process of being deprecated and removed, so this
shouldn't be a problem for long.

Reviewed By: farnz

Differential Revision: D23211621

fbshipit-source-id: 56a2e103722c3c162eacdb62638ff8ff614d5815
Summary: Avoid trying to send local obsmarkers if evolution is not enabled.

Reviewed By: farnz

Differential Revision: D23210800

fbshipit-source-id: dc247a18e92f6f5454eeed520854dd6254f66257
Summary:
If a cloud sync requires both fetching from the cloud and uploading new state to the cloud,
commit the transaction between the two steps, so that a successful cloud fetch is not
rolled back by failure to send to the cloud.

While we're here, limit the number of sync attempts to 3 in one go.

Reviewed By: farnz

Differential Revision: D23211846

fbshipit-source-id: fa97165d94eee973284ff3d00466387b3041306c
Summary:
Add tests for basic functionality of `resolve_bookmark` and `list_bookmarks`,
ensuring that they correctly go through the warm bookmarks cache.

`list_bookmarks` was still using old-style streams, so upgrade it to new streams.

Differential Revision: D23239250

fbshipit-source-id: f78abae2d382263be76c34f1488249677134a74d
Summary: The `map_err` call can be done with the new future from `compat()`.

Reviewed By: StanislavGlebik

Differential Revision: D23239251

fbshipit-source-id: c80609ae0a975bc54253784e002a07a048651aa3
Summary:
Dynamicconfigs compares the timestamp of config files with the current
timestamp to determine when to regenerate. If the timestamp of the config file
is newer than the current timestamp, Rust throws an exception. Let's handle that
case and treat it as if the file was just created instead of crashing.

Reviewed By: quark-zju

Differential Revision: D23230216

fbshipit-source-id: ca185de7dfca46953e04ec08c84668eda6d749bd
Summary:
Related commits: D23214677 (facebook@dcb5654), D23213192

In the previous commits we added phabricator callsigns to the repo configs.
Since we can extract the callsigns from them, we don't need the callsign
flag for repo_import tool. This diff removes the flag and uses the config variable.

Reviewed By: StanislavGlebik

Differential Revision: D23240398

fbshipit-source-id: d8b853d37e21be97af42e9f50658b9f471f8fc48
Summary:
We've been using a hard coded list to determine whether
mononoke is available, and that list is falling behind the current
state of our backend migration.

This commit removes the hard coded list in favor of testing
`remotefile.reponame`.  If that is configured then it holds
the mononoke reponame.

I'm making the assumption that it being set implies that mononoke
is available for that repo.  That may not be 100% true, but
it appears to be effectively true for the intersection of repos
known to `fbclone` and the migrated set of repos.

If this code decides that mononoke is supported, the behavior
in EdenFS is to then attempt to use the SCS to fetch tree
data using the returned `repo.name`.  That appears to be the
only way that this information is used today.

Reviewed By: quark-zju

Differential Revision: D23214471

fbshipit-source-id: 17b6475b891df5423dca0c18ddae0838795f713a
Summary:
This option is needed to validate Mononoke Smartlog against the original
infinitepush Commit Cloud Smartlog. This option is advanced and can be removed
after full migration to the Mononoke backend.

Reviewed By: markbt

Differential Revision: D23241251

fbshipit-source-id: e550334b104d18bb58d39acb8540ebdc9e711c4e
Summary: Make `hg doctor` repair the `hgcommits` directory.

Reviewed By: singhsrb

Differential Revision: D23249534

fbshipit-source-id: fd252479638e1e8ed4665531a804d2862993d25e
Summary: For now it just prints some details about the changelog backend.

Reviewed By: DurhamG, sfilipco

Differential Revision: D22970573

fbshipit-source-id: 719a5e5bb6f3856df3c9357e47daa9e7c8584952
Summary:
This will be used for migrating revlog DAG to segmented changelog. It does not
migrate commit text data (which can take 10+ minutes).

Reviewed By: DurhamG, sfilipco

Differential Revision: D22970582

fbshipit-source-id: 125a8726d48e15ceb06edb139d6d5b2fc132a32c
Summary: This allows migrating between a few changelog formats we have.

Reviewed By: DurhamG

Differential Revision: D22970571

fbshipit-source-id: d6b577ae5beb72a43fff999c26c35fcdc33e8f83
Summary:
This allows certain code paths to use `dageval` with the idea that `dageval` is
going to be faster.

Reviewed By: sfilipco

Differential Revision: D22970576

fbshipit-source-id: ba4536a55691de63640e574c898320629c6d7b2f
Summary:
By default, `torevs` calls Python iteration for non-list, non-spans Python
objects. The `idset` object has the `spans` which can be used as a fast
path.

Reviewed By: DurhamG

Differential Revision: D22970580

fbshipit-source-id: f491404ba803c4468c17cd74daaea90f46b8b38b
Summary: The Rust "flush(masternodes)" API does not handle nullid. Filter it out from Python.

Reviewed By: sfilipco

Differential Revision: D22970578

fbshipit-source-id: 671fe950948067a0b3f97c5b65ff2b9b7ed4b631
quark-zju and others added 27 commits August 21, 2020 12:55
Summary:
This affects the `tonodes` API in the Python world. Practically this will bind
the main commit graph to sets like draft, public.

The `ToSet` requirement on `DagAlgorithm` has to be removed to avoid stack
overflow of rustc resolving constraints.

Reviewed By: sfilipco

Differential Revision: D23036077

fbshipit-source-id: 912b924e29611680ab6b2ee4dbcd7ab39824409a
Summary:
While testing the `obsolete()` set, I found an in-memory segmented DAG takes
10x time to build than a HashMap DAG.

Part of the inefficiency is to use a translated "parent_func" that round-trips
through Id and Vertex, used by segment building logic. This diff makes
`IdMap::assign_head` return flat segments, so we don't need a translated
"parent_func" to build flat segments.

This diff only adds checks to make sure the parent_func (Id version) matches
the segments. The next diff switches the segment building to not use the
translated parent_func.

Reviewed By: sfilipco

Differential Revision: D23036060

fbshipit-source-id: 99137f4b5be455cdf43218ba23eb3954b6d9e05a
Summary:
Follow up of the previous change by actually using the flat segments to build
segments. This significantly improved the perf. `cargo bench --bench dag_ops`
shows:

  building segments (old)                           774.109 ms
  building segments (new)                           143.879 ms

Besides, a `O(N^2)` update to `head_ids` is changed. It improves performance
when the graph has many heads (ex. the mutation graph).

Reviewed By: sfilipco

Differential Revision: D23036080

fbshipit-source-id: 033565700f253c6f20e30a00adb6b579921d6679
Summary: This is useful to investigate internals of dag calculations.

Reviewed By: sfilipco

Differential Revision: D23095473

fbshipit-source-id: 4750c1b4ffad32b1317051d17db9659aaaed59c4
Summary:
I noticed that high-level segments are somehow not built for non-master vertexes.
Add a test to demonstrate the issue.

Reviewed By: DurhamG, sfilipco

Differential Revision: D23095466

fbshipit-source-id: c5a6da14bdfabcf7c432f6c6dfe096c71cc10ee9
Summary:
If there is no new master segments, it's still possible to have new non-master
segments. Fix the loop condition so we don't skip building non-master segments.

Reviewed By: sfilipco

Differential Revision: D23095465

fbshipit-source-id: 46eb9d5b5f2b04241981558646e0bc090652abce
Summary:
Optimize get_dag:
- Avoid parsing mutation entries once they are parsed, by keeping an in-memory
  `parent_map`.
- Pass `heads` to `add_heads` so the segments are less fragmented, cycle break
  helper is more efficient.

The `heads` optimization is effective. Practically this makes `get_dag` about 2x faster.

This has a subtle change on cycle handling - full cycle without any non-cycle heads will
be ignored. Practically cycles are rare so it might be okay.

Together with improvements on the `dag` side, `get_dag` is about 4x faster.

Reviewed By: markbt

Differential Revision: D23036062

fbshipit-source-id: 3dc407b562f7ebf2543a87c5cd651ad6a2339d67
Summary:
The new path does not calculate the complicated `successorssets`, and is
known to make wez's repo operations significantly faster (which, I suspect is
slowed by a very long chain).

The new code is about 3x faster on my repo too:

  # before
  In [1]: list(repo.nodes('draft()'))
  In [2]: %time len(m.mutation.obsoletenodes(repo))
  CPU times: user 246 ms, sys: 42.2 ms, total: 288 ms
  Wall time: 316 ms
  Out[2]: 1127

  # after
  In [1]: list(repo.nodes('draft()'))
  In [2]: %time len(m.mutation.obsoletenodes(repo))
  CPU times: user 74.3 ms, sys: 7.92 ms, total: 82.3 ms
  Wall time: 82.3 ms
  Out[2]: 1127

Reviewed By: markbt

Differential Revision: D23036063

fbshipit-source-id: afd6ac122bb5d8d513b5cdc033e04d2c377286eb
…sors

Summary: Expose the Rust API so `getdag` can choose to skip successors or predecessors.

Reviewed By: markbt

Differential Revision: D23036056

fbshipit-source-id: 30cd437c5420d2d10176e33ef9de98814046f4ce
Summary:
The `notbackedup()` revset is used as part of `summary` that prints information
at the end of `smartlog`. It can take hundreds of milliseconds if there are
many heads. Detect segmented changelog and use a fast path for it.

Practically this reduces `summary` from 594ms to 91ms for me:

With segmented changelog (doublewrite backend) and new code path:

    91    \ summary                             status.py:23
     2      \ currentworkspace                  workspace.py:121
     3       | _get (2 times)                   workspace.py:110
     3       | read (2 times)                   config.py:195
     3       | parse (2 times)                  config.py:116
     2       | compile (14 times)               util.py:1464
     3      \ __init__                          syncstate.py:44
    82      \ revs                              localrepo.py:1203

With revlog and old code path:

   594    \ summary                             status.py:23
     2      \ currentworkspace                  workspace.py:121
     4       | _get (2 times)                   workspace.py:110
     3       | read (2 times)                   config.py:195
     3       | parse (2 times)                  config.py:116
     3       | compile (14 times)               util.py:1464
     3      \ __init__                          syncstate.py:44
    46      \ revs                              localrepo.py:1203
   539      \ _iterfilter                       smartset.py:647
   538       | <lambda> (1565 times)            commitcloud/__init__.py:371
   537       | __contains__ (1565 times)        smartset.py:1039
   533       | _consumegen (17355 times)        smartset.py:1122

Reviewed By: markbt

Differential Revision: D23036075

fbshipit-source-id: 09dcc34f34a42814c6526e558d40b4d75ba9d75f
Summary:
The `compact` template is rarely used and is coupled with rev numbers (ex. rev
number decides what "parents" to show). Use explicit templates.  This makes the
test change easier to check.

Reviewed By: DurhamG

Differential Revision: D23036076

fbshipit-source-id: f2cc0f25191711fa7d846a8ad38aee8fb9171273
Summary: Migrated by `./fix-revnum.py`.

Reviewed By: DurhamG

Differential Revision: D23036082

fbshipit-source-id: cf456b3625e39329c817c696691494dc6725bc22
Summary:
Detect the "segments" backend and calculate the revset differently.

Practically, with collapse-obsolete disabled, the time of related revset
calculation drops from 0.14s to 0.03s in my fbsource repo.

The `obsolete()` set calculation is expensive (0.4-0.6s) and a bit more
expensive with the new DAG APIs, which will be addressed in upcoming
changes. EDIT: Addressed by D23036063.

Reviewed By: DurhamG

Differential Revision: D23036055

fbshipit-source-id: 71140a88599cc68bfa90d564c786da89b3ebd38b
Summary:
OSX doesn't support touch -d. Let's just skip that part of the test on
that platform. This fixes the OSX build.

Reviewed By: singhsrb

Differential Revision: D23253475

fbshipit-source-id: 0eccb884cbdd4bf0a4068fbf943ba7dac9df4e04
Summary:
GitHub commits:

facebook/fbthrift@07f7124

Reviewed By: jurajh-fb

fbshipit-source-id: 4226a740b5e431e54f5115a79f878ef139c5ab38
Summary:
Add alternative paths will be faster if changelog2 is used, since they are
backed by native paths.

Add a config option to disable the fast paths if they cause issues.

Reviewed By: DurhamG

Differential Revision: D23036074

fbshipit-source-id: 489b6eac64148867c209d595623d0b9c21ad1d5a
Summary:
Read git commit graph and migrate them to `dag::Dag`.

This allows using Rust dag abstractions on the git
commit graph.

Reviewed By: DurhamG

Differential Revision: D23095471

fbshipit-source-id: 2163701350ce82ce6e97074e56ad5877f3c9c158
Summary: Migrate to concrete types so it can be typechecked.

Reviewed By: DurhamG

Differential Revision: D23095469

fbshipit-source-id: 27c6da30ca8a1329df544cd2ded7d9734593e48a
Summary:
The backend translates git commit graph to segments. It's useful for
benchmarking on git commit graphs.

Reviewed By: DurhamG

Differential Revision: D23095470

fbshipit-source-id: 21a28869e91ef8f38bbf9925443eb4ac26f05e3d
Summary:
The immediate goal is to run benchmarks on a commit graph provided by a git
repo without converting a whole (large) repo from git to hg. Note git repos can
be cloned in a shallow way so it only contains the commit graph. For example:

  git clone https://github.com/torvalds/linux --filter=tree:0 -n

Note: The above command writes repositoryformat=1 in `.git/config`
which is not supported by libgit2. Manually editing it to repositoryformat=0
would enable libgit2 to read it for this crate's use-case.

In the longer term we might want to extend the support so refs/trees/files can
be read/written directly via the git repo based on this work. However that's
currently beyond scope.

Reviewed By: DurhamG

Differential Revision: D23095467

fbshipit-source-id: 868beb0c7de60453b47962639863eb8f7e3f5753
Summary: Ensure that the commit text is verified, but do not verify git hashes.

Reviewed By: DurhamG

Differential Revision: D23095464

fbshipit-source-id: e62341f6c7258c6f18b7cc75088c25dfc7040ab1
Summary:
The fuzz tests need `TestContext::id_dag()`, which was removed by D20471712 (facebook@1fb5acf).
Restore it so fuzz tests can run. This is mainly to check the new `range`
function.

The `range` fuzz test does find an issue caused by `>` written as `>=`
relatively quickly.

Reviewed By: sfilipco

Differential Revision: D23106176

fbshipit-source-id: e9540cc932503a9d54246d24c70bac829fcb13df
Summary:
GitHub commits:

facebook/fbthrift@cb9cdc2
facebook/proxygen@88cd0b8

Reviewed By: jurajh-fb

fbshipit-source-id: a860a5a46fccf0a7c77a7c89c9c4f3e0a87de406
Summary: The command is needed to restore a deleted workspace

Reviewed By: markbt

Differential Revision: D23250376

fbshipit-source-id: e24a7cbc0aad004291853b4c34d7474789aa9c2b
Summary:
GitHub commits:

facebook/folly@91a2c0c
facebook/mcrouter@6be67b4
facebook/rocksdb@a1b5484

Reviewed By: jurajh-fb

fbshipit-source-id: 6f5da4baf85787d8e812b0626145997629748e42
Summary:
Use `git config core.autocrlf false` to silent warnings like:

```
   $ git add alpha
+  warning: LF will be replaced by CRLF in alpha.
+  The file will have its original line endings in your working directory
```

Reviewed By: sfilipco

Differential Revision: D23270146

fbshipit-source-id: af3bf241edb9f615bcc285b51cc491385f208039
Summary: This makes it a bit easier to track down perf issues printed by RUST_LOGs.

Reviewed By: sfilipco

Differential Revision: D23095463

fbshipit-source-id: 78221a1992389f512fac6e6e633be6d19123e04a
@quark-zju quark-zju merged commit e7f3167 into facebook:master Aug 21, 2020
facebook-github-bot pushed a commit that referenced this pull request Mar 17, 2021
Summary:
This can cause a deadlock if `func()` calls `create_callsite`.

Usually it's rare. But (Python) signal handler makes it realistic.

Example backtrace:

  Traceback (most recent call first):
    File "/opt/fb/mercurial/edenscm/tracing.py", line 337, in event
    File "/opt/fb/mercurial/edenscm/mercurial/ui.py", line 1275, in debug
      tracing.debug(msg.rstrip("\n"), depth=1)
    File "/opt/fb/mercurial/edenscm/mercurial/commandserver.py", line 608, in _reapworkers
      self.ui.debug("worker process exited (pid=%d)\n" % pid)
    File "/opt/fb/mercurial/edenscm/mercurial/commandserver.py", line 591, in _sigchldhandler
      self._reapworkers(os.WNOHANG)
    File "/opt/fb/mercurial/edenscm/tracing.py", line 337, in event
    File "/opt/fb/mercurial/edenscm/mercurial/ui.py", line 1275, in debug
      tracing.debug(msg.rstrip("\n"), depth=1)
    File "/opt/fb/mercurial/edenscm/mercurial/commandserver.py", line 608, in _reapworkers
      self.ui.debug("worker process exited (pid=%d)\n" % pid)
    File "/opt/fb/mercurial/edenscm/mercurial/commandserver.py", line 591, in _sigchldhandler
      self._reapworkers(os.WNOHANG)

  #0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
  #1  0x000055d0d65ba339 in <parking_lot::raw_rwlock::RawRwLock>::lock_upgradable_slow ()
  #2  0x000055d0d55b5814 in tracing_runtime_callsite::create_callsite::<tracing_runtime_callsite::callsite_info::EventKindType, pytracing::new_callsite<tracing_runtime_callsite::callsite_info::EventKindType>::{closure#2}> ()
  #3  0x000055d0d5584cb9 in <pytracing::EventCallsite>::__new__ ()
  #4  0x000055d0d55a3eaa in std::panicking::try::<*mut python3_sys::object::PyObject, cpython::function::handle_callback<<pytracing::EventCallsite>::create_instance::TYPE_OBJECT::wrap_newfunc::{closure#0}, pytracing::EventCallsite, cpython::function::PyObjectCallbackConverter>::{closure#0}> ()
  #5  0x000055d0d5589365 in cpython::function::handle_callback::<<pytracing::EventCallsite>::create_instance::TYPE_OBJECT::wrap_newfunc::{closure#0}, pytracing::EventCallsite, cpython::function::PyObjectCallbackConverter> ()
  #6  0x000055d0d55856e1 in <pytracing::EventCallsite>::create_instance::TYPE_OBJECT::wrap_newfunc ()
  #7  0x00007ff88d576230 in type_call (
      kwds={'obj': Frame 0x7ff87c1f8c40, for file /opt/fb/mercurial/edenscm/mercurial/commandserver.py, line 608, in _reapworkers (self=<unixforkingservice(ui=<ui(_buffers=[], _bufferstates=[], _bufferapplylabels=None, _outputui=None, callhooks=True, insecureconnections=False, _colormode=None, _styles={}, _terminaloutput=None, cmdname=None, _uiconfig=<uiconfig(quiet=False, verbose=False, debugflag=False, tracebackflag=False, logmeasuredtimes=False, _rcfg=<localrcfg(_rcfg=<bindings.configparser.config at remote 0x7ff87d7325d0>) at remote 0x7ff87eb73e80>, _unserializable={}, _pinnedconfigs=set(), _knownconfig={'alias': <itemregister(_generics={<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': <itemregister(_generics=set()) at remote 0x7ff87d6ad9f0>, 'auth': <itemregister(_generics=set()) at remote 0x7ff87dc037c0>, 'blackbox': <itemregister(_generics=set()) at remote 0x7ff87d...(truncated), args=(),
      type=0x55d0d8ea5b40 <_RNvNvMs1R_CsgCrAUYYhx1D_9pytracingNtB8_13EventCallsite15create_instance11TYPE_OBJECT.llvm.4665269759137401160>) at Objects/typeobject.c:974
  #8  _PyObject_MakeTpCall (callable=<type at remote 0x55d0d8ea5b40>, args=<optimized out>,
      nargs=<optimized out>, keywords=<optimized out>) at Objects/call.c:159
  #9  0x00007ff88d56dc81 in _PyObject_Vectorcall (
      kwnames=('obj', 'name', 'target', 'level', 'fieldnames'), nargsf=<optimized out>,
      args=<optimized out>, callable=<type at remote 0x55d0d8ea5b40>) at ./Include/cpython/abstract.h:125
  #10 _PyObject_Vectorcall (kwnames=('obj', 'name', 'target', 'level', 'fieldnames'),
      nargsf=<optimized out>, args=<optimized out>, callable=<type at remote 0x55d0d8ea5b40>)
      at ./Include/cpython/abstract.h:115
  #11 call_function (kwnames=('obj', 'name', 'target', 'level', 'fieldnames'), oparg=<optimized out>,
      pp_stack=<synthetic pointer>, tstate=<optimized out>) at Python/ceval.c:4963
  #12 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3515
  #13 0x00007ff88d566268 in PyEval_EvalFrameEx (throwflag=0,
      f=Frame 0x7ff87cced010, for file /opt/fb/mercurial/edenscm/tracing.py, line 337, in event (message='worker process exited (pid=3953080)', name=None, target=None, level=1, depth=1, meta={}, frame=Frame 0x7ff87c1f8c40, for file /opt/fb/mercurial/edenscm/mercurial/commandserver.py, line 608, in _reapworkers (self=<unixforkingservice(ui=<ui(_buffers=[], _bufferstates=[], _bufferapplylabels=None, _outputui=None, callhooks=True, insecureconnections=False, _colormode=None, _styles={}, _terminaloutput=None, cmdname=None, _uiconfig=<uiconfig(quiet=False, verbose=False, debugflag=False, tracebackflag=False, logmeasuredtimes=False, _rcfg=<localrcfg(_rcfg=<bindings.configparser.config at remote 0x7ff87d7325d0>) at remote 0x7ff87eb73e80>, _unserializable={}, _pinnedconfigs=set(), _knownconfig={'alias': <itemregister(_generics={<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': ...(truncated))
      at Python/ceval.c:741
  #14 _PyEval_EvalCodeWithName (_co=<optimized out>, globals=<optimized out>, locals=<optimized out>,
      args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>, kwargs=0x7ff87c0fdc78,
      kwcount=<optimized out>, kwstep=1, defs=0x7ff87d572558, defcount=4, kwdefs=0x0, closure=0x0,
      name='event', qualname='event') at Python/ceval.c:4298
  #15 0x00007ff88d57fdce in _PyFunction_Vectorcall (func=<optimized out>, stack=0x7ff87c0fdc70,
      nargsf=<optimized out>, kwnames=<optimized out>) at Objects/call.c:435
  #16 0x00007ff88d57574f in _PyObject_FastCallDict (callable=<function at remote 0x7ff87d5741f0>,
      args=0x7ff87eb63838, nargsf=<optimized out>, kwargs=<optimized out>) at Objects/call.c:104
  #17 0x00007ff88d66d1ab in partial_fastcall (kwargs={'level': 1, 'depth': 1}, nargs=<optimized out>,
      args=<optimized out>, pto=0x7ff87d572630) at ./Modules/_functoolsmodule.c:169
  #18 partial_call (pto=0x7ff87d572630, args=<optimized out>, kwargs=<optimized out>)
      at ./Modules/_functoolsmodule.c:224
  #19 0x00007ff88d576331 in _PyObject_MakeTpCall (callable=<functools.partial at remote 0x7ff87d572630>,
      args=<optimized out>, nargs=<optimized out>, keywords=<optimized out>) at Objects/object.c:2207
  #20 0x00007ff88d56dc81 in _PyObject_Vectorcall (kwnames=('depth',), nargsf=<optimized out>,
      args=<optimized out>, callable=<functools.partial at remote 0x7ff87d572630>)
      at ./Include/cpython/abstract.h:125
  #21 _PyObject_Vectorcall (kwnames=('depth',), nargsf=<optimized out>, args=<optimized out>,
      callable=<functools.partial at remote 0x7ff87d572630>) at ./Include/cpython/abstract.h:115
  #22 call_function (kwnames=('depth',), oparg=<optimized out>, pp_stack=<synthetic pointer>,
      tstate=<optimized out>) at Python/ceval.c:4963
  #23 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3515
  #24 0x00007ff88d566268 in PyEval_EvalFrameEx (throwflag=0,
      f=Frame 0x7ff87c0e43c0, for file /opt/fb/mercurial/edenscm/mercurial/ui.py, line 1275, in debug (self=<ui(_buffers=[], _bufferstates=[], _bufferapplylabels=None, _outputui=None, callhooks=True, insecureconnections=False, _colormode=None, _styles={}, _terminaloutput=None, cmdname=None, _uiconfig=<uiconfig(quiet=False, verbose=False, debugflag=False, tracebackflag=False, logmeasuredtimes=False, _rcfg=<localrcfg(_rcfg=<bindings.configparser.config at remote 0x7ff87d7325d0>) at remote 0x7ff87eb73e80>, _unserializable={}, _pinnedconfigs=set(), _knownconfig={'alias': <itemregister(_generics={<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': <itemregister(_generics=set()) at remote 0x7ff87d6ad9f0>, 'auth': <itemregister(_generics=set()) at remote 0x7ff87dc037c0>, 'blackbox': <itemregister(_generics=set()) at remote 0x7ff87dc039a0>, 'bookmarks': <itemregister(_generics=se...(truncated))
      at Python/ceval.c:741
  #25 _PyEval_EvalCodeWithName (_co=<optimized out>, globals=<optimized out>, locals=<optimized out>,
      args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>, kwargs=0x7ff87c1f8de8,
      kwcount=<optimized out>, kwstep=1, defs=0x0, defcount=0, kwdefs=0x0, closure=0x0, name='debug',
      qualname='ui.debug') at Python/ceval.c:4298
  #26 0x00007ff88d57fdce in _PyFunction_Vectorcall (func=<optimized out>, stack=0x7ff87c1f8dd8,
      nargsf=<optimized out>, kwnames=<optimized out>) at Objects/call.c:435
  #27 0x00007ff88d56821a in _PyObject_Vectorcall (kwnames=0x0, nargsf=<optimized out>,
      args=0x7ff87c1f8dd8, callable=<function at remote 0x7ff87d57e9d0>)
      at ./Include/cpython/abstract.h:127
  #28 call_function (kwnames=0x0, oparg=<optimized out>, pp_stack=<synthetic pointer>,
      tstate=0x7ff88ca08780) at Python/ceval.c:4963
  #29 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3486
  #30 0x00007ff88d57fd38 in PyEval_EvalFrameEx (throwflag=0,
      f=Frame 0x7ff87c1f8c40, for file /opt/fb/mercurial/edenscm/mercurial/commandserver.py, line 608, in _reapworkers (self=<unixforkingservice(ui=<ui(_buffers=[], _bufferstates=[], _bufferapplylabels=None, _outputui=None, callhooks=True, insecureconnections=False, _colormode=None, _styles={}, _terminaloutput=None, cmdname=None, _uiconfig=<uiconfig(quiet=False, verbose=False, debugflag=False, tracebackflag=False, logmeasuredtimes=False, _rcfg=<localrcfg(_rcfg=<bindings.configparser.config at remote 0x7ff87d7325d0>) at remote 0x7ff87eb73e80>, _unserializable={}, _pinnedconfigs=set(), _knownconfig={'alias': <itemregister(_generics={<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': <itemregister(_generics=set()) at remote 0x7ff87d6ad9f0>, 'auth': <itemregister(_generics=set()) at remote 0x7ff87dc037c0>, 'blackbox': <itemregister(_generics=set()) at remote 0x7ff87dc039a0>,...(truncated))
      at Python/ceval.c:738
  #31 function_code_fastcall (globals=<optimized out>, nargs=2, args=<optimized out>, co=<optimized out>)
      at Objects/call.c:283
  #32 _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>,
      kwnames=<optimized out>) at Objects/call.c:410
  #33 0x00007ff88d56821a in _PyObject_Vectorcall (kwnames=0x0, nargsf=<optimized out>,
      args=0x7ff87c0f26d8, callable=<function at remote 0x7ff87d73b310>)
      at ./Include/cpython/abstract.h:127
  #34 call_function (kwnames=0x0, oparg=<optimized out>, pp_stack=<synthetic pointer>,
      tstate=0x7ff88ca08780) at Python/ceval.c:4963
  #35 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3486
  #36 0x00007ff88d57fd38 in PyEval_EvalFrameEx (throwflag=0,
      f=Frame 0x7ff87c0f2550, for file /opt/fb/mercurial/edenscm/mercurial/commandserver.py, line 591, in _sigchldhandler (self=<unixforkingservice(ui=<ui(_buffers=[], _bufferstates=[], _bufferapplylabels=None, _outputui=None, callhooks=True, insecureconnections=False, _colormode=None, _styles={}, _terminaloutput=None, cmdname=None, _uiconfig=<uiconfig(quiet=False, verbose=False, debugflag=False, tracebackflag=False, logmeasuredtimes=False, _rcfg=<localrcfg(_rcfg=<bindings.configparser.config at remote 0x7ff87d7325d0>) at remote 0x7ff87eb73e80>, _unserializable={}, _pinnedconfigs=set(), _knownconfig={'alias': <itemregister(_generics={<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': <itemreg
  ister(_generics=set()) at remote 0x7ff87d6ad9f0>, 'auth': <itemregister(_generics=set()) at remote 0x7ff87dc037c0>, 'blackbox': <itemregister(_generics=set()) at remote 0x7ff87dc039a...(truncated))
      at Python/ceval.c:738
  #37 function_code_fastcall (globals=<optimized out>, nargs=3, args=<optimized out>, co=<optimized out>)
      at Objects/call.c:283
  #38 _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>,
      kwnames=<optimized out>) at Objects/call.c:410
  #39 0x00007ff88d592153 in _PyObject_Vectorcall (kwnames=<optimized out>, nargsf=<optimized out>,
      args=<optimized out>, callable=<optimized out>) at ./Include/cpython/abstract.h:115
  #40 method_vectorcall (method=<optimized out>, args=<optimized out>, nargsf=<optimized out>,
      kwnames=<optimized out>) at Objects/classobject.c:67
  #41 0x00007ff88d5963fb in PyVectorcall_Call (kwargs=0x0, tuple=<optimized out>,
      callable=<method at remote 0x7ff87c70d5c0>) at Objects/dictobject.c:1802
  #42 PyObject_Call (callable=<method at remote 0x7ff87c70d5c0>, args=<optimized out>, kwargs=0x0)
      at Objects/call.c:227
  #43 0x00007ff88d6405ea in _PyErr_CheckSignals () at ./Modules/signalmodule.c:1689
  #44 0x00007ff88d5a41a1 in _PyErr_CheckSignals () at Objects/object.c:577
  #45 PyErr_CheckSignals () at ./Modules/signalmodule.c:1649
  #46 PyObject_Str (v='_reapworkers') at Objects/object.c:561
  #47 0x000055d0d557c821 in pytracing::tostr_opt ()
  #48 0x000055d0d55b5a7d in tracing_runtime_callsite::create_callsite::<tracing_runtime_callsite::callsite_info::EventKindType, pytracing::new_callsite<tracing_runtime_callsite::callsite_info::EventKindType>::{closure#2}> ()
  #49 0x000055d0d5584cb9 in <pytracing::EventCallsite>::__new__ ()
  #50 0x000055d0d55a3eaa in std::panicking::try::<*mut python3_sys::object::PyObject, cpython::function::handle_callback<<pytracing::EventCallsite>::create_instance::TYPE_OBJECT::wrap_newfunc::{closure#0}, pytracing::EventCallsite, cpython::function::PyObjectCallbackConverter>::{closure#0}> ()
  #51 0x000055d0d5589365 in cpython::function::handle_callback::<<pytracing::EventCallsite>::create_instance::TYPE_OBJECT::wrap_newfunc::{closure#0}, pytracing::EventCallsite, cpython::function::PyObjectCallbackConverter> ()
  #52 0x000055d0d55856e1 in <pytracing::EventCallsite>::create_instance::TYPE_OBJECT::wrap_newfunc ()
  #53 0x00007ff88d576230 in type_call (
      kwds={'obj': Frame 0x7ff87c1f8440, for file /opt/fb/mercurial/edenscm/mercurial/commandserver.py, line 608, in _reapworkers (self=<unixforkingservice(ui=<ui(_buffers=[], _bufferstates=[], _bufferapplylabels=None, _outputui=None, callhooks=True, insecureconnections=False, _colormode=None, _styles={}, _terminaloutput=None, cmdname=None, _uiconfig=<uiconfig(quiet=False, verbose=False, debugflag=False, tracebackflag=False, logmeasuredtimes=False, _rcfg=<localrcfg(_rcfg=<bindings.configparser.config at remote 0x7ff87d7325d0>) at remote 0x7ff87eb73e80>, _unserializable={}, _pinnedconfigs=set(), _knownconfig={'alias': <itemregister(_generics={<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': <itemregister(_generics=set()) at remote 0x7ff87d6ad9f0>, 'auth': <itemregister(_generics=set()) at remote 0x7ff87dc037c0>, 'blackbox': <itemregister(_generics=set()) at remote 0x7ff87d...(truncated), args=(),
      type=0x55d0d8ea5b40 <_RNvNvMs1R_CsgCrAUYYhx1D_9pytracingNtB8_13EventCallsite15create_instance11TYPE_OBJECT.llvm.4665269759137401160>) at Objects/typeobject.c:974
  #54 _PyObject_MakeTpCall (callable=<type at remote 0x55d0d8ea5b40>, args=<optimized out>,
      nargs=<optimized out>, keywords=<optimized out>) at Objects/call.c:159
  #55 0x00007ff88d56dc81 in _PyObject_Vectorcall (
      kwnames=('obj', 'name', 'target', 'level', 'fieldnames'), nargsf=<optimized out>,
      args=<optimized out>, callable=<type at remote 0x55d0d8ea5b40>) at ./Include/cpython/abstract.h:125
  #56 _PyObject_Vectorcall (kwnames=('obj', 'name', 'target', 'level', 'fieldnames'),
      nargsf=<optimized out>, args=<optimized out>, callable=<type at remote 0x55d0d8ea5b40>)
      at ./Include/cpython/abstract.h:115
  #57 call_function (kwnames=('obj', 'name', 'target', 'level', 'fieldnames'), oparg=<optimized out>,
      pp_stack=<synthetic pointer>, tstate=<optimized out>) at Python/ceval.c:4963
  #58 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3515
  #59 0x00007ff88d566268 in PyEval_EvalFrameEx (throwflag=0,
      f=Frame 0x7ff87ccec890, for file /opt/fb/mercurial/edenscm/tracing.py, line 337, in event (message='worker process exited (pid=3953122)', name=None, target=None, level=1, depth=1, meta={}, frame=Frame 0x7ff87c1f8440, for file /opt/fb/mercurial/edenscm/mercurial/commandserver.py, line 608, in _reapworkers (self=<unixforkingservice(ui=<ui(_buffers=[], _bufferstates=[], _bufferapplylabels=None, _outputui=None, callhooks=True, insecureconnections=False, _colormode=None, _styles={}, _terminaloutput=None, cmdname=None, _uiconfig=<uiconfig(quiet=False, verbose=False, debugflag=False, tracebackflag=False, logmeasuredtimes=False, _rcfg=<localrcfg(_rcfg=<bindings.configparser.config at remote 0x7ff87d7325d0>) at remote 0x7ff87eb73e80>, _u
  nserializable={}, _pinnedconfigs=set(), _knownconfig={'alias': <itemregister(_generics={<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': ...(truncated))
      at Python/ceval.c:741
  #60 _PyEval_EvalCodeWithName (_co=<optimized out>, globals=<optimized out>, locals=<optimized out>,
      args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>, kwargs=0x7ff87c0fdd78,
      kwcount=<optimized out>, kwstep=1, defs=0x7ff87d572558, defcount=4, kwdefs=0x0, closure=0x0,
      name='event', qualname='event') at Python/ceval.c:4298
  #61 0x00007ff88d57fdce in _PyFunction_Vectorcall (func=<optimized out>, stack=0x7ff87c0fdd70,
      nargsf=<optimized out>, kwnames=<optimized out>) at Objects/call.c:435
  #62 0x00007ff88d57574f in _PyObject_FastCallDict (callable=<function at remote 0x7ff87d5741f0>,
      args=0x7ff87eb59d18, nargsf=<optimized out>, kwargs=<optimized out>) at Objects/call.c:104
  #63 0x00007ff88d66d1ab in partial_fastcall (kwargs={'level': 1, 'depth': 1}, nargs=<optimized out>,
      args=<optimized out>, pto=0x7ff87d572630) at ./Modules/_functoolsmodule.c:169
  #64 partial_call (pto=0x7ff87d572630, args=<optimized out>, kwargs=<optimized out>)
      at ./Modules/_functoolsmodule.c:224
  #65 0x00007ff88d576331 in _PyObject_MakeTpCall (callable=<functools.partial at remote 0x7ff87d572630>,
      args=<optimized out>, nargs=<optimized out>, keywords=<optimized out>) at Objects/object.c:2207
  #66 0x00007ff88d56dc81 in _PyObject_Vectorcall (kwnames=('depth',), nargsf=<optimized out>,
      args=<optimized out>, callable=<functools.partial at remote 0x7ff87d572630>)
      at ./Include/cpython/abstract.h:125
  #67 _PyObject_Vectorcall (kwnames=('depth',), nargsf=<optimized out>, args=<optimized out>,
      callable=<functools.partial at remote 0x7ff87d572630>) at ./Include/cpython/abstract.h:115
  #68 call_function (kwnames=('depth',), oparg=<optimized out>, pp_stack=<synthetic pointer>,
      tstate=<optimized out>) at Python/ceval.c:4963
  #69 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3515
  #70 0x00007ff88d566268 in PyEval_EvalFrameEx (throwflag=0,
      f=Frame 0x7ff87c0e4200, for file /opt/fb/mercurial/edenscm/mercurial/ui.py, line 1275, in debug (self=<ui(_buffers=[], _bufferstates=[], _bufferapplylabels=None, _outputui=None, callhooks=True, insecureconnections=False, _colormode=None, _styles={}, _terminaloutput=None, cmdname=None, _uiconfig=<uiconfig(quiet=False, verbose=False, debugflag=False, tracebackflag=False, logmeasuredtimes=False, _rcfg=<localrcfg(_rcfg=<bindings.configparser.config at remote 0x7ff87d7325d0>) at remote 0x7ff87eb73e80>, _unserializable={}, _pinnedconfigs=set(), _knownconfig={'alias': <itemregister(_generics={<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': <itemregister(_generics=set()) at remote 0x7ff87d6ad9f0>, 'auth': <itemregister(_generics=set()) at remote 0x7ff87dc037c0>, 'blackbox': <itemregister(_generics=set()) at remote 0x7ff87dc039a0>, 'bookmarks': <itemregister(_generics=se...(truncated))
      at Python/ceval.c:741
  #71 _PyEval_EvalCodeWithName (_co=<optimized out>, globals=<optimized out>, locals=<optimized out>,
      args=<optimized out>, argcount=<optimized out>, kwnames=<optimized out>, kwargs=0x7ff87c1f85e8,
      kwcount=<optimized out>, kwstep=1, defs=0x0, defcount=0, kwdefs=0x0, closure=0x0, name='debug',
      qualname='ui.debug') at Python/ceval.c:4298
  #72 0x00007ff88d57fdce in _PyFunction_Vectorcall (func=<optimized out>, stack=0x7ff87c1f85d8,
      nargsf=<optimized out>, kwnames=<optimized out>) at Objects/call.c:435
  #73 0x00007ff88d56821a in _PyObject_Vectorcall (kwnames=0x0, nargsf=<optimized out>,
      args=0x7ff87c1f85d8, callable=<function at remote 0x7ff87d57e9d0>)
      at ./Include/cpython/abstract.h:127
  #74 call_function (kwnames=0x0, oparg=<optimized out>, pp_stack=<synthetic pointer>,
      tstate=0x7ff88ca08780) at Python/ceval.c:4963
  #75 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3486
  #76 0x00007ff88d57fd38 in PyEval_EvalFrameEx (throwflag=0,
      f=Frame 0x7ff87c1f8440, for file /opt/fb/mercurial/edenscm/mercurial/commandserver.py, line 608, in _reapworkers (self=<unixforkingservice(ui=<ui(_buffers=[], _bufferstates=[], _bufferapplylabels=None, _outputui=None, callhooks=True, insecureconnections=False, _colormode=None, _styles={}, _terminaloutput=None, cmdname=None, _uiconfig=<uiconfig(quiet=False, verbose=False, debugflag=False, tracebackflag=False, logmeasuredtimes=False, _rcfg=<localrcfg(_rcfg=<bindings.configparser.config at remote 0x7ff87d7325d0>) at remote 0x7ff87eb73e80>, _unserializable={}, _pinnedconfigs=set(), _knownconfig={'alias': <itemregister(_generics={<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': <itemregister(_generics=set()) at remote 0x7ff87d6ad9f0>, 'auth': <itemregister(_generics=set()) at remote 0x7ff87dc037c0>, 'blackbox': <itemregister(_generics=set()) at remote 0x7ff87dc039a0>,...(truncated))
      at Python/ceval.c:738
  #77 function_code_fastcall (globals=<optimized out>, nargs=2, args=<optimized out>, co=<optimized out>)
  {<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': <itemregister(_generics=set()) at remote 0x7ff87d6ad9f0>, 'auth': <itemregister(_generics=set()) at remote 0x7ff87dc037c0>, 'blackbox': <itemregister(_generics=set()) at remote 0x7ff87dc039a0>,...(truncated))
      at Python/ceval.c:738
  #77 function_code_fastcall (globals=<optimized out>, nargs=2, args=<optimized out>, co=<optimized out>)
  --Type <RET> for more, q to quit, c to continue without paging--
      at Objects/call.c:283
  #78 _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>,
      kwnames=<optimized out>) at Objects/call.c:410
  #79 0x00007ff88d56821a in _PyObject_Vectorcall (kwnames=0x0, nargsf=<optimized out>,
      args=0x7ff87c0f2528, callable=<function at remote 0x7ff87d73b310>)
      at ./Include/cpython/abstract.h:127
  #80 call_function (kwnames=0x0, oparg=<optimized out>, pp_stack=<synthetic pointer>,
      tstate=0x7ff88ca08780) at Python/ceval.c:4963
  #81 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3486
  #82 0x00007ff88d57fd38 in PyEval_EvalFrameEx (throwflag=0,
      f=Frame 0x7ff87c0f23a0, for file /opt/fb/mercurial/edenscm/mercurial/commandserver.py, line 591, in _sigchldhandler (self=<unixforkingservice(ui=<ui(_buffers=[], _bufferstates=[], _bufferapplylabels=None, _outputui=None, callhooks=True, insecureconnections=False, _colormode=None, _styles={}, _terminaloutput=None, cmdname=None, _uiconfig=<uiconfig(quiet=False, verbose=False, debugflag=False, tracebackflag=False, logmeasuredtimes=False, _rcfg=<localrcfg(_rcfg=<bindings.configparser.config at remote 0x7ff87d7325d0>) at remote 0x7ff87eb73e80>, _unserializable={}, _pinnedconfigs=set(), _knownconfig={'alias': <itemregister(_generics={<configitem(section='alias', name='.*', default=None, alias=[], generic=True, priority=0, _re=<re.Pattern at remote 0x7ff87d69bed0>) at remote 0x7ff87d690a60>}) at remote 0x7ff87dbfde50>, 'annotate': <itemregister(_generics=set()) at remote 0x7ff87d6ad9f0>, 'auth': <itemregister(_generics=set()) at remote 0x7ff87dc037c0>, 'blackbox': <itemregister(_generics=set()) at remote 0x7ff87dc039a...(truncated))
      at Python/ceval.c:738
  #83 function_code_fastcall (globals=<optimized out>, nargs=3, args=<optimized out>, co=<optimized out>)
      at Objects/call.c:283
  #84 _PyFunction_Vectorcall (func=<optimized out>, stack=<optimized out>, nargsf=<optimized out>,
      kwnames=<optimized out>) at Objects/call.c:410
  #85 0x00007ff88d592153 in _PyObject_Vectorcall (kwnames=<optimized out>, nargsf=<optimized out>,
      args=<optimized out>, callable=<optimized out>) at ./Include/cpython/abstract.h:115
  #86 method_vectorcall (method=<optimized out>, args=<optimized out>, nargsf=<optimized out>,
      kwnames=<optimized out>) at Objects/classobject.c:67
  #87 0x00007ff88d5963fb in PyVectorcall_Call (kwargs=0x0, tuple=<optimized out>,
      callable=<method at remote 0x7ff87c70d5c0>) at Objects/dictobject.c:1802
  #88 PyObject_Call (callable=<method at remote 0x7ff87c70d5c0>, args=<optimized out>, kwargs=0x0)
      at Objects/call.c:227
  #89 0x00007ff88d6405ea in _PyErr_CheckSignals () at ./Modules/signalmodule.c:1689
  #90 0x00007ff88d59b7fd in _PyErr_CheckSignals () at ./Modules/signalmodule.c:1660
  #91 PyErr_CheckSignals () at ./Modules/signalmodule.c:1649
  ....

Reviewed By: DurhamG

Differential Revision: D27111187

fbshipit-source-id: 1aa29ab24088b57b98de3741eb81c0a7be01237d
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