Outdated Mercurial (version 3.0.1) causes "SSL: TLSV1_ALERT_PROTOCOL_VERSION" in Linux Flatpak install

报告指出了 Linux Flatpak 安装、Chorus 的发送/接收路径以及捆绑的 Mercurial 3.0.1；首先定位 Flatpak 在哪里打包或调用 Mercurial。针对报告中的 repository 重现 TLSV1_ALERT_PROTOCOL_VERSION 失败，然后在依赖问题得到解决后验证发送/接收流程是否正常工作。

Hi,
I have been using FieldWork Language Explorer for some time on an Archlinux machine, first via a windows virtual machine, and now with a Flatpak installation on Archlinux. I also have my own mercurial installation on a server of mine, but I am having issues with the send/receive function of FLEx, that is implemented - unless I'm very much mistaken - through chorus, hence me posting here (please let me know if this is not the right way to report this).

I have the following output on failure to sync:

Syncing...
Started at 2024-01-30 15:46:55Z
Local User: mark
LanguageForge User: flex
Repository URI: http://hg.archraspberrypi.tk/fieldwork_language_explorer
Local Directory: [PROJECT-PATH]/tungag

Executing: recover 
standerr: no interrupted transaction available

Executing: addremove -s 100 -I **.wav
Executing: parents --template "changeset:{rev}:{node|short}
branch:{branches}
user:{author}
date:{date|rfc822date}
tag:{tags}
summary:{desc}
parent:{p1rev}:{p1node}"
standout: changeset:126:dc2ebed055e6
branch:7500002.7000072
user:mark
date:Sun, 21 Jan 2024 13:17:20 +0100
tag:tip
summary:[FLExBridge: 1.0.0] sync
parent:125:021330251315b7e38bdec4a8972b39a86660e079

changeset:126:dc2ebed055e6
branch:7500002.7000072
user:mark
date:Sun, 21 Jan 2024 13:17:20 +0100
tag:tip
summary:[FLExBridge: 1.0.0] sync
parent:125:021330251315b7e38bdec4a8972b39a86660e079
Executing and caching: log -r0 --template "{node}" 
standout: a62f6a643784668b70be7f081c1206ed5fe3db88

Executing and caching: log -r126 --template "{node}" 
standout: dc2ebed055e6a4760ead4036486d890eeda7dc74

Using cached result: log -r0 --template "{node}" 
standout: a62f6a643784668b70be7f081c1206ed5fe3db88

Executing and caching: log -r125 --template "{node}" 
standout: 021330251315b7e38bdec4a8972b39a86660e079

Executing: parents --template "changeset:{rev}:{node|short}
branch:{branches}
user:{author}
date:{date|rfc822date}
tag:{tags}
summary:{desc}
parent:{p1rev}:{p1node}"
standout: changeset:126:dc2ebed055e6
branch:7500002.7000072
user:mark
date:Sun, 21 Jan 2024 13:17:20 +0100
tag:tip
summary:[FLExBridge: 1.0.0] sync
parent:125:021330251315b7e38bdec4a8972b39a86660e079

changeset:126:dc2ebed055e6
branch:7500002.7000072
user:mark
date:Sun, 21 Jan 2024 13:17:20 +0100
tag:tip
summary:[FLExBridge: 1.0.0] sync
parent:125:021330251315b7e38bdec4a8972b39a86660e079
Executing and caching: log -r0 --template "{node}" 
standout: a62f6a643784668b70be7f081c1206ed5fe3db88

Executing and caching: log -r126 --template "{node}" 
standout: dc2ebed055e6a4760ead4036486d890eeda7dc74

Using cached result: log -r0 --template "{node}" 
standout: a62f6a643784668b70be7f081c1206ed5fe3db88

Executing and caching: log -r125 --template "{node}" 
standout: 021330251315b7e38bdec4a8972b39a86660e079

Storing changes in local repository...
Split up project file: tungag.fwdata
Writing the linguistics data....
Writing reversal data....
Writing morphology and syntax data....
Writing lexical data....
Writing text corpus data....
Writing wordform and punctuation data....
Writing discourse data....
Writing phonology data....
Writing the anthropology data....
Writing the other data....
Writing the general data....
Writing user-defined list data....
Writing language project data....
Copying settings files...
Finished splitting up project file: tungag.fwdata
Executing: status  -mau  -X "~~*.txt" -X "**.NewChorusNotes" -X "**.fwdata" -X "**.fwdata-replaced" -X "**.fwdata-x" -X "**.fwdb" -X "**.bad" -X "**.bak" -X "**.flextext" -X "**.fwbackup" -X "**.fwstub" -X "**.lint" -X "**.log" -X "**.orig" -X "**.oxekt" -X "**.oxes" -X "**.oxesa" -X "**.tmp" -X "**.xml" -X "**.zip" -X "**.fwdata.lock" -X "**.dupid" -X "Temp/**.*" -X "BackupSettings/**.*" -X "WritingSystemStore/trash/**.*" -X "WritingSystemStore/WritingSystemsToIgnore.xml.ChorusNotes" -X "OtherRepositories/**.*" -X "**.mpa" -X "**.mpe" -X "**.mpg" -X "**.mpeg" -X "**.mpv2" -X "**.mp2" -X "**.mp4" -X "**.mov" -X "**.wmv" -X "**.rm" -X "**.avi" -X "**.wvx" -X "**.m1v" 
standout: M CachedSettings/WritingSystemStore/lcm.ldml
M General/LanguageProject.langproj
M Linguistics/Lexicon/Lexicon_03.lexdb
M WritingSystemStore/lcm.ldml
? CachedSettings/ConfigurationSettings/Dictionary/Preview.css
? CachedSettings/SharedSettings/Mark.ulsx
? CachedSettings/SharedSettings/mark.ulsx
? ConfigurationSettings/Dictionary/Hybrid.fwdictconfig
? ConfigurationSettings/Dictionary/Lexeme.fwdictconfig
? ConfigurationSettings/Dictionary/Preview.css
? ConfigurationSettings/Dictionary/Root.fwdictconfig
? ConfigurationSettings/LexEntry.fwlayout
? ConfigurationSettings/ReversalIndex/en.fwdictconfig
? ConfigurationSettings/ReversalIndex/tpi.fwdictconfig
? SharedSettings/LexiconSettings.plsx
? SharedSettings/Mark.ulsx
? SharedSettings/mark.ulsx
? WritingSystemStore/lcm-fonipa.ldml

Executing: status -d 
Adding files to be tracked ( -I "[PROJECT-PATH]/tungag/**.ChorusNotes" -I "[PROJECT-PATH]/tungag/FLExProject.ModelVersion" -I "[PROJECT-PATH]/tungag/FLExProject.CustomProperties" -I "[PROJECT-PATH]/tungag/do_not_share_project.txt" -I "[PROJECT-PATH]/tungag/.hgignore" -I "[PROJECT-PATH]/tungag/**.list" -I "[PROJECT-PATH]/tungag/**.style" -I "[PROJECT-PATH]/tungag/LinkedFiles/AudioVisual/**.*" -I "[PROJECT-PATH]/tungag/LinkedFiles/Others/**.*" -I "[PROJECT-PATH]/tungag/LinkedFiles/Pictures/**.*" -I "[PROJECT-PATH]/tungag/SupportingFiles/**.*" -I "[PROJECT-PATH]/tungag/CachedSettings/ConfigurationSettings/*.fwlayout" -I "[PROJECT-PATH]/tungag/CachedSettings/ConfigurationSettings/**.fwdictconfig" -I "[PROJECT-PATH]/tungag/CachedSettings/ConfigurationSettings/**Overrides.css" -I "[PROJECT-PATH]/tungag/CachedSettings/WritingSystemStore/*.ldml" -I "[PROJECT-PATH]/tungag/CachedSettings/SharedSettings/*.plsx" -I "[PROJECT-PATH]/tungag/Linguistics/Reversals/**.reversal" -I "[PROJECT-PATH]/tungag/Linguistics/Lexicon/*.lexdb" -I "[PROJECT-PATH]/tungag/Linguistics/TextCorpus/*.textincorpus" -I "[PROJECT-PATH]/tungag/Linguistics/Inventory/*.inventory" -I "[PROJECT-PATH]/tungag/Linguistics/Discourse/Charting.discourse" -I "[PROJECT-PATH]/tungag/Linguistics/**.featsys" -I "[PROJECT-PATH]/tungag/Linguistics/MorphologyAndSyntax/AnalyzingAgents.agents" -I "[PROJECT-PATH]/tungag/Linguistics/MorphologyAndSyntax/MorphAndSynData.morphdata" -I "[PROJECT-PATH]/tungag/Linguistics/Phonology/PhonologicalData.phondata" -I "[PROJECT-PATH]/tungag/Anthropology/DataNotebook.ntbk" -I "[PROJECT-PATH]/tungag/Other/ReferenceSystem.srs" -I "[PROJECT-PATH]/tungag/Other/*.ArchivedDraft" -I "[PROJECT-PATH]/tungag/Other/Translations.trans" -I "[PROJECT-PATH]/tungag/Other/Settings.ImportSetting" -I "[PROJECT-PATH]/tungag/Other/Books/*.bookannotations" -I "[PROJECT-PATH]/tungag/Other/Books/*.book" -I "[PROJECT-PATH]/tungag/General/FLExFilters.filter" -I "[PROJECT-PATH]/tungag/General/FLExAnnotations.annotation" -I "[PROJECT-PATH]/tungag/General/LanguageProject.langproj" -I "[PROJECT-PATH]/tungag/General/UnownedPictures.pictures" -I "[PROJECT-PATH]/tungag/General/VirtualOrdering.orderings" -I "[PROJECT-PATH]/tungag/**.ChorusRescuedFile" -X "[PROJECT-PATH]/tungag/~~*.txt" -X "[PROJECT-PATH]/tungag/**.NewChorusNotes" -X "[PROJECT-PATH]/tungag/**.fwdata" -X "[PROJECT-PATH]/tungag/**.fwdata-replaced" -X "[PROJECT-PATH]/tungag/**.fwdata-x" -X "[PROJECT-PATH]/tungag/**.fwdb" -X "[PROJECT-PATH]/tungag/**.bad" -X "[PROJECT-PATH]/tungag/**.bak" -X "[PROJECT-PATH]/tungag/**.flextext" -X "[PROJECT-PATH]/tungag/**.fwbackup" -X "[PROJECT-PATH]/tungag/**.fwstub" -X "[PROJECT-PATH]/tungag/**.lint" -X "[PROJECT-PATH]/tungag/**.log" -X "[PROJECT-PATH]/tungag/**.orig" -X "[PROJECT-PATH]/tungag/**.oxekt" -X "[PROJECT-PATH]/tungag/**.oxes" -X "[PROJECT-PATH]/tungag/**.oxesa" -X "[PROJECT-PATH]/tungag/**.tmp" -X "[PROJECT-PATH]/tungag/**.xml" -X "[PROJECT-PATH]/tungag/**.zip" -X "[PROJECT-PATH]/tungag/**.fwdata.lock" -X "[PROJECT-PATH]/tungag/**.dupid" -X "[PROJECT-PATH]/tungag/Temp/**.*" -X "[PROJECT-PATH]/tungag/BackupSettings/**.*" -X "[PROJECT-PATH]/tungag/WritingSystemStore/trash/**.*" -X "[PROJECT-PATH]/tungag/WritingSystemStore/WritingSystemsToIgnore.xml.ChorusNotes" -X "[PROJECT-PATH]/tungag/OtherRepositories/**.*" -X "[PROJECT-PATH]/tungag/**.mpa" -X "[PROJECT-PATH]/tungag/**.mpe" -X "[PROJECT-PATH]/tungag/**.mpg" -X "[PROJECT-PATH]/tungag/**.mpeg" -X "[PROJECT-PATH]/tungag/**.mpv2" -X "[PROJECT-PATH]/tungag/**.mp2" -X "[PROJECT-PATH]/tungag/**.mp4" -X "[PROJECT-PATH]/tungag/**.mov" -X "[PROJECT-PATH]/tungag/**.wmv" -X "[PROJECT-PATH]/tungag/**.rm" -X "[PROJECT-PATH]/tungag/**.avi" -X "[PROJECT-PATH]/tungag/**.wvx" -X "[PROJECT-PATH]/tungag/**.m1v"
Executing: add  -I "[PROJECT-PATH]/tungag/**.ChorusNotes" -I "[PROJECT-PATH]/tungag/FLExProject.ModelVersion" -I "[PROJECT-PATH]/tungag/FLExProject.CustomProperties" -I "[PROJECT-PATH]/tungag/do_not_share_project.txt" -I "[PROJECT-PATH]/tungag/.hgignore" -I "[PROJECT-PATH]/tungag/**.list" -I "[PROJECT-PATH]/tungag/**.style" -I "[PROJECT-PATH]/tungag/LinkedFiles/AudioVisual/**.*" -I "[PROJECT-PATH]/tungag/LinkedFiles/Others/**.*" -I "[PROJECT-PATH]/tungag/LinkedFiles/Pictures/**.*" -I "[PROJECT-PATH]/tungag/SupportingFiles/**.*" -I "[PROJECT-PATH]/tungag/CachedSettings/ConfigurationSettings/*.fwlayout" -I "[PROJECT-PATH]/tungag/CachedSettings/ConfigurationSettings/**.fwdictconfig" -I "[PROJECT-PATH]/tungag/CachedSettings/ConfigurationSettings/**Overrides.css" -I "[PROJECT-PATH]/tungag/CachedSettings/WritingSystemStore/*.ldml" -I "[PROJECT-PATH]/tungag/CachedSettings/SharedSettings/*.plsx" -I "[PROJECT-PATH]/tungag/Linguistics/Reversals/**.reversal" -I "[PROJECT-PATH]/tungag/Linguistics/Lexicon/*.lexdb" -I "[PROJECT-PATH]/tungag/Linguistics/TextCorpus/*.textincorpus" -I "[PROJECT-PATH]/tungag/Linguistics/Inventory/*.inventory" -I "[PROJECT-PATH]/tungag/Linguistics/Discourse/Charting.discourse" -I "[PROJECT-PATH]/tungag/Linguistics/**.featsys" -I "[PROJECT-PATH]/tungag/Linguistics/MorphologyAndSyntax/AnalyzingAgents.agents" -I "[PROJECT-PATH]/tungag/Linguistics/MorphologyAndSyntax/MorphAndSynData.morphdata" -I "[PROJECT-PATH]/tungag/Linguistics/Phonology/PhonologicalData.phondata" -I "[PROJECT-PATH]/tungag/Anthropology/DataNotebook.ntbk" -I "[PROJECT-PATH]/tungag/Other/ReferenceSystem.srs" -I "[PROJECT-PATH]/tungag/Other/*.ArchivedDraft" -I "[PROJECT-PATH]/tungag/Other/Translations.trans" -I "[PROJECT-PATH]/tungag/Other/Settings.ImportSetting" -I "[PROJECT-PATH]/tungag/Other/Books/*.bookannotations" -I "[PROJECT-PATH]/tungag/Other/Books/*.book" -I "[PROJECT-PATH]/tungag/General/FLExFilters.filter" -I "[PROJECT-PATH]/tungag/General/FLExAnnotations.annotation" -I "[PROJECT-PATH]/tungag/General/LanguageProject.langproj" -I "[PROJECT-PATH]/tungag/General/UnownedPictures.pictures" -I "[PROJECT-PATH]/tungag/General/VirtualOrdering.orderings" -I "[PROJECT-PATH]/tungag/**.ChorusRescuedFile" -X "[PROJECT-PATH]/tungag/~~*.txt" -X "[PROJECT-PATH]/tungag/**.NewChorusNotes" -X "[PROJECT-PATH]/tungag/**.fwdata" -X "[PROJECT-PATH]/tungag/**.fwdata-replaced" -X "[PROJECT-PATH]/tungag/**.fwdata-x" -X "[PROJECT-PATH]/tungag/**.fwdb" -X "[PROJECT-PATH]/tungag/**.bad" -X "[PROJECT-PATH]/tungag/**.bak" -X "[PROJECT-PATH]/tungag/**.flextext" -X "[PROJECT-PATH]/tungag/**.fwbackup" -X "[PROJECT-PATH]/tungag/**.fwstub" -X "[PROJECT-PATH]/tungag/**.lint" -X "[PROJECT-PATH]/tungag/**.log" -X "[PROJECT-PATH]/tungag/**.orig" -X "[PROJECT-PATH]/tungag/**.oxekt" -X "[PROJECT-PATH]/tungag/**.oxes" -X "[PROJECT-PATH]/tungag/**.oxesa" -X "[PROJECT-PATH]/tungag/**.tmp" -X "[PROJECT-PATH]/tungag/**.xml" -X "[PROJECT-PATH]/tungag/**.zip" -X "[PROJECT-PATH]/tungag/**.fwdata.lock" -X "[PROJECT-PATH]/tungag/**.dupid" -X "[PROJECT-PATH]/tungag/Temp/**.*" -X "[PROJECT-PATH]/tungag/BackupSettings/**.*" -X "[PROJECT-PATH]/tungag/WritingSystemStore/trash/**.*" -X "[PROJECT-PATH]/tungag/WritingSystemStore/WritingSystemsToIgnore.xml.ChorusNotes" -X "[PROJECT-PATH]/tungag/OtherRepositories/**.*" -X "[PROJECT-PATH]/tungag/**.mpa" -X "[PROJECT-PATH]/tungag/**.mpe" -X "[PROJECT-PATH]/tungag/**.mpg" -X "[PROJECT-PATH]/tungag/**.mpeg" -X "[PROJECT-PATH]/tungag/**.mpv2" -X "[PROJECT-PATH]/tungag/**.mp2" -X "[PROJECT-PATH]/tungag/**.mp4" -X "[PROJECT-PATH]/tungag/**.mov" -X "[PROJECT-PATH]/tungag/**.wmv" -X "[PROJECT-PATH]/tungag/**.rm" -X "[PROJECT-PATH]/tungag/**.avi" -X "[PROJECT-PATH]/tungag/**.wvx" -X "[PROJECT-PATH]/tungag/**.m1v" 
Committing "[FLExBridge: 1.0.0] sync"
mark committing with comment: [FLExBridge: 1.0.0] sync
Executing: ci -u "mark" -m "[FLExBridge: 1.0.0] sync" 

Executing: status --change tip
standout: M CachedSettings/WritingSystemStore/lcm.ldml
M General/LanguageProject.langproj
M Linguistics/Lexicon/Lexicon_03.lexdb
M WritingSystemStore/lcm.ldml

M CachedSettings/WritingSystemStore/lcm.ldml
M General/LanguageProject.langproj
M Linguistics/Lexicon/Lexicon_03.lexdb
M WritingSystemStore/lcm.ldml
Validating CachedSettings/WritingSystemStore/lcm.ldml
Validating General/LanguageProject.langproj
Validating Linguistics/Lexicon/Lexicon_03.lexdb
Validating WritingSystemStore/lcm.ldml
Executing: parents --template "changeset:{rev}:{node|short}
branch:{branches}
user:{author}
date:{date|rfc822date}
tag:{tags}
summary:{desc}
parent:{p1rev}:{p1node}"
standout: changeset:127:68a92d84c743
branch:7500002.7000072
user:mark
date:Tue, 30 Jan 2024 16:47:04 +0100
tag:tip
summary:[FLExBridge: 1.0.0] sync
parent:126:dc2ebed055e6a4760ead4036486d890eeda7dc74

changeset:127:68a92d84c743
branch:7500002.7000072
user:mark
date:Tue, 30 Jan 2024 16:47:04 +0100
tag:tip
summary:[FLExBridge: 1.0.0] sync
parent:126:dc2ebed055e6a4760ead4036486d890eeda7dc74
Executing and caching: log -r0 --template "{node}" 
standout: a62f6a643784668b70be7f081c1206ed5fe3db88

Executing and caching: log -r127 --template "{node}" 
standout: 68a92d84c743ff4c99f6f12d12ebddffa9e9ca34

Using cached result: log -r0 --template "{node}" 
standout: a62f6a643784668b70be7f081c1206ed5fe3db88

Executing and caching: log -r126 --template "{node}" 
standout: dc2ebed055e6a4760ead4036486d890eeda7dc74

Using cached result: log -r0 --template "{node}" 
standout: a62f6a643784668b70be7f081c1206ed5fe3db88

Connecting to hg.archraspberrypi.tk...
Using cached result: log -r0 --template "{node}" 
standout: a62f6a643784668b70be7f081c1206ed5fe3db88

Pinging hg.archraspberrypi.tk...
Ping took 36 milliseconds
Receiving any changes from hg.archraspberrypi.tk
(hg.archraspberrypi.tk is http://flex:********@hg.archraspberrypi.tk/fieldwork_language_explorer)
Initiating Normal Transport
Executing: tip --template "changeset:{rev}:{node|short}
branch:{branches}
user:{author}
date:{date|rfc822date}
tag:{tags}
summary:{desc}
"
standout: changeset:127:68a92d84c743
branch:7500002.7000072
user:mark
date:Tue, 30 Jan 2024 16:47:04 +0100
tag:tip
summary:[FLExBridge: 1.0.0] sync

changeset:127:68a92d84c743
branch:7500002.7000072
user:mark
date:Tue, 30 Jan 2024 16:47:04 +0100
tag:tip
summary:[FLExBridge: 1.0.0] sync
Using cached result: log -r0 --template "{node}" 
standout: a62f6a643784668b70be7f081c1206ed5fe3db88

Using cached result: log -r127 --template "{node}" 
standout: 68a92d84c743ff4c99f6f12d12ebddffa9e9ca34

Checking for proxy by trying to http-get http://proxycheck.palaso.org...
RobustNetworkOperation.Do()
Executing: pull "http://flex:********@hg.archraspberrypi.tk/fieldwork_language_explorer" 
standerr: abort: error: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:727)

Executing: version
standout: Mercurial Distributed SCM (version 3.0.1)
(see http://mercurial.selenic.com for more information)

Copyright (C) 2005-2014 Matt Mackall and others
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Mercurial Distributed SCM (version 3.0.1)
(see http://mercurial.selenic.com for more information)

Copyright (C) 2005-2014 Matt Mackall and others
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Warning: Could not receive from hg.archraspberrypi.tk
Exception: abort: error: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:727)

hg command was
pull "http://flex:********@hg.archraspberrypi.tk/fieldwork_language_explorer" 
hg version is Mercurial Distributed SCM (version 3.0.1)
(see http://mercurial.selenic.com for more information)


  at Chorus.VcsDrivers.Mercurial.HgRepository.PullFromTarget (System.String targetLabel, System.String targetUri) [0x00112] in <03c3e6c8d3114a508600fb24b8226210>:0 
  at Chorus.VcsDrivers.Mercurial.HgNormalTransport.Pull () [0x00000] in <03c3e6c8d3114a508600fb24b8226210>:0 
  at Chorus.VcsDrivers.Mercurial.HgRepository.Pull (Chorus.VcsDrivers.RepositoryAddress source, System.String targetUri) [0x00055] in <03c3e6c8d3114a508600fb24b8226210>:0 
  at Chorus.sync.Synchronizer.PullFromOneSource (Chorus.VcsDrivers.Mercurial.HgRepository repo, Chorus.VcsDrivers.RepositoryAddress source, System.Collections.Generic.Dictionary`2[TKey,TValue] connectionAttempt) [0x00102] in <03c3e6c8d3114a508600fb24b8226210>:0 
  at Chorus.sync.Synchronizer.PullFromOthers (Chorus.VcsDrivers.Mercurial.HgRepository repo, System.Collections.Generic.List`1[T] sourcesToTry, System.Collections.Generic.Dictionary`2[TKey,TValue] connectionAttempt) [0x0001e] in <03c3e6c8d3114a508600fb24b8226210>:0 
  at Chorus.sync.Synchronizer.SyncNow (Chorus.sync.SyncOptions options) [0x00081] in <03c3e6c8d3114a508600fb24b8226210>:0 
abort: error: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:727)

hg command was
pull "http://flex:********@hg.archraspberrypi.tk/fieldwork_language_explorer" 
hg version is Mercurial Distributed SCM (version 3.0.1)
(see http://mercurial.selenic.com for more information)

Trivially, if I disable the redirect on my server from the http:// to https:// URL, then sync works fine. Also, if I allow deprecated TLSv1, it also works. However, I would rather avoid doing either of those, as they seem like bad solutions to what should be fixable on mercurial's end.

The mercurial version that is bundled in the Flatpak is obviously very very old... 3.0.1 dates back to June 2014, and we are now on 6.5.1! I understand there had probably been a lot of development going on both in Chorus and Fieldworks since then, and that this issue is likely not present in more recent version, but since they aren't available to the Flatpak installers such as myself, is there a way anybody can think of of working around this? I'm open to tinkering and testing stuff. Even rebuilding a flatpak or whatever.

Any help or suggestions would be much appreciated.
Best regards,
Mark.